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DGtal 1.0

Bug Fixes

  • Configuration/General

    • Continuous integration AppVeyor fix #1326
  • Base

    • Fixes wrong members in PredicateCombiner (David Coeurjolly, #1321)
  • IO

    • Fix wrong typedef for double case in ITKReader (Adrien Krähenbühl, #1259)


Bug Fixes

  • Documentation
    • Fixing path to Mathjax CDN in documentation (David Coeurjolly, #1318)

DGtal 0.9.4

New Features / Critical Changes

  • Shapes

    • Mesh Voxelizer using 6- or 26-separability templated (David Coeurjolly, Monir Hadji, #1209)
  • Topology Package

    • Adding the half-edge data structure to represent arbitrary two-dimensional combinatorial surfaces with or without boundary (Jacques-Olivier Lachaud #1266)
    • Add VoxelComplex, an extension for CubicalComplex, implementing the Critical-Kernels framework, based on the work of M.Couprie and G.Bertrand on isthmus. (Pablo Hernandez, #1147)
  • Shapes Package

    • Adding classes and helpers to create triangulated surfaces and polygonal surfaces to convert them from/to mesh, as well as a conversion from digital surfaces to dual triangulated or polygonal surface (Jacques-Olivier Lachaud #1266)
  • Geometry Package

    • Laplace-Beltrami operators on digital surfaces. (Thomas Caissard, #1303)


  • Math package

    • New SimpleMatrix constructor with a initializer_list argument (Nicolas Normand, #1250)
  • IO

    • New simple way to extend the QGLViewer-based Viewer3D interface, for instance to add callbacks to key or mouse events, or to modify what is drawn on the window. (Jacques-Olivier Lachaud, #1259)
    • TableReader can now read all elements contained in each line of a file with the new method getLinesElementsFromFile(). (Bertrand Kerautret, #1260)
    • New ImageMagick writer to export images to PNG or JPG formats for instance. (David Coeurjolly, #1304)
    • SimpleDistanceColorMap new colormap to easily display distance maps. (David Coeurjolly, #1302)
    • Fix in MagicReader allowing to load colored images. (David Coeurjolly, #1305)
    • Include New ImageMagick writer in GenericWriter. (Bertrand Kerautret, #1306)

Bug Fixes

  • Build

    • Fix compilation by using DGtal from swift wrapping (Bertrand Kerautret, #1309)
    • Fix C++11 cmake flags and cmake >3.1 is now required (David Coeurjolly, Pablo H Cerdan, #1290)
    • Fix HDF5 link missing in compilation (Bertrand Kerautret, #1301)
    • Fix compilation with QGLViewer (2.7.x) and Qt5 (Boris Mansencal, #1300)
  • Shapes Package

    • Fix ImplicitPolynomial3Shape and TrueDigitalSurfaceLocalEstimator. Improves projection operator on implicit surface and curvature computations. (Jacques-Olivier Lachaud, #1279)
  • Configuration/General

    • Upgrading the benchmarks to match with the new google-benchmark API (David Coeurjolly, #1244
    • The documentation mainpage now refers to the DGtalTools documentation (David Coeurjolly, #1249
    • Fix ITK related try_compile command to work for non-default locations. (Pablo Hernandez, #1286
  • IO

    • Fix for compilation with 2.7.0 QGLViewer version. (Bertrand Kerautret, #1280)
    • Fix on the ITK reader when used with a functor which is not able to handle 32/16 bits images. Also includes a new testITKReader and ITK tests in GenericReader. (Bertrand Kerautret, #1255)
    • Viewer3D: fix bad light source move according X/Y mouse move and new Key_Z to move away/closer the light source. (Bertrand Kerautret, #1262)
    • Fix ImageContainerByITKImage, fill the itk image buffer with 0 when using the domain constructor. (Pablo Hernandez, #1307)
  • Kernel Package

    • Fix testBasicPointFunctor. (Bertrand Kerautret #1245)
  • Arithmetic Package

  • Fix SternBrocot and variants static instanciations. (Jacques-Olivier Lachaud #1293)

  • Topology Package

    • Fix invalid KhalimskyCell coordinates in ctopo-fillContours.cpp example. (Roland Denis, #1296)
  • Documentation

    • Add import with functors in GenericReader in the main default reader. (mainly motivated to show documentation of specialized version of importWithValueFunctor and importWithColorFunctor). The tiff format was also added to the generic readers when ITK is present (Bertrand Kerautret 1251)
    • Fix exampleArithDSS3d compilation (which was not activated). (Bertrand Kerautret #1254)
  • DEC

    • Fix dependencies flags for DEC examples. (Jean-David Génevaux, #1310)

DGtal 0.9.3

New Features / Critical Changes

  • Configuration/General

    • The project has a now a unique compiled library: DGtal. The DGtalIO target has been removed. (David Coeurjolly, #1226)
    • New mandatory dependency for DGtal: zlib must be installed in the system. (David Coeurjolly, #1228)
    • Remove cpp11 deprecated usage of std::binder1st and std::binder2nd --generates error with c++17 flag. (Pablo Hernandez, #1287)
    • Remove cpp11 deprecated usage of std::unary_function and std::binary_function --generates error with c++17 flag. (Pablo Hernandez, #1291)
  • Topology Package

    • Implementation of ParDirCollapse with CollapseSurface and CollapseIsthmus. (Mohamad ONAYSSI, Bibiana MARTINEZ, Mohamed MELLOULI, Kacper PLUTA, #1199)
  • Geometry Package

    • VoronoiMap, PowerMap, (Reverse)DistanceTransformation and ReducedMedialAxis now work on toric domains (with per-dimension periodicity specification). (David Coeurjolly, Roland Denis, #1206)
  • IO

    • New version (3) for the VOL file format that allows (zlib) compressed volumetric data. VolReady and VolWriter can still manage Version 2 Vols. (David Coeurjolly, #1228)


  • Configuration/General

    • Continuous integration Travis bots are now based on ubunutu/trusty containers. (David Coeurjolly, #1227)
    • Set flag -std=c++11 only if needed. Modern compilers set compatible flags by default (gnu++14, etc). (Pablo H Cerdan, #1222)
  • Documentation

    • All the example descriptions are now in their the examples file (instead in dox files). (Bertrand Kerautret, #1240)

Bug Fixes

  • Configuration/General

    • Fixing errors and warnings raised by g++ 4.7.x. (Roland Denis, #1202)
    • Explicit M_PI definition if needed. (David Coeurjolly, #1208)
    • Continuous integration Travis bots are now based on ubunutu/trusty containers. (David Coeurjolly, #1227)
    • Fix usage of DESTDIR at install time for linux packagers. (Pablo Hernandez, #1235)
    • Fix, let CMake handle DESTDIR instead of manual manipulation. (Pablo Hernandez, #1238)
  • Geometry Package

    • ArithDSSIterator: fix missing postfix ++. (I. Sivignon, #1187)
    • ContourHelper: add a method to transform a contour into a 8 connected path. (B. Kerautret, #1127)
  • IO Package

    • Missing TContainer template parameter for overloaded functions/methods that rely on PointVector. (Roland Denis, #1232)
    • Viewer3D: fix bad rendering when changing the scale. (Bertrand Kerautret, #1217)
  • Documentation

    • Fixing various BibTeX references. (Bertrand Kerautret, ##1237)

DGtal 0.9.2

New Features / Critical Changes

  • Documentation

    • Fixing all doxygen warnings. (Roland Denis, #1182)
    • New "@seeDGtalTools" doxygen command to cite a DGtalTools tool in DGtal documentation (David Coeurjolly, #1179)
  • Geometry Package

    • New robust normal vector estimator using spherical accumulators and statistical voting (Boulc'h & Marlet, SGP 2012). (David Coeurjolly, #1149)
  • Math Package

    • New RealFFT class for in-place real-complex Fast Fourier Transform using fftw3 library. (Roland Denis, #1185)
  • Topology Package

    • Adding periodic closure for KhalimskySpaceND and per-dimension closure specification. (Roland Denis, #1086)
    • Adding CPreCellularGridSpaceND concept and KhalimskyPreSpaceND model to manipulate unbounded Khalimsky space and cells. KhalimskySpaceND now checks that all given cells are within the bounds. (Roland Denis, #1086)


  • Configuration/General

    • Travis Continuous integration will check that doxygen raises no warnings and that the documented file names are valid. (David Coeurjolly, Roland Denis, #1182)
    • Cleaning remaining preprocessor directives related to C++11 features. (Roland Denis, #1141)
    • Travis Continuous integration will check that DGtalTools still compiles with changes in new pull-requests. (David Coeurjolly, #1133)
    • Add cmake configuration file NeighborhoodTablesConfig to decompress and install look up tables. (Pablo Hernandez-Cerdan, #1155)
    • Documentation graphs are now in SVG instead of PNG. (David Coeurjolly, #1192)
    • Check and add all DGtal examples in the Examples listing section. (Bertrand Kerautret,#1166)))
  • Base Package

    • Alias and ConstAlias now raise compilation error when using invalid constructor, like from a rvalue reference. Adding ConstAlias in many classes that need it. (Roland Denis, #1140) (With ITK related compilation fix, Bertrand Kerautret #1153)
    • Moving all base concepts into namespace concepts. Update doc and concepts graphs accordingly. (Jacques-Olivier Lachaud, [#1164] (
  • IO Package

    • Viewer3D: improvement of the viewer state record by saving the rendering mode. A new setter was also added to desable/enable double face rendering. (Bertrand Kerautret #1166)
    • Viewer3D: add a mode to display ball primitive with OpenGL point instead of quadrangulated mesh. (Bertrand Kerautret #1162)
    • Viewer3D: add a new mode to have the light source position defined from the camera (default) or from the scene coordinate system (key P to change position mode). A new lambertian rendering mode was added. (Bertrand Kerautret #1149)
    • Add the possibility to interact in QGLViewer Viewer3D class with the voxel primitive (was limited to surfel). As with surfel, the user may assign integer identifiers (OpenGL names) to voxel and callback functions, which are called when voxel are selected. The selected elements are now highlighted. (Bertrand Kerautret, #1146)
  • Topology Package

    • Add pre-calculated look up tables to speed up Object::isSimple calculations. (Pablo Hernandez-Cerdan, #1155)

Bug Fixes

  • Configuration/General

    • Simplification of the windows build instructions. (David Coeurjolly, #1160)
    • Various fixes in the documentation (e.g. links to concepts pages). (David Coeurjolly, #1161)
    • Fixing issues raised on some algorithms when changing Euclidean ring for SpaceND and KhalimskySpaceND. (Jérémy Levallois, #1163)
    • Moving last concepts to concepts:: namespace. (David Coeurjolly, #1193)
  • DEC Package

    • Fix compatibility with eigen 3.2.8 by changing default index type for sparse matrix. (Pierre Gueth, #1197)
    • Fixing warnings in DiscreteExteriorCalculus and DiscreteExteriorCalculusFactory. (Roland Denis, #1139)
  • Geometry Package

    • VoronoiCovarianceMeasure: fix dimension-specific code. (Roland Denis, #1145)
    • AlphaThickSegmentComputer: fix segment display errors which could appear when displaying a small segment. Fix a non initialized attribute with some improvements on bounding box computation with orientation check. (B. Kerautret, #1123)
    • Frechet Shortcut: fix implicit rounding. (I. Sivignon, #1180)
  • Image Package

    • Fixing issue #779 by storing domain with smart pointer in ImageContainerBySTLMap. (Roland Denis #1151)
  • IO Package

    • Display3D: Fix embedder usage when using default constructor in Debug mode. (Roland Denis #1143)
    • Viewer3D: Fix a problem when the show() method was called at the end of the main program (the list creation was not called). (Bertrand Kerautret #1138)
    • Viewer3D: add three new modes for shape rendering (default, metallic and plastic). The rendering can be changed by using the key M. The user can also choose its own rendering with some setter/getter on the opengl lightning/properties. (B. Kerautret, #1128)
    • readers: fix a vol/pgm/raw reading bug occurring on Windows 10 due to the different interpretations of end of line \r\n on Window versus \n on unix/mac. Changing reading mode with binary mode instead text mode fix the issue. (Bertrand Kerautret #1130)
    • Fixing issue #899 in all color maps, (David Coeurjolly, Bertrand Kerautret #1134)
    • GenericReader: include longvol reader in GenericReader for 64 bit images. Update the test for 64 bit longvol. (Bertrand Kerautret #1135)
    • Fix the extension removal in Obj filename export in Board3D. (David Coeurjolly,#1154))
    • Fix issue when drawing DSS with both points and bounding box. (David Coeurjolly,#1186))
  • Topology Package

    • Fix wrong starting point for surface tracking in example code frontierAndBoundary.cpp. (Roland Denis, #1144)
    • Fix interior/exterior fill methods of topology/helpers/Surfaces class which was wrong on 3d and on closed Khalimsky space. (Bertrand Kerautret, #1156)
    • Fix issue [#1168] (, related to bad linear interpolation for binary volume data in volMarchingCubes.cpp (Jacques-Olivier Lachaud, #1169)
  • Shape Package

    • Fix a tubular mesh construction problem (missing faces) which appears when the center line is oriented in a main axis direction (in createTubularMesh()). Also improves and fixes the face construction. (Bertrand Kerautret, #1157)

DGtal 0.9.1

New Features / Critical Changes

  • Configuration/General

    • A file has been added to describe how to contribute to the library. (David Coeurjolly, #1112)
    • DGtal requires now to have a C++11 enabled compiler (gcc>4.6, clang>2.9, VS14, ...). This allows us to use new C++11 features in DGtal core and to have more generic and reliable code. (David Coeurjolly, #1080)
    • DGtal core now compiles on Microsoft Windows, Visual Studio (only VS14 or above). Many issues have been fixed for compatibility with 'cl' compiler. (David Coeurjolly, Jérémy Levallois, #1074)
    • DGtal with QGLViewer option activated now compiles on Microsoft Windows, Visual Studio (only VS14 or above). (Bertrand Kerautret, #1106)
  • Base Package

    • Traits class for containers in order to probe their category at compile time. (Jacques-Olivier Lachaud, #1079)
    • Generic set operations for arbitrary containers. You may use overloaded operators like &, |, -, ^ on arbitrary containers (list, vector, unordered_set, map, etc). (Jacques-Olivier Lachaud, #1079)
  • Geometry Package

    • Hull2DHelpers: implementation of the rotating caliper algorithm to compute the width (vertical/horizontal or Euclidean) of a convex hull. (Bertrand Kerautret, #1052)
    • MelkmanConvexHull: new reverse method to allow point insertions and convex hull computation on both side of a point sequence. (Bertrand Kerautret, #1073)
    • LogScaleProfile: new class to represent a (multi)scale profile e.g. a sequence of statistics on digital lengths parameterized by a grid resolution. (Backport of the ScaleProfile class of ImaGene ). (Bertrand Kerautret, Jacques-Olivier Lachaud #1075)
    • IteratorCompletion provides iterators and ranges access from a basic set of methods. (Roland Denis, #1029)
  • Image Package

    • ArrayImageAdapter adds a read-write image adapter from any random-access iterator, e.g. from a C-array. (Roland Denis, #1029)
  • Math Package

    • MultiStatistics: new class to compute different statistics (like mean variance, median) on multiple variables. (Backport of the Statistics class of ImaGene ). (Bertrand Kerautret, Jacques-Olivier Lachaud #1076)
  • Topology Package

    • New class CubicalComplex and functions associated to it. Arbitrary cubical complexes can be represented, displayed and multiple operations are defined onto them: incidence, closing, opening, closure, star, link, interior, boundary, set operations and relations, as a collapse operation. (Jacques-Olivier Lachaud, #1079)


  • Configuration

    • Types and classes in helper namespaces Z2i and Z3i for StdDefs.h header (2D and 3D digital geometry with computations on 32bit integers) are now explicitly instanciated in the compiled library. This reduces compilation time when such types are used. (David Coeurjolly, #1117)
  • DEC Package

    • DiscreteExteriorCalculus holds both primal and dual sizes of each cell. Subsequent changes have been made to insertSCell. (Pierre Gueth #1082)
    • Convenient static members for KForm : KForm::ones(), KForm::zeros() and KForm::dirac(KSpace::Cell). (Pierre Gueth #1082)
  • Base Package

    • Enabling circulators in SimpleRandomAccessRangeFromPoint. (Roland Denis, #1060)
  • Base

    • Deprecated OldAlias, OldClone, OldConstAlias have been removed. (David Coeurjolly, #1074)
  • IO

    • By default, closing a Viewer3D does not save automatically the viewer state anymore (in a .qglviewer.xml file). The automatic save can be activated by a flag (myAutoSaveState). (Bertrand Kerautret #1088)
    • In the Viewer3D, the light source position is now saved in the QGLViewer state file (.qglviewer.xml). (Bertrand Kerautret #1087)
    • Minor improvements of default settings in Viewer3D. (David Coeurjolly, #1066)
    • change the chronological order to display primitives (in the draw function) in order to see the cube primitive through the transparency of the ball primitives. (Bertrand Kerautret, #1081)
    • New possibility to move the light source direction using the mouse move in Viewer3D (with the key SHIFT+CTRL (SHIFT+CMD on mac)). The light source direction is now defined according the main coordinate system (no more from the camera center). (Bertrand Kerautret #1070)
    • Adding raw I/O capabilities for non integral types and signed integers. (Roland Denis #1084)
  • Shapes Package

    • New methods to remove faces from a Mesh or to obtain the barycenter of a face. (Bertrand Kerautret #1091)

Bug Fixes

  • Configuration/General

    • catch unit test framework upgraded to the develop version. (David Coeurjolly, #1055)
    • Fixing boost include path issue when building tools using DGtal and its cmake DGtalConfig.cmake. (David Coeurjolly, #1059)
    • Fixing parenthese warnings in Catch. Waiting for an official fix. (Roland Denis, #1069)
    • Fix constness in selfDisplay and operator<<. (Pierre Gueth #1082)
    • DGtal cmake configuration scripts are now installed in the ${PREFIX_PATH}/lib/DGtal/ folder on linux systems (when running make install command). The documentation is copied to the folder ${PREFIX_PATH}/share/DGtal/html/. This fixes issue #1095. (David Coeurjolly, #1103)
    • Fix for swapped coordinates in TangentFromDSS2DFunctor. (Kacper Pluta, #1083)
    • Update of the page. (David Coeurjolly, #1109)
  • Base Package

    • Fix wrong initialization of reverse iterators in SimpleRandomAccess(Const)RangeFromPoint. (Roland Denis, #1060)
  • Geometry Package

    • Fix pseudo-random number generator in KanungoNoise (David Coeurjolly, #1078)
  • IO Package

    • Fix line export in Board3D. (Bertrand Kerautret ##1119)
    • Fix viewer tests including qt4 headers even with configuring WITH_QT5=ON. (Pablo Hernandez-Cerdan, #1100)
    • Fix Viewer3D axis display when they are included in a transparent element. (issue #873) (Bertrand Kerautret ##1108))

DGtal 0.9

New Features / Critical Changes

  • Geometry Package

  • New segment computer allowing the recognition of thick digital segments, adapted to noisy contours (from a given thickness parameter). The current implementation (mainly a backport from imagene) is a model of CForwardSegmentComputer with a ParallelStrip primitive. This primitive is similar to the blurred segment of [Debled-Rennesson etal 2005] with isothetic thickness. It is also an implementation of the alpha-thick segment of Alexandre Faure and Fabien Feschet. (Bertrand Kerautret, #963)

  • Configuration/General

    • Continuous integration enabled on both linux and macosx systems. Furthermore, the nightly build documentation is automatically deployed. (David Coeurjolly, #955)
    • New unit test framework based on catch. Catch allows to design quick and efficient unit tests with nice trace outputs. (David Coeurjolly, #1019)
    • Documentation added for Catch. (David Coeurjolly, #1042)
  • Kernel

    • New template class DigitalSetlByAssociativeContainer allows to define digital sets from any associative container of the STL. For instance, using std::unordered_set (c++11) or boost::unordered_set (hash function based containers), speed-up up to 40% can be measured when processing digital sets. (David Coeurjolly, #1023
    • By default, Z2i::DigitalSet, Z3i::DigitalSet and digital set from DigitalSetSelector use the new hash function based container. (David Coeurjolly, #1023
    • Specializations of std::hash (c++11) and boost::hash to define a hash functions on DGtal points. (David Coeurjolly, #1023


  • DEC Package

    • Coherent signed cells support allows lower dimension manifold embedding. (Pierre Gueth #977)
    • OppositeDuality struct allows generic hodge and laplace definition. (Pierre Gueth #977)
    • Easy k-form and vector field transversal using .length() and .getSCell(). (Pierre Gueth #977)
    • Unified operators interface : .hodge<order, duality>() replace primalHodge() and dualHodge(), .laplace() replace primalLaplace() and dualLaplace(). (Pierre Gueth #977)
    • New antiderivative<order, duality>() operator. (Pierre Gueth #977)
    • New flatDirectional<duality, direction>() and sharpDirectional<duality, direction>() operators defined as flat(vector_field_along_direction) and sharp(1-form).extractZeroForm(direction). (Pierre Gueth #977)
    • DiscreteExteriorCalculus<dim_embedded, dim_ambient, Backend> takes 2 dimension template parameters for embedding manifold in ambient euclidean space. (Pierre Gueth #977)
    • Basic openmp support for derivative computation. (Pierre Gueth #977)
    • New propagation example and extended embedding tests. (Pierre Gueth #977)
    • Improved operator generation using new CSparseMatrix concepts. (Pierre Gueth #1007)
    • DEC constructors are replaced by static factory functions: DiscreteExteriorCalculusFactory::createFromDigitalSet and DiscreteExteriorCalculusFactory::createFromNSCells. (Pierre Gueth #1008)
    • Mutable iterator on DiscreteExteriorCalculus. (Pierre Gueth #1008)
    • Unary minus operators for k-forms, vector fields and linear operators. (Pierre Gueth #1020)
    • Introduction of .updateIndexes() that needs to be called after any call to .insertSCell() or .eraseCell(). (Pierre Gueth #1020)
    • Transpose of linear operators. (Pierre Gueth #1020)
    • Intensity operator on vector fields. (Pierre Gueth #1020)
    • Reorder operators to remap indexes. (Pierre Gueth #1020)
  • Geometry Package

    • New EstimatorCache class to cache quantities estimated by a surfel local estimator. (David Coeurjolly, #927)
    • New digital surface local estimator that computes a sphere fitting. It requires to have the Patate library installed (and WITH_PATATE=true): See SphereFittingEstimator (David Coeurjolly, #929)
    • Algorithm to compute the union of two DSSs in logarithmic time (Isabelle Sivignon, #949)
    • InexactPredicateLpSeparableMetric class is now templated by an EuclideanRing type. (David Coeurjolly, #1017)
    • Main example files of geometry/curves are introduced in the list of examples and briefly described. (Tristan Roussillon, #1026)
    • New algorithms to compute the convex hull of planar point sets. (Tristan Roussillon, #1028)
    • Lambda maximal segment tangent direction estimator 2D/3D: LambdaMST2D, LambdaMST3D. A fast tangent direction estimator which uses maximal digital straight segments. (Kacper Pluta, #1021)
    • Segmentation of 3D digital curves by a combination of the segmentations of its 2D projections onto 2D base planes: XY, XZ, YZ. Notice that, only valid projections are used. By valid one understands that there are no two 3D points which are projected onto the same 2D point. A segment is computed as long as is extendable and at least two projections are valid. : NaiveDSS3DComputer. (Kacper Pluta, #1021)
  • Math Package

    • Utilities added (OrderedLinearRegression) to perform sequential linear model estimation of scalar data. (David Coeurjolly, Jérémy Levallois #935, backport from imagene)
    • New linear algebra concepts: CDenseVector, CDenseMatrix, CSparseMatrix. (Pierre Gueth #1007)
  • Image Package

  • IO Package

    • Fix RawWriter and RawReader. Added templated generic RawReader::importRaw and RawWriter::exportRaw. (Pierre Gueth #1010)
    • New 2D DEC board style with orientated cells. (Pierre Gueth #977)
    • Limited interaction added to QGLViewer Viewer3D class. The user may assign integer identifiers (OpenGL names) to surfels and callback functions, which are called when surfels are selected. (Jacques-Olivier Lachaud #942)
    • Balls can be exported to OBJ in Board3D and ball resolution can now be specified in Viewer3D and Board3D (David Coeurjolly, #945)
    • Viewer3d cleanings with better organisation through the separation of all code generating the GL lists. (Bertrand Kerautret) (#945)
    • Operators added to perform computations on Color objects (addition, substraction scaling...). Color is now CopyConstructible and Assignable (David Coeurjolly #940)
    • Improvement of memory footprint of DGtal::Color (David Coeurjolly, #961)
    • New colormap adapter to add ticks/iso-contours (regularly spaced or specified by the user) to a given colormap. (David Coeurjolly, #987)
    • New flag (-DWITH_QT5) enables QT5 support in libqglviewer. (Nicolas Aubry, #983)
    • Board2D now supports quadratic Bezier curve drawing. (Tristan Roussillon, #1002)
    • MeshWriter class can now export OBJ file including colors. (Bertrand Kerautret, #1016)
    • Viewer3D: Shift-L / L key binding added to save and restore camera settings. (Bertrand Kerautret, #1024)
    • Viewer3D: change the chronological order to diplay primitives (in the draw function) in order to see see textured image primitives through the transparency of other 3D primitives. (Bertrand Kerautret, #1041)
  • Kernel Package

  • HyperRectDomain can now be empty (lowerBound == upperBound + diagonal(1)). Warning about the use of lexicographical order in comparison operators of PointVector. (Roland Denis, #996)

    • Adds generic linearization (point to index) and reverse process (index to point), specialized for HyperRectDomain. (Roland Denis, #1039)
    • HyperRectDomain can now be empty (lowerBound == upperBound + diagonal(1)). Warning about the use of lexicographical order in comparison operators of PointVector. (Roland Denis, [#996](
  • Shapes Package

    • Adds a vertex Iterator in the Mesh class in addition to the ConstIterator and adds a new method to change the color of a specific face. (Bertrand Kerautret, #937)
    • New methods to generate basic 3D tubular meshes and height fields. New mesh module documentation added. (Bertrand Kerautret, #969)
    • Refactoring of CSG operations on Euclidean / Digital shapes to easily combine several operations. EuclideanShapesUnion, EuclideanShapesIntersection and EuclideanShapesMinus are now deprecated. Use EuclideanShapesCSG instead. DigitalShapesUnion, DigitalShapesIntersection and DigitalShapesMinus are now deprecated. Use DigitalShapesCSG instead. (Jérémy Levallois #962)
    • Add various methods in the Mesh class to get the bounding box, to change the mesh scale or to subdivide triangular faces. (Bertrand Kerautret, #990 and #992)
    • New copy constructor and copy operator on Mesh object (and documentation added about vertex ordering for obj format). (Bertrand Kerautret, #976)
  • Arithmetic Package

    • Algorithm to compute the fraction of smallest denominator in between two irreducible fractions (Isabelle Sivignon #949)

Bug Fixes

  • Configuration

    • Removing code coverage with (David Coeurjolly, 1040).
    • Forces Eigen 3.2.1 minimum (for a bug fix). (Jacques-Olivier Lachaud, 1032).
    • Fix issue #925, detection of Eigen3 (3.1 minimum) and also issue #924, DGtal configuration file when using Eigen3. (Jacques-Olivier Lachaud, #926)
    • Backport of changes in google/benchmarck API for micro-benchmarking (David Coeurjolly, #1014)
    • New travis configuration file to enable new travis Docker based container system (David Coeurjolly, #1030)
    • Various fixes of compiler warnings due to unused paramters (David Coeurjolly, Roland Denis, #1034)
  • Base Package

    • Fix bug with LabelledMap copy constructor and copy iterator. (Roland Denis, #973)
    • Fix bug with Labels iterator when first index is set (Roland Denis, #972)
    • Iterator category fix for boost > 1.57 (David Coeurjolly, #938)
    • Cleanup of DGtal namespaces (David Coeurjolly, #993)
  • Geometry Package

    • Fix bug occuring in the computation of the Faithful Polygon (class FP) in the closed case, ie. with circulators. (Tristan Roussillon, #939)
    • Fixing DSS based length estimator on open curves. (David Coeurjolly, #941)
    • Fix bug of method ArithmeticalDSL::getPoint with negative values of positions as input arguments. (Tristan Roussillon, #944)
    • Fix too restrictive asserts of methods ArithmeticalDSSConvexHull::smartCH and ArithmeticalDSSConvexHull::smartCHNextVertex to enable negative positions as input arguments. (Isabelle Sivignon, #950)
    • Fix Bezout Vector computation (Isabelle Sivignon, #948)
    • Fix issues with SphereFitting and TensorVoting local estimators on digital surfaces (Jérémy Levallois, David Coeurjolly #970)
  • IO Package

    • Performance improvement of color managment in Display3D, Board3D and Viewer3D: no more "createNew...List" when setting a new color. (David Coeurjolly, #958)
    • Radius and resolution of balls have been fixed when used to represent a 3D point in grid mode (David Coeurjolly, #978)
    • Change in the mesh export in OFF format: now it tries by default to export colors (if stored). (Bertrand Kerautret, #985)
    • Bugfix in quad visualization in BoardD3D and Viewer3D (David Coeurjolly, #980)
    • Fix warnings message of std::abs in Display3D. (Bertrand Kerautret, #991)
    • Fix memory leaks present in the Viewer3d. (Bertrand Kerautret, #995)
    • Fix issues in OBJ color export when exporting voxels. (David Coeurjolly, #1022)
    • Fix compilation issue on gentoo system related to MeshWriter (gcc version 4.9.2-r2). (Van Tho Nguyen, #1035)
    • Fix deprecated usage of setMouseBindingDescription with QGLViewer >= 2.5.0. (Roland Denis, #1036)
  • Kernel Package

    • BasicDomainSubSampler can now handle non 0 origin point. This update also correct the search of point which are outside the source domain (it is now checked in testBasicPointFunctors). (Bertrand Kerautret, 989).
  • Topology Package

    • Fix loop bug in extractAllConnectedSCell of Surfaces from helpers. (Bertrand Kerautret, 994).
  • DEC Package

    • Fix missing include in testEigenSolver. (Jacques-Olivier Lachaud, 1032).

DGtal 0.8

New Features / Critical Changes

  • General

    • This Changelog has been ported to MarkDown (David Coeurjolly, #846)
    • The DGtal main website is now
  • Global refactoring of base functors (David Coeurjolly, #861)

    • BasicFunctor functors have been moved to functors:: namespace.
    • DefaultFunctor has been renamed functors::Identity.
    • xxxFunctor have been renamed to xxx.
  • Moving graph, topology, geometry/estimation concepts into namespace concepts::, also moving some functors into namespace functors:: (Jacques-Olivier Lachaud, #912).

  • DEC Package

    • DGtal 0.8 contains the first release of the Discrete Exterior Calculus Package. DEC provides an easy and efficient way to describe linear operator over various structure. Basic operators, such as Hodge duality operator or exterior derivative, can be combined to create classical vector analysis operator such as gradient, curl and divergence. (Pierre Gueth, #877)
  • Geometry Package

    • Add digital nD Voronoi Covariance Measure support, as well as digital geometric estimators based on it. Add tests and examples of feature detection with VCM. (Jacques-Olivier Lachaud, #803)

    • Add Integral Invariant estimators so that they meet the concept of surface local estimator. Add geometric functors to define easily all the geometric estimators that can be built from the volume and coariance matrix. Previous estimators (IntegralInvariantMeanCurvatureEstimator and IntegralInvariantGaussianCurvatureEstimator) are removed. Please use the new ones instead. (Jeremy Levallois, Jacques-Olivier Lachaud, #803 #856 #893)

    • Various geometric predicates are now available in order to test the orientation of three points in the planes. Most classes are template classes parametrized by a type for the points (or its coordinates) and an integral type for the computations. They always return an exact value (or sign), provided that the integral type used for the computations is well chosen with respect to the coordinates of the points. Some implementations do not increase the size of the input integers during the computations. (Tristan Roussillon, #755)

    • Logarithmic construction of an arithmetical DSS of minimal parameters from a bounding DSL and two end points (ctor of ArithmeticalDSS) (Tristan Roussillon, #819)

    • Proof-of-concept that path-based norms can be implemented in a separable approach using logarithmic cost predicates (experimental::ChamferNorm2D). (David Coeurjolly, #898)

    • Logarithmic construction of an arithmetical DSS of minimal parameters from a bounding DSS (of known leaning points) and two end points (ctor of ArithmeticalDSS) (Tristan Roussillon, #914)

    • Feature extraction algorithm from Tensor Voting.(Jérémy Levallois, David Coeurjolly, #895)

    • Ray shooting intersection predicates (ray-triangle, ray-quad, ray-surfel) added in geometry/tools (David Coeurjolly, #904)

  • IO Package

    • Now VolReader/VolWriter and LongvolReader/LongvolWriter support the usage of Center-(X,Y,Z) parameters, as described in Vol file specification. (Jérémy Levallois, #879)
  • Math Package

    • New classes to compute nD eigen decomposition of symmetric matrix (class EigenDecomposition). Add tests. (Jacques-Olivier Lachaud, #803)
    • Simple Linear Regression tool added (backport from imagene). (David Coeurjolly, #794)
  • Kernel package

    • BasicPointFunctors functors have been moved in the functors:: namespace (David Coeurjolly, #863)
  • For developpers

  • Images

    • Classes to perform rigid transformations of 2D and 3D images (Kacper Pluta, #869)


  • Base Package

    • Add comparison operators in variants of CountedPtr. Improve coverage of these classes and fix compilation problem (Jacques-Olivier Lachaud)
    • Update doc of CountedPtr, CountedPtrOrPtr and CountedConstPtrOrConstPtr. Add asserts. Add tests. Fix issue 773 ( (Jacques-Olivier Lachaud, #894).
    • XXXOutputRangeYYY classes are now called XXXRangeWithWritableIteratorYYY (Tristan Roussillon, #850).
  • Geometry Package

    • Fix and add concept of CSurfelLocalEstimator and related ground truth estimators for implicit polynomial shapes (TrueDigitalSurfaceLocalEstimator). (Jacques-Olivier Lachaud, #803)
    • Random-access iterators added in ArithmeticalDSL. (Tristan Roussillon, #801)
    • Updates in Metric concepts: better and simpler concept structure and a new adapter to adapt any euclidean metric to a digital one (with values on Z) (David Coeurjolly, #870
    • CubicalSudivision has been renamed SpatialCubicalSubdivision and moved to "geometry/tools" (David Coeurjolly, #862)
  • IO Package

    • Better handling of materials in Board3D and OBJ exports. (David Coeurjolly, #784)
    • New 'basic' display mode for surfels (oriented or not), useful for large digital surface displays (quads instead of 3D prism) (Bertrand Kerautret, #783)
    • New clear() method to subclasses of Display3D (Viewer3D and Board3D) to clear the current drawning buffer. (Kacper Pluta, #807)
    • New draw() method for 3D display models (Viewer3D and Board3D) to display surfels with prescribed normal vectors (David Coeurjolly, #802).
    • When exporting an 3D visualization to OBJ, a new option will rescale the geometry to fit in [-1/2,1/2]^3. (David Coeurjolly, #820)
    • New raw import/export for 32 bits images (Bertrand Kerautret, #877)
  • Kernel Package

    • New functor DomainSubSampler allowing to apply different samplings with larger or smaller size on N dimensional domain. New tests and examples are given for 2D and 3D images (Bertrand Kerautret, 825 and 882).
  • Shapes Package

    • Shape concepts have been moved to concepts:: namespace (David Coeurjolly, #871)
  • Topology Package

    • Surfaces::findABell accepts now arbitrary pair of points (Jacques-Olivier Lachaud, David Coeurjolly, #851)

Bug Fixes

  • Base Package

    • Fixing issue on Circulator/IteratorFunctions (related to #770 on MacOS).
  • Kernel Package

    • BinaryPointPredicate is now specialized for DGtal::AndBoolFct2 and DGtal::OrBoolFct2 in order to guarantee that the second computation is not performed when the first point predicate return false (resp. true) with DGtal::AndBoolFct2 (resp. DGtal::OrBoolFct2) (Tristan Roussillon #852).
  • Geometry Package

    • Bug fix in PowerMap construction. (David Coeurjolly, #814)
    • Bug fix in 3d display of StandardDSS6Computer (Tristan Roussillon #854)
  • Topology Package

    • small fix in ImplicitDigitalSurface. (Jacques-Olivier Lachaud, #803)
    • fix examples volTrackBoundary and volScanBoundary for DEBUG mode (Jacques-Olivier Lachaud, David Coeurjolly, #851)
    • New methods to fill the interior/exterior of digital contours (in the Surface class of topology/helpers). (Bertrand Kerautret #827)
  • Graph Package

    • fix examples volDistanceTraversal for DEBUG mode (Jacques-Olivier Lachaud, David Coeurjolly, #851)
  • Image Package

    • Fixing template types in ImageAdapter (David Coeurjolly, #835)
    • Fixing image thresholders (SimpleThresholdForegroundPredicate and IntervalForegroundPredicate) which require CConstImage instead of CImage (David Coeurjolly, #843)
  • IO

    • Bug fix for reading PGM(P2) 3D. (Kacper Pluta, #853)
    • Renaming BasicColorToScalarFunctors namespace to functors:: (David Coeurjolly, #857)
    • Fix OpenGL warnings by redefining openGL primitive (glSphere) (Bertrand Kerautret #981)

=== DGtal 0.7 ===


  • Unit tests build is now disabled by default (to turn it on, run cmake with "-DBUILD_TESTING=on")

  • The "boost program option library" dependency was removed.

  • DGtal needs boost >= 1.46.

  • Thanks to new compiler warning option (-Wdocumentation), the doxygen documentation has been considerably improved.

Base Package

  • Complete rewriting of Clone, Alias and ConstAlias classes. Parameter passing is now documented with a standardized method to determine parameters unambiguously. Associated classed CowPtr, CountedPtrOrPtr and CountedConstPtrOrConstPtr are now used in conjunction with the previous classes.

  • Few improvments in Clock and Trace base classes.

Kernel Package

  • Two initialisation methods (initRemoveOneDim and initAddOneDim) for the Projector Functor from the BasicPointFunctors class in order to simplify the slice images (with example and test in 2D slice image extraction from 3D volume file).

  • New basic functors:

    • SliceRotator2D: to rotate 2D Slice images from 3D volume.
    • Point2DEmbedderIn3D: a simple functor to embed in 3d a 2d points (useful to extract 2D image from 3D volume).
  • Sets have been updated to own their domain with a copy-on-write pointer, in order to avoid some inconsistencies.

Topology Package

  • Fixing bugs in Object::isSimple for some digital topologies. Speed of Object::isSimple has been improved. Homotopic thinning is much faster (even without a precomputed simplicity table).

  • Objects have been updated to use Clone services.

Geometry Package

  • New classes to deal with arithmetical digital straight segments. Now the representation of the primitives and their recognition along a discrete structure are separated. The unique class ArithmeticalDSS, which was a segment computer, has been replaced by mainly three classes: ArithmeticalDSL, ArithmeticalDSS and ArithmeticalDSSComputer. This is described in a doc page of the geometry package. Note that Backward/Forward suffixes have been renamed into Back/Front. Moreover, get prefixes for data members accessors have been removed.

  • Generic adapter to transform a metric (model of CMetric) with monotonic (see doc) properties to a separable metric (model of CSeparableMetric) which can be used in VoronoiMap/DistanceTransformation algorithms.

  • New possibility to access the 3 2D ArithmeticDSS object within an ArithmeticDSS3d.

  • New local estimator adapter to make easy implementation of locally defined differential estimator on digital surfaces.

  • New documentation on local estimators from digital surface patches and surfel functors. New normal vector estimator from weighted sum of elementary surfel normal vectors added.

  • With an optional binding with CGAL and Eigen3, new curvature and normal vector estimators have been added. For instance, you can now estimate curvature from polynomial surface fitting (Jet Fitting) and Monge forms.

  • Minor improvements in the spherical accumulator.

  • Improvement of integral invariant estimators (better memory footprint, ...). They also allow to estimate principal curvatures using Covariance matrix. Covariance matrix is also "masks" based, so the computation is efficient.

  • New algorithms to compute the minimal characteristics of a Digital Straight Line subsegment in logarithmic time using local convex hulls or Farey Fan. Also works when the DSL characteristics are not integers.

  • Chord algorithm for (naive) plane recognition and width computation.

  • New organization for computing primitives. Introduction of the concept of PrimitiveComputer and specialization. COBA algorithm and Chord algorithm are now models of AdditivePrimitiveComputer.

  • Introduction of the primitive ParallelStrip, computed by COBA and Chord algorithms

  • New documentation for planarity decision, plane recognition and width computation. Quantitative and qualitative evaluation of COBA and Chord algorithm.

  • Bug fix in COBA algorithm when extending an empty computer with a group of points.

  • add standard plane recognition with adapter classes both for COBA and Chord algorithm.

Shape Package

  • The class MeshFromPoints was transformed into Mesh (more from shapes/fromPoints to shapes/ directory), iterators on mesh points and mesh face.

Topology Package

  • The class SCellToMidPoint is now deprecated. Use CanonicSCellEmbedder instead to map a signed cell to its corresponding point in the Euclidean space

IO Package

  • Complete refactoring of 3D viewers and boards (Viewer3D, Board3DTo2D).
  • New Board3D to export 3D displays to OBJ 3D vector format.
  • A new display of 2D and 3D image in Viewer3D.
  • New reader: HDF5 file with 2D image dataset(s) (8-bit with palette and 24-bit truecolor with INTERLACE_PIXEL).
  • New GenericReader and Generic Writer for both 2D, 3D and ND images.
  • Adding a Table Reader to extract objets given in a specific column from a text file.
  • Adding missing PPM Reader.
  • Adding missing DICOM reader (with ITK library)
  • Adding ITK reader and ITK writer
  • OpenInventor (SOQT/Coin3D) based viewer has been removed (please consider release <=0.6 if interested).

Image Package

  • New concepts : CImageFactory to define the concept describing an image factory and CImageCacheReadPolicy/CImageCacheWritePolicy to define the concept describing cache read/write policies.

  • New classes : ImageFactoryFromImage to implement a factory to produce images from a "bigger/original" one according to a given domain, ImageCache to implement an images cache with 'read and write' policies, TiledImageFromImage to implement a tiled image from a "bigger/original" one.

  • ImageContainerByITKImage complies with CImage. The container has been moved from the DGtal::experimental namespace to the main DGtal namespace.

Graph Package

  • New graph visitor, which allows to visit a graph according to any distance object (like the Euclidean distance to some point).

Math Package

  • add Histogram class and CBinner concept.
  • add math concepts diagram.

=== DGtal 0.6 ===


  • Multithread capabilities via OpenMP are now detected during DGtal build. Example of usage can be found in the Volumetric module.


  • update documentation for boost concepts, so that subconcepts are displayed and html reference pages are pointed.
  • package/module documentation files are now in their associated package folder (e.g. kernel/doc/ for kernel package related documentation pages). The "make doc" command (or "make dox", see below) generates the documentation in the "html/" sub-folder of your current build folder.
  • latex citations within doxygen documents are now working

Base Package

  • correct concept checks for some range concepts.
  • Statistic class moved to math package

Kernel Package

  • digital sets are now also point predicates, update of DigitalSetDomain accordingly. As a consequence, SetPredicate is now deprecated.

  • exposed Compare template parameter of underlying std::set in DigitalSetBySTLSet class.

  • new documentation for module digital sets.

Arithmetic Package

  • new class for representing lattice polytopes in 2D (with cut operations)
  • bugfix in LighterSternBrocot::Fraction
  • bugfix in ArithmeticalDSS (thanks, Kacper)

Image Package

  • Update on image writers (no colormap required for scalar only writers). Documentation updated.
  • New image adapters to adapt both domains and values of an image (ImageAdapter and ConstImageAdapter).
  • several enhancements of the main image concept and its image container models

Geometry Package

  • New primitives for digital plane recognition. Naive planes, and more generally planes with arbitrary axis-width can be detected and recognized incrementally. Based on a COBA algorithm implementation, which uses 2D lattice polytopes.
  • Fréchet segment computer added to compute bounded simplifications of digital curves for instance.
  • Complete rewritting of volumetric tools by separable processes: new generic algorithms (VoronoiMap, PowerMap) and metric concepts hierarchy (l_2, l_p, ...p) to efficiently compute DistanceTransformation, ReverseDistanceTransformation and preliminary medial axis extraction.
  • Separable volumetric tools are now multithread using OpenMP.
  • New curvature estimator in 2D/3D based on integral invariants (both mean and gaussian curvatures in 3D).

Shape Package

  • New operators available on digital and Euclidean shapes (Union, Intersection, Minus)

Topology Package

  • update documentation for digital surfaces and digital surface containers so as to emphasize the fact that the ranges are only single-pass.

Graph Package

  • New package gathering graph related structures and algorithms (visitors, graph concepts, ...)
  • Add concepts for graph visitors
  • Add boost::graph support for DigitalSurface
  • Add documentation for graph package.

Math Package

  • Exact exponentiation x^p by squaring on O(log p) added (BasicMathFunctions::power).

For developers

  • new "make dox" target to only build dox file documentation ("make doc" for complete documentation build)

=== DGtal 0.5.1 === Posted on June, 6th, 2012 by David Coeurjolly

  • New way to cite package/module authors in the documentation
  • Improvement of DGtal::GridCurve ranges
  • Improvement of package concepts in the documentation
  • new documentation for DGTal build on MSWindows
  • arithmetic is now a main package (previously in math)
  • Specialized classes for classical metric adjacencies

=== DGtal 0.5 === Posted on May, 9th, 2012 by David Coeurjolly

Many changes have been pushed to this release with a lot of nice tools. Before going into details component by component, we would like to focus on a couple of new cool features:

  • new arithmetic package (fractions, models of fraction, Stern-Brocot, continued fraction,...)
  • new nD DigitalSurface model (collections of (n-1) topological cells with many tools/utilities to track surface elements)
  • update of the build system to make easier the use of DGtal in your projects.
  • DGtal and DGtalTools
  • many bugfixes..
  • Overall Project

    • In previous DGtal releases, tools were given in the source "tools/" folder. In this release, we have chosen to move the tools to another GitHub project ( with a specific development process. Please have a look to this project to get nice tools built upon the DGtal library.

    • cmake scripts and DGtalConfig have been widely updated to make easier the use of the library in your own code

    • We are debugging both the code and the scripts to make it compile on windows. We still have couple of issues but most of DGtal compiles.

    • Again, efforts have been done on the documentation.

  • Package Topology:

  • Creation of the graph concept (see Doxygen documentation)

  • Graph tools have been added: breadth first visitor for any model of graph

  • Creation of high-level classes to represent several kinds of digital surfaces. Surfaces are n-1 dimensional objetcs and may be open or closed. There are several models of digital surface containers: boundary of a set of points, explicit set of surfels, boundary of a digital object defined by a predicate, frontier between two regions, light containers that are discovered on traversal but not stored explicitly, etc.

  • All these digital surfaces can be manipulated through the same object (DigitalSurface), whichever the container.

  • DigitalSurface is a model of a graph whose vertices are the surfels and whose arcs are the connections between surfels.

  • Definition of umbrellas over digital surfaces, that forms faces on the surface graph.

  • In 3D, digital surface form combinatorial 2-manifolds with boundary

  • Digital surface can be exported in OFF format

  • Several examples using digital surfaces are provided, like extracting isosurfaces from images or volume files defining surfaces in labelled images.

  • Package Algebraic (new package)
  • Definition of n-variate polynomial as a one-dimensional polynomial whose coefficients are n-1-variate polynomials. Coefficient ring and dimension are templated.

  • Creation of a reader that can transform a string representation of multivariate polynomial into such polynomial object. Use boost::spirit.

  • Example using package Topology to extract and display implicit polynomial surfaces in 3D.

  • Package Arithmetic (new package)
  • Standard arithmetic computations are provided: greatest common divisor, Bézout vectors, continued fractions, convergent.

  • Several representations of irreducible fractions are provided. They are based on the Stern-Brocot tree structure. With these fractions, amortized constant time operations are provided for computing reduced fractions.

  • An implementation of patterns and subpatterns is provided, based on the irreducible fractions.

  • A representation of digital standard line in the first quadrant is provided, as well as fast algorithms to recognize digital straight subsegments.

  • Package Image

    • Complete refactoring of Images and ImageContainers (more consistent design)

    • Documentation added

    • Graph of concepts added in the documentation

  • Package Geometry

    • New SegmentComputer (a.k.a. geometrical primitives to use for recognition, curve decomposition,...) : ArithDSS3D (3D DSS), DCA (Digital Circular Arcs), CombinatorialDSSS, ...

    • New normal vector field estimation based on elementary normal vector convolution in n-D

    • Distance Transformation by Fast Marching Method added.

  • Package IO

    • Complete refactoring of the way a DGtal object is displayed in boards/viewers.

    • New 2D board backend: you can export your drawning in TikZ for latex includes.

=== DGtal 0.4 === Posted on September 26, 2011 by David Coeurjolly

* Global changes:
   - A better decomposition of DGtal algorithms and
data structures into packages.
   - By default, DGtal is built with minimal dependencies.
   - Concepts and concept checking mechanism have been
considerably improved.

* Kernel Package: refactoring of Integer types considered in

* Topology Package: Interpixel/cellular topological model,
boundary tracking tools, ...

* Geometry Package:
  - many things have been added in the 1D contour analysis module:
multi-modal representation of 1D contours and curves (GridCurve facade),
decomposition/segmentation into primitives, many differential
estimators added, helpers for multigrid comparison of estimators
  - multigrid digital set generators from implicit and parametric
shapes in dimension 2.

* I/O Package: refactoring/enhancements of DGtal boards and
viewers,  enhancement of 2D boards with libcairo and a new
Board3Dto2D board has been added.

* Tools: multigrid shapeGenerator/contourGenerator added,
lengthEstimator/estimatorComparator  added for differential
estimator multigrid comparison, connected components extraction in
3D, ...

* Documentation: User guide has been improved thanks to a
decomposition of the library into packages.

=== DGtal 0.3.1 === Posted on April 4, 2011 by David Coeurjolly

* Quick release due to a build problem on linux. No more feature
* Preliminary cellular grid documentation added.
* Documentation cleanup.

=== DGtal 0.3.0 === Posted on April 1, 2011 by David Coeurjolly

Beside the DGtal presentation at DGCI 2011, we are pleased to announce a new DGtal release 0.3.0.

New features:

User-guide added (based on doxygen system) Kernel: new concepts and controls to enhance the Interger type management, new iterators (Range/SubRange) on HyperRectDomains. Topology: interpixel model added (cells, boundary tracking mechanisms,…) Geometry 2D: 2D curve primitive decomposition, tangential cover, convexity/concavity decomposition. Geometry nD: reverse Euclidean distance transformation Visualisation: stream mechanism to visualize 3D DGtal objects with libQGLViewer (optional) Shape generator factory added in nD

BugFixes, enhancements:

Many bugs have been fixed for this release. cmake DGtal dependency checking process is more stable now

Known problems:

For technical reasons, we haven’t be able to verify that this release also compile on Windows Visual Studio systems (see ticket #87). A new release will fix this problem as soon as possible.

=== Older Releases ===

2011-04-01 dcoeurjo * Release 0.3.0 * Kernel: global enhancement of different Integer types and associated concepts. * Topology: interpixel topology, cells, surface tracking * Geometry2D: contour primitive decomposition, tangential cover, convexity/concavity decomposition. * GeometrynD: Reverse DT transformation (Euclidean) * Infrastructure: 3D visualisation of DGtal objects with libQGLViewer, shape factory * IO: PointListReader added * Documentation: first DGtal user-guide

2010-01-12 dcoeurjo * Release 0.2 * Kernel: DGtalBoard mechanism for 2D drawing of DGtal objects, .. * Geometry package - Volumetric: distance transformation with separable metric (l2, l1 and linfinity) in arbitrary dimension - 2D: Arithmetical DSS, Greedy decomposition of a contour into primitives, FreemanChain code iterators * Topolopy package: Set, Adjacencies, Object, border extraction, connected components computation, ... * IO: 2D file formats with Magick++, Vol/Raw format in 3D, Raw format in n-D (non-portable) * Misc: Compiles on linux, MacOS and VisualStudio 2008

2010-21-05 dcoeurjo * Iterators added to PointVector

  • Debug methods removed in Trace class
  • Many bug fixes for VS compatibility

2010-05-15 dcoeurjo

  • Assert.h: added macro ASSERT() added based on the boost/assert.hpp (TODO: implement a nice callback)
  • Point and Vector templated classes added
  • Space.*: skeleton of a DGtal::Space added

2010-03-03 dcoeurjo * math/MeasureOfStraightLines: new class to compute the measure of a set of Straight lines defined as a polygon in the (a,b) parameter space. * test_measure: added

2010-02-17 dcoeurjo

  • Trace: new class models for output streams in Trace class.
  • TraceWriter/TraceWriterTerm/TraceWriterFile: added

2010-02-12 dcoeurjo

  • models: bug fix in INLINE commands
  • Trace/Clock: minor edit and bug report

2010-01-05 dcoeurjo

  • Trace can be initialized on diffrent output stream (e.g. std::cerr or a file stream)
  • test_trace: update to test the new API

2010-01-04 dcoeurjo

  • Clock: no more static variables and methods (in order to have several running clocks)
  • Trace: new interface and the endBlock displays and returns the ellapsed time within the block

2009-12-28 dcoeurjo

  • Trace: a new class to trace out messages to the standard output. Four type of messages are possible: info, debug, error and "emphased". On color linux terminal, messages appears with an appropriate color foreground.
  • test_trace: an illustration of the Trace interface

2009-12-14 dcoeurjo

  • CMakeLists, test_clock updates to ensure compatibility with VisualStudio
  • New cmake options
  • OPTION(BUILD_SHARED_LIBS "Build shared libraries." ON)
  • OPTION(BUILD_TESTS "Build tests." ON)

2009-12-11 dcoeurjo * CMakeLists scripts and first backport from imagene (Clock class)

2009-12-11 dcoeurjo * Repository cleanup: - Modeles and removed - JOL scripts & templates added

2009-12-03 dcoeurjo * Modeles: class templates added with script