Skip to content
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
Cannot retrieve contributors at this time

DIPlib 3

Build Status CodeQL

The DIPlib project contains:

  • DIPlib, a C++ library for quantitative image analysis. It has been in development at Delft University of Technology in The Netherlands since 1995. The 3.0 release of DIPlib represented a complete rewrite in modern C++ of the library infrastructure, with most of the image processing and analysis algorithms ported from the previous version, and some of them improved significantly. Read the DIPlib documentation.

  • DIPimage, a MATLAB toolbox for quantitative image analysis. It has been in development at Delft University of Technology in The Netherlands since 1999. Read the DIPimage User Manual.

  • PyDIP, Python bindings to DIPlib. This is currently a thin wrapper that exposes the C++ functionality with little change. Read the PyDIP User Manual.

  • DIPviewer, an interactive image display utility. It is usable from C++, Python and MATLAB programs. Within DIPimage this is an optional alternative to the default MATLAB-native interactive display utility. Read the DIPviewer documentation.

  • DIPjavaio, an interface to OME Bio-Formats, a Java-based library that reads hundreds of image file formats. This module is usable from C++ and Python (DIPimage interfaces to Bio-Formats natively). Read the DIPjavaio documentation

See the DIPlib website for more information.

Building and using the project

To build the library you will need a C++14 compliant compiler and CMake. See Building the DIPlib library for detailed instructions.

When linking against the DIPlib library without using CMake, it is important to set a few preprocessor macros. See Linking against the DIPlib library for details.


Reporting a bug

We use the issue tracker on GitHub to manage bug reports. See for instructions on how to report a bug.

Bug fixes, algorithm improvements, new algorithms

Feel free to submit a pull request on GitHub. Please follow our style guide and make sure to read first.

Documentation, tutorials

Documentation can always be improved (also, PyDIP has hardly any at all!). If you want to help write documentation, or create tutorials for how to use the library, read, then submit a pull request on GitHub.

If you found an error in the documentation, we consider this a bug. See above how to report it.


Copyright 2014-2022 Cris Luengo and contributors
Copyright 1995-2014 Delft University of Technology

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this library except in compliance with the License. You may obtain a copy of the License at
(or see the LICENSE.txt file in this distribution)

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

DIPlib includes the following libraries / external code:

  • Eigen 3
    Copyright 2008 Gael Guennebaud
    Copyright 2007-2011 Benoit Jacob
    Mozilla Public License Version 2.0
    see dependencies/eigen3/LICENSE.txt
    (we do not use any of the components with more restrictive licenses)

  • DocTest (its use can be disabled)
    Copyright 2016-2019 Viktor Kirilov
    MIT License
    see dependencies/doctest/LICENSE.txt

  • PocketFFT
    Copyright 2010-2021 Max-Planck-Society
    Copyright 2019-2020 Peter Bell
    3-Clause BSD License
    see dependencies/pocketfft/

  • PCG Random Number Generation for C++
    Copyright 2014-2017 Melissa O'Neill and the PCG Project contributors
    Apache 2.0 License, or The MIT License, at your option
    see include/diplib/private/pcg_*.hpp

  • robin-map, a fast hash map and hash set
    Copyright 2017 Thibaut Goetghebuer-Planchon
    MIT License
    see include/diplib/private/robin_*.h

  • A fast 2D labeling algorithm out of YACCLAB
    Copyright 2016-2017 Costantino Grana, Federico Bolelli, Lorenzo Baraldi and Roberto Vezzani
    3-Clause BSD License
    see src/regions/labelingGrana2016.h

  • A few color maps from colorcet
    Copyright 2017 Peter Kovesi
    1-Clause BSD-like License
    see src/display/colormap.cpp (about half-way down the file)

  • Glyph images obtained by rendering the Open Sans font
    Unknown copyright, designed by Steve Matteson
    Apache 2.0 License
    see src/generation/draw_text_builtin.cpp or Google Fonts

  • libics (its use can be disabled)
    Copyright 2015-2017 Scientific Volume Imaging Holding B.V.
    Copyright 2000-2013 Cris Luengo and others
    GNU Lesser General Public License, Version 2.1
    see dependencies/libics/GNU_LICENSE

  • LibTIFF (its use can be disabled)
    Copyright 1988-1997 Sam Leffler
    Copyright 1991-1997 Silicon Graphics, Inc.
    2-Clause BSD-like Licence
    see dependencies/libtiff/COPYRIGHT

  • zlib (used by libics and LibTIFF, its use can be disabled)
    Copyright 1995-2017 Jean-loup Gailly and Mark Adler
    zlib Licence
    see dependencies/zlib/LICENSE.txt

  • libjpeg (its use can be disabled)
    Copyright 1991-2018, Thomas G. Lane, Guido Vollbeding
    Custom BSD-like Licence
    see dependencies/libjpeg/README

  • pybind11 (only used in the Python bindings)
    Copyright 2016 Wenzel Jakob
    3-Clause BSD License
    see dependencies/pybind11/LICENSE

  • python-javabridge (only used in the Python bindings)
    Copyright 2003-2009 Massachusetts Institute of Technology
    Copyright 2009-2013 Broad Institute
    3-Clause BSD License
    see pydip/src/

  • A few MATLAB scripts from OME Bio-Formats (used in DIPimage)
    Copyright 2012-2021 Open Microscopy Environment
    2-Clause BSD License
    see dipimage/private/bf*.m
    (the full Bio-Formats library needs to be installed for these to be useful)

  • Modified CSS files from dox++, which originally came from m.css (for documentation)
    Copyright 2017, 2018, 2019 Vladimír Vondruš
    MIT License

Note that all of these have permissive open-source licenses similar in spirit to the Apache License.

DIPlib also optionally links against:

  • FFTW3 (as installed on your system, not used by default)
    Copyright 2003, 2007-14 Matteo Frigo
    Copyright 2003, 2007-14 Massachusetts Institute of Technology
    GNU General Public License, Version 2 (not compatible with the Apache License)

  • FreeType 2 (as installed on your system, not used by default)
    Copyright 1996-2021 David Turner, Robert Wilhelm, and Werner Lemberg
    FreeType License (BSD style)

DIPviewer links against the following libraries:

  • FreeGLUT (as installed on your system, alternative to GLFW)
    Copyright 1999-2000 Pawel W. Olszta
    X-Consortium license

  • GLFW (as installed on your system, alternative to FreeGLUT)
    Copyright 2002-2006 Marcus Geelnard
    Copyright 2006-2011 Camilla Berglund
    BSD-like license

  • OpenGL (as installed on your system)
    (free from licensing requirements)

DIPjavaio links against:

  • JDK 8 (as installed on your system)
    Copyright, probably Sun and/or Oracle
    GNU General Public License, Version 2 (not compatible with the Apache License)

  • OME Bio-Formats (optional, as installed on your system)
    Copyright 2012-2017 Open Microscopy Environment
    GNU General Public License, Version 2 (not compatible with the Apache License)

Note that OME Bio-Formats is optional, but DIPjavaio is currently useless without it. The DIPjavaio sources provided with this project are shared under the same licence as the rest of the project (Apache 2.0), but by linking with Bio-Formats, your whole program will become GPL. This module is not suitable for use in commercial, closed-source software.