0.31.0

• all
  • update to OpenCV 4.6.0
• build
  • Switch to Github Actions for Linux CI build
  • Use go -tags static when verifying static build
• core
  • Add Mat.ElemSize (#964)
  • avoid index out of range panic in NewPointsVectorFromPoints
• video
  • add findTransformECC function
• contrib/ximgproc
  • add PeiLinNormalization() function
  • add anisotropicDiffusion() function
  • implement edgePreservingFilter()
  • implement niBlackThreshold and thinning filters

0.30.0

• all
  • update to OpenCV 4.5.5
• build
  • add install_nonfree make task to build all opencv_contrib modules
  • correct download location for onnx test file
  • Update Makefile for missing version changes
• core
  • correct how memory is being allocated for Eye(), Zeros(), and Ones() to address issue #930
• calib3d
  • Adding support for estimateAffine2DWithParams (#924)
• imgproc
  • Add DrawContoursWithParams function
• photo
  • Add bindings for fastNlMeansDenoising and fastNlMeansDenoisingColored
  • add detailEnhance function
  • add EdgePreservingFilter function
  • add PencilSketch function
  • add stylization function
• docs
  • add godoc comments for FastNlMeansDenoising functions
  • update README with info on latest mingw-w64 t use for Windows builds
  • dnn pose detect examples correct the order of the argument variable name
• examples
  • Fixed memory leaks in the motion detection example
• openvino
  • Update env.sh and README.md
• windows
  • use mingw-w64 8.1.0 for protobuf compile
• contrib
  • add cv::wechat_qrcode::WeChatQRCode (#949)
  • Update cgo_static.go

0.29.0

• all
  • update to OpenCV 4.5.4
• build
  • add static build ability on windows
  • use tbb for all builds for CPU accelerated operations
• cuda
  • implement a bunch of per-element operations
  • add get/set/reset device functions
  • add NewGpuMatWithSize() to preallocate device memory
  • Reshape() returns a new GpuMat with the changed data
  • correct use of Stream by adding WaitForCompletion() and passing pre-allocated GpuMats
• docs
  • update ROADMAP from recent contributions
• videoio
  • Fix open video capture with api test (#895)
• calib3d
  • added EstimateAffine2D
  • findChessboardCornersSB
• aruco
  • added many functions as part of initial implementation

0.28.0

• all
  • update to OpenCV 4.5.3
  • make task and build tag for static build of OpenCV/GoCV on Linux
  • add Makefile tasks for OpenCV install on Nvidia Jetson
  • add gotest for more colorful test output running tests from containers
• build
  • correcting output format for code coverage report
  • enforce rule that all Go code is correctly formatted
  • remove codecov
• core
  • add NewPointVectorFromMat() and NewPoint2fVectorFromMat() functions
  • Fix possible MatProfile race by ordering remove before free.
• cuda
  • add core functions for GpuMat like Cols(), Rows(), and Type()
  • initial implementation for the Flip function
• docs
  • update ROADMAP from recent contributions
• examples
  • correct list of examples and fix comment
• features2d
  • Add NewORBWithParams
• tracking
  • change MOSSE to KCF
• highgui
  • Add function CreateTrackbarWithValue to Window type.
• imgcodec
  • optimize IMEncode avoiding multiple data copies.
• imgproc
  • Add CircleWithParams function
  • Add DilateWithParams() function (#827)
  • Add EllipseWithParams function
  • Add FillPolyWithParams function
  • Add PointPolygonTest function
  • Add RectangleWithParams function
• photo
  • add MergeMertens, AlignMTB and Denoising function (#848)
• xphoto
  • Add Xphoto contrib (#844)

v0.27.0

• all
  • update to OpenCV 4.5.2
• core
  • add Append() to PointsVector/PointVector
  • add cv::RNG
  • add implementation for Point2fVector
  • add rand functions
  • add test coverage for PointsVector
  • create new PointsVector/PointVector wrappers to avoid repetitive memory copying for seeming innocent operations involving slices of image.Point
  • test coverage for Point2f
  • use PointVector for everything that we can to speed up pipeline when passing around Point vectors
  • use enum instead of int for Invert Method
• cuda
  • adding HoughLinesDetector and HoughSegmentDetector
  • adding tests for the CannyEdgeDetector
  • some refactoring of the API
  • adding dockerfiles for OpenCV 4.5.2 with CUDA 11.2
  • add GaussianFilter
  • correct signature and test for Threshold
  • implement SobelFilter
  • move arithm module functions into correct location
  • rename files to get rid of so many cudas
  • add abs function implementation
• dnn
  • increase test coverage
• docker
  • make all Dockerfiles names/tags more consistent
• docs
  • add CUDA functions that need implementation to ROADMAP
  • remove invalid sections and add some missing functions from ROADMAP
• imgproc
  • Add FindContoursWithParams function
  • Add ToImageYUV and ToImageYUVWithParams
• make
  • add make task to show changelog for next release
• wechat_qrcode
  • disable module in Windows due to linker error

v0.26.0

• all
  • update to OpenCV 4.5.1
• core
  • add Matrix initializers: eye, ones, zeros (#758)
  • add multidimensional mat creation
  • add ndim mat constructor
  • added accumulators
  • added norm call with two mats (#600)
  • keep a reference to a []byte that backs a Mat. (#755)
  • remove guard for DataPtrUint8 since any Mat can be treated an Uint8
  • add Mat IsContinuous() function, and ensure that any Mat data pointers used to create Go slices only apply to continuous Mats
  • fix buffer size for Go strings for 32-bit operating systems
• build
  • bring back codecov.io
• calib3d
  • correctly close mat after test
• dnn
  • add ReadNetFromONNX and ReadNetFromONNXBytes (#760)
  • increase test coverage
• docker
  • dockerfiles for opencv gpu builds
• docs
  • corrected links to CUDA and OpenVINO
  • list all unimplemented functions in photo module
  • replace GoDocs with pkg docs
  • update ROADMAP from recent contributions
• imgproc
  • add test coverage for GetTextSizeWithBaseline()
  • close all Mats even those based on memory slices
  • close Mat to avoid memory leak in ToImage()
  • refactoring of ToImage and ImageToMatXX functions
• openvino
  • fix dldt repo in makefile for openvino
• os
  • adding gcc-c++ package to rpm deps
• photo
  • add SeamlessClone function
• profile
  • add created mats in Split and ForwardLayers to profile (#780)

v0.25.0

• all
  • update to opencv release 4.5.0
• build
  • add file dependencies needed for DNN tests
  • add verbose output for tests on CircleCI
  • also run unit tests on non-free algorithms. YMMV.
  • fix build with cuda
  • remove Travis and switch to CircleCI using Docker based builds
  • update CI builds to Go 1.15
• core
  • add mixChannels() method to Mat (#746)
  • Add toGoStrings helper
  • support ConvertToWithParams method
• dnn
  • Add NMSBoxes function (#736)
  • Added ability to load Torch file. Tested features for extracting 128d vectors
  • fix using wrong type for unconnectedlayertype
  • use default ddepth for conversions to blob from image as recommended by @berak
• docker
  • use separate dockerfile for opencv to avoid massive rebuild
• docs
  • add recent contributions to ROADMAP and also add cuda functions still in need of implementation
  • display CircleCI badge in README
  • minor improvements to CUDA docs in READMEs
• features2d
  • add FlannBasedMatcher
  • add drawmatches (#720)
  • fix memory leak in SIFT
• highgui
  • refactored ROI methods
• imgproc
  • Add option to return baseline with GetTextSizeWithBaseline
• objdetect
  • Add QRCode DetectAndDecodeMulti
• videoio
  • Add video capture properties and set preferred api backend (#739)
  • fix needed as discussed in golang/go issue #32479

v0.24.0

• all
  • update Makefile and README
  • change constants and corresponding function signatures to have the correct types (#689)
  • replace master branch terminology with release
  • update to OpenCV 4.4.0
• calib3d
  • add FindHomography()
  • add function EstimateAffinePartial2D()
  • add GetAffineTransform() and GetAffineTransform2f()
  • add UndistortPoints(), FisheyeUndistortPoints() and EstimateNewCameraMatrixForUndistortRectify()
• core
  • add MultiplyWithParams
• docs
  • add recent contributions to ROADMAP
  • create CODE_OF_CONDUCT.md
  • update copyright year
• features2d
  • close returned Mat from SIFT algorithm
  • fix issue 707 with DrawKeyPoints
  • SIFT patent now expired so is part of main OpenCV modules
• imgproc
  • change struct to remove GNU old-style field designator extension warning

v0.23.0

• build
  • update Makefile and README
  • update to use go1.14
• calib3d
  • add draw chessboard
• core
  • fix memory leak in Mat.Size() and Mat.Split() (#580)
• cuda
  • add build support
  • add cuda backend/target
  • add support for:
    • cv::cuda::CannyEdgeDetector
    • cv::cuda::CascadeClassifier Class
    • cv::cuda::HOG Class
  • remove breaking case statement
• dnn
  • avoid parallel test runs
  • remove attempt at providing grayscale image blog conversion that uses mean adjustment
• docker
  • docker file last command change (#505)
• docs
  • add recent contributions to ROADMAP
• imgproc
  • add ErodeWithParams function
  • add getGaussianKernel function
  • add Go Point2f type and update GetPerspectiveTransform() (#589)
  • add PhaseCorrelate binding (#626)
  • added Polylines feature
  • do not free contours data until after we have drawn the needed contours
  • Threshold() should return a value (#620)
• make
  • added raspberry pi zero support to the makefile
• opencv
  • update to OpenCV 4.3.0
• openvino
  • add build support
• windows
  • add cmake flag for allocator stats counter type to avoid opencv issue #16398

v0.22.0

• bgsegm
  • Add BackgroundSubtractorCNT
• calib3d
  • Added undistort function (#520)
• core
  • add functions (singular value decomposition, multiply between matrices, transpose matrix) (#559)
  • Add new funcs (#578)
  • add setIdentity() method to Mat
  • add String method (#552)
  • MatType: add missing constants
• dnn
  • Adding GetLayerNames()
  • respect the bit depth of the input image to set the expected output when converting an image to a blob
• doc
  • change opencv version 3.x to 4.x
• docker
  • use Go1.13.5 for image
• imgcodecs
  • Fix webp image decode error (#523)
    imgcodecs: optimize copy of data used for IMDecode method
• imgproc
  • Add GetRectSubPix
  • Added ClipLine
  • Added InvertAffineTransform
  • Added LinearPolar function (#524)
  • correct ksize param used for MedianBlur unit test
  • Feature/put text with line type (#527)
  • FitEllipse
  • In FillPoly and DrawContours functions, remove func() wrap to avoid memory freed before calling opencv functions. (#543)
• objdetect
  • Add support QR codes
• opencv
  • update to OpenCV 4.2.0 release
• openvino
  • Add openvino async
• test
  • Tolerate imprecise result in SolvePoly
  • Tolerate imprecision in TestHoughLines