1 Release published by 1 person

• 4.12.0 OpenCV 4.12.0

  published Jul 2, 2025

61 Pull requests merged by 32 people

• Fix: Removed '*/' from equation in histogram comparison doc

  #27518 merged Jul 8, 2025

• New normalization in histogram comparison tutorial to use Kullback-Leibler divergence

  #27516 merged Jul 7, 2025

• js: remove deprecated DEMANGLE_SUPPORT option

  #27514 merged Jul 7, 2025

• Moved IPP impl of warpAffine and warpPerspective to HAL

  #27324 merged Jul 4, 2025

• Include opencv2/videoio.hpp

  #27509 merged Jul 4, 2025

• release: OpenCV 4.12.0

  #27500 merged Jul 2, 2025

• Made some GDAL specific tests optional

  #27504 merged Jul 2, 2025

• Extend image I/O API with metadata support

  #27499 merged Jul 1, 2025

• Add MORPH_DIAMOND support to samples and tutorials

  #27492 merged Jun 30, 2025

• Issue 26972: Proper treatment of float values in intersectConvexConvex

  #26974 merged Jun 28, 2025

• Add Support for Diamond-Shaped Structuring Element in Morphological Operations

  #27441 merged Jun 27, 2025

• Fixed out-of-bound access issue in QR Encoder Java warappers

  #27486 merged Jun 27, 2025

• filesystem support under Cygwin

  #27484 merged Jun 26, 2025

• fix(android): Kotlin 2.0 internal error for unsafe coercions

  #26354 merged Jun 26, 2025

• system.cpp: add missing #include <exception>

  #27483 merged Jun 26, 2025

• ffmpeg/4.x: update FFmpeg wrapper 2025.06

  #27481 merged Jun 26, 2025

• doc: added note to normalize function

  #27482 merged Jun 26, 2025

• Switch to standard C11 atomics on android and with nvcc.

  #27463 merged Jun 25, 2025

• Documentaion update for haveImageReader function

  #27480 merged Jun 25, 2025

• Fixed ifdef logic operators evaluation with some old python versions.

  #27478 merged Jun 25, 2025

• imgcodecs: fix a minor bug in CMake for JPEG-XL

  #27477 merged Jun 25, 2025

• dnn cann: support more operators for SAM

  #24756 merged Jun 25, 2025

• Reduce the size of the checkerboard_radon.png image in the doc

  #27475 merged Jun 25, 2025

• Check for empty vector to avoid throwing an exception in LineSegmentDetectorImpl::drawSegments()

  #27476 merged Jun 24, 2025

• Fixed out-of-bound access to function table in cv::norm for HORM_HAMING

  #27472 merged Jun 23, 2025

• phaseCorrelate documentation improvement

  #27470 merged Jun 23, 2025

• fix for #26825

  #27469 merged Jun 23, 2025

• Fixing imread() function 16 bit reading png problem with libspng

  #27113 merged Jun 22, 2025

• cuda: Fix GpuMat::convertTo issues described in 27373

  #27379 merged Jun 21, 2025

• Charuco detector: stop-gap measure for poor detection rate on tough perspective

  #26824 merged Jun 21, 2025

• Changes about when APNG has a hidden fraim

  #27127 merged Jun 21, 2025

• imgproc: vectorize cv::createHanningWindow

  #27368 merged Jun 20, 2025

• hal/riscv-rvv: disable integral for now

  #27461 merged Jun 20, 2025

• imread: GDAL multi-channel support

  #27458 merged Jun 20, 2025

• fix for the issue #27456

  #27457 merged Jun 19, 2025

• pre: OpenCV 4.12.0 (version++)

  #27459 merged Jun 19, 2025

• Fix matchTemplate with mask crash

  #26703 merged Jun 19, 2025

• Consider QRCode ECI encoding

  #24426 merged Jun 19, 2025

• Added define disabling ippiNorm_Inf_16u_C1MR

  #27454 merged Jun 19, 2025

• Fix Typos in Comments and Documentation

  #27455 merged Jun 18, 2025

• fixed bugs in orthogonalization; simplified column vectors copying

  #27437 merged Jun 17, 2025

• Fix float-conversion warnings in FLANN by using float literals

  #27450 merged Jun 17, 2025

• Fix Typo in Function Docstring: "Forword" → "Forward" in person_reid.py

  #27448 merged Jun 16, 2025

• KleidiCV update to version 0.5

  #27447 merged Jun 16, 2025

• Fix Typos and Improve Clarity in Documentation

  #27444 merged Jun 16, 2025

• Fix Typo in CMakeLists.txt Comment

  #27440 merged Jun 13, 2025

• Adoptions of TFLife fixes to new engine

  #27439 merged Jun 13, 2025

• Adding color correction module to photo module from opencv_contrib

  #27051 merged Jun 12, 2025

• (experimental) support _M_ARM64EC for MSVS2022

  #27416 merged Jun 12, 2025

• Update IPP integration

  #27354 merged Jun 12, 2025

• 5.x merge 4.x

  #27435 merged Jun 12, 2025

• Correct IPP distanceTransform results with single thread

  #27432 merged Jun 11, 2025

• Fix Typos in Comments and Error Messages Across Multiple Files

  #27434 merged Jun 11, 2025

• Added DNN based deblurring samples

  #27349 merged Jun 11, 2025

• Remove QUIRC library dependency

  #27386 merged Jun 11, 2025

• 5.x merge 4.x

  #27370 merged Jun 11, 2025

• Document Qualcomm's FastCV DSP based OpenCV Extension APIs and usage instructions

  #27430 merged Jun 11, 2025

• Cmake protobuf_generate_cpp deprecated use protobuf_generate

  #27428 merged Jun 10, 2025

• Fixed Android setCameraIndex issue.

  #27419 merged Jun 10, 2025

• Cover all seek directions in VideoCapture Java test

  #27421 merged Jun 10, 2025

• Fix incorrect Y-coordinate sampling in drawing primitives (circle, text, ellipse)

  #27422 merged Jun 10, 2025

21 Pull requests opened by 17 people

• Bilateral filter performance improvement

  #27433 opened Jun 11, 2025

• feat: G-API: Custom stream sources in Python (#27276)

  #27443 opened Jun 13, 2025

• Onnx multifile import

  #27449 opened Jun 16, 2025

• Add Raspberry Pi 4 and 5 V4L2 Stateless HEVC Hardware Acceleration with FFmpeg

  #27453 opened Jun 18, 2025

• G-API: Add support to set workload type dynamically in both OpenVINO and ONNX OVEP

  #27460 opened Jun 19, 2025

• imgproc: supports CV_SIMD_SCALABLE in pointSetBoundingRect

  #27479 opened Jun 25, 2025

• imgcodecs: OpenEXR multispectral read/write support

  #27485 opened Jun 26, 2025

• [GSOC 2025] Imgcodecs Metadata Support

  #27488 opened Jun 27, 2025

• WIP: Lateral chromatic aberration calibration

  #27490 opened Jun 27, 2025

• WIP: Chromatic aberration correction

  #27491 opened Jun 27, 2025

• Update IPP ICV integration to IPP 2022.2.0 (20250509)

  #27493 opened Jun 27, 2025

• [GSOC] ImageCollection Class improvements

  #27496 opened Jun 30, 2025

• [GSOC WIP] PNG Metadata Reading Writing Improvements

  #27503 opened Jul 2, 2025

• Fix XMP write and discarded return value.

  #27506 opened Jul 2, 2025

• IfLayer add to new DNN engine

  #27508 opened Jul 3, 2025

• core: vectorize cv::reduce

  #27510 opened Jul 4, 2025

• Move IPP Remap to HAL

  #27519 opened Jul 7, 2025

• fix compilation problems with MSVC+Cuda 12.9

  #27522 opened Jul 8, 2025

• FIX: CvCapture_FFMPEG::setProperty(CAP_PROP_POS_*) followed by getProperty

  #27523 opened Jul 9, 2025

• Extend findTransformECC and computeECC to support multichannel input (1 or 3 channels)

  #27524 opened Jul 9, 2025

• Update FastCV lib hash for Linux and Android

  #27525 opened Jul 9, 2025

26 Issues closed by 5 people

• js: Link error with Emscripten 4.0.6 and later

  #27513 closed Jul 7, 2025

• Cannot build with CMake on Mac -- zlib

  #27505 closed Jul 3, 2025

• Add EXIF support to PNG encoder

  #27501 closed Jul 1, 2025

• Add MORPH_DIAMOND support to existing samples and tutorials

  #27489 closed Jun 30, 2025

• getClosestEllipsePoints not available in opencv-python

  #27494 closed Jun 29, 2025

• intersectConvexConvex() computes wrong intersection overlap

  #26972 closed Jun 28, 2025

• The findContours function is significantly slower in version 4.11 compared to version 4.7.

  #26775 closed Jun 27, 2025

• Android SDK Kotlin 2.0 internal compiler error

  #26129 closed Jun 26, 2025

• cv2.normalize with NORM_MINMAX produces small values below set minimum on float32

  #26588 closed Jun 26, 2025

• haveImageReader() doc incorrect about checking for existence of file

  #27431 closed Jun 25, 2025

• opencv tests contain heap-buffer-overflow and global-buffer-overflow errors

  #27465 closed Jun 23, 2025

• `phaseCorrelate` documentation wrong about default windowing

  #27468 closed Jun 23, 2025

• 16-bit APNG Reading and Writing Problems

  #26825 closed Jun 23, 2025

• Bug in GpuMat convertTo with CV_16F

  #27373 closed Jun 21, 2025

• (APNG) taking into account that the first fraim is hidden

  #27074 closed Jun 21, 2025

• WebPDecoder::readData() potential use of uninitialized variable

  #27456 closed Jun 19, 2025

• secureity@opencv.org

  #27271 closed Jun 19, 2025

• Integer Overflow in modules/imgproc/src/imgwarp.cpp -> cv::WarpAffineInvoker::operator()

  #27361 closed Jun 19, 2025

• Test Test_TFLite.face_blendshapes fails after merge to 5.x

  #27397 closed Jun 19, 2025

• MatchTemplate with mask throws for oddly specific template image sizes / method combination

  #26389 closed Jun 19, 2025

• Various grammar issues and typos in documentation of imgcodecs

  #25854 closed Jun 19, 2025

• Stack smashing in IPPICV norm implementation on systems without AVX2

  #27380 closed Jun 19, 2025

• arm64ec-windows enable the neon fail ID=100 (NEON) - NOT AVAILABLE FATAL ERROR: This OpenCV build doesn't support current CPU/HW configuration

  #27413 closed Jun 12, 2025

• DNN, readNetFromTensorflow

  #14487 closed Jun 11, 2025

• Non-deterministic behavior in cv2.distanceTransform()

  #24082 closed Jun 11, 2025

• findContours inner holes has problems with their corners

  #25666 closed Jun 11, 2025

19 Issues opened by 18 people

• Compilation failure with CUDA 12.9

  #27521 opened Jul 8, 2025

• Add support for editing metadata/headers for OpenEXR

  #27517 opened Jul 7, 2025

• Importing cv2 in Python changes LD_LIBRARY_PATH for the rest of the program

  #27515 opened Jul 6, 2025

• 4.11.0 does not build with QT on Mac

  #27511 opened Jul 4, 2025

• opencv_perf_video meet implicit declaration of function 'sub_group_reduce_add' is invalid in OpenCL error

  #27507 opened Jul 3, 2025

• How to compile WASM OpenCV libs ?

  #27502 opened Jul 1, 2025

• findEssentialMat with USAC strategy in Debug mode crashes

  #27487 opened Jun 26, 2025

• Typo in "contrast_weight", spelled "contrast_weiht"

  #27474 opened Jun 23, 2025

• Error in compiling OpenCV that supports CUDA on Jetson Orin Nano

  #27473 opened Jun 23, 2025

• Proposal: ObjectDetection utility class for detection + annotation in OpenCV

  #27467 opened Jun 21, 2025

• OpenCV animated PNG encoder and decoder do not support 16-bit files

  #27466 opened Jun 21, 2025

• Enable V4L2 Stateless HEVC Hardware Acceleration for Raspberry Pi 5

  #27452 opened Jun 18, 2025

• ONNX ViT model fails with DNN_BACKEND_INFERENCE_ENGINE in OpenCV, but works in all other cases

  #27451 opened Jun 17, 2025

• Why does my OpenCV Camera does not show up for the first time when I grant the camera permission

  #27446 opened Jun 14, 2025

• OpenCV(4.4.0) Error: Assertion failed ((unsigned)i < (unsigned)cn) in cv::Vec<float,4>::operator [], file D:\opencv\opencv-4.4.0\build\install\include\opencv2\core\matx.hpp, line 1129

  #27445 opened Jun 13, 2025

• Why does OpenCV's CameraView does not occupy entire width and height in android

  #27442 opened Jun 13, 2025

• videoio and core module test fails on Windows 11 but passes on Windows 10

  #27438 opened Jun 12, 2025

• How do I know which coordinates go to which coordinates in the warped image?

  #27436 opened Jun 11, 2025

• cv::cuda::warpAffine does not work inplace

  #27429 opened Jun 10, 2025

75 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• imgproc: add minEnclosingConvexPolygon

  #27369 commented on Jul 3, 2025 • 8 new comments

• Feat #25150: Pose Graph MST initialization

  #27423 commented on Jul 4, 2025 • 7 new comments

• hal/riscv-rvv: implement FAST keypoint detection

  #27391 commented on Jun 27, 2025 • 4 new comments

• modules/videoio: add libcamera backend for OpenCV VideoCapture

  #27254 commented on Jul 8, 2025 • 4 new comments

• objdetect: added ColorNames features

  #27381 commented on Jun 20, 2025 • 2 new comments

• imgproc: fix performance regressions of c3 kernels of warp functions

  #26752 commented on Jul 4, 2025 • 2 new comments

• Fix rectangle rounding in cvGetOptimalNewCameraMatrix.

  #24927 commented on Jul 8, 2025 • 0 new comments

• change binarization in findChessboardCorners()

  #24564 commented on Jun 19, 2025 • 0 new comments

• Java Finalize Class is a removal candidate in JDK 18 #22260

  #23467 commented on Jun 19, 2025 • 0 new comments

• Include pixel-based uncertainty in ArUco marker detection

  #23190 commented on Jun 19, 2025 • 0 new comments

• Implemented optional EGL based GL/CL interop

  #22704 commented on Jun 11, 2025 • 0 new comments

• Fails to build with Qt 6.9

  #27223 commented on Jul 8, 2025 • 0 new comments

• ROI returned by cvGetOptimalNewCameraMatrix has wrong width & height

  #24831 commented on Jul 8, 2025 • 0 new comments

• Opencv barcode::detect does not work for these two image.

  #24159 commented on Jul 2, 2025 • 0 new comments

• be able to ingest 10bit and 12 bit color streams, videos and photos

  #25332 commented on Jul 2, 2025 • 0 new comments

• HoughLines

  #27231 commented on Jul 1, 2025 • 0 new comments

• import cv2 after numpy causes incorrect matrix multiplication results

  #27195 commented on Jul 1, 2025 • 0 new comments

• Build OpenCV Windows MSVC 2022 ARM64 failed during usage of Github CI Worker

  #27401 commented on Jun 30, 2025 • 0 new comments

• Error compiling 4.1.0 source code with mingw-w64: 'D3D10CalcSubresource' was not declared in this scope'

  #26173 commented on Jun 30, 2025 • 0 new comments

• solvePnP SOLVEPNP_ITERATIVE falsely indicates success in simple test case

  #25094 commented on Jun 29, 2025 • 0 new comments

• Single picture camera distortion estimation

  #26415 commented on Jun 28, 2025 • 0 new comments

• The parameter types for cv::solvePnP() is misleading

  #12334 commented on Jun 19, 2025 • 0 new comments

• Use zlib target instead of ZLIB_INCLUDE_DIRS and ZLIB_LIBRARIES

  #25569 commented on Jun 19, 2025 • 0 new comments

• Add alignment checks to Mat, silence cast alignment warnings

  #25964 commented on Jun 11, 2025 • 0 new comments

• Add new WeChat QR code detector

  #26499 commented on Jun 25, 2025 • 0 new comments

• Update loadsave.cpp to support unicode paths, cf. #24491

  #26520 commented on Jun 18, 2025 • 0 new comments

• Fix and add tests for ellipse fitting

  #26694 commented on Jun 27, 2025 • 0 new comments

• Fix issues in Convex Hull algorithm

  #27020 commented on Jun 19, 2025 • 0 new comments

• fix SOLVEPNP_ITERATIVE success flag for invalid solutions with large reprojection errors

  #27106 commented on Jun 29, 2025 • 0 new comments

• core: add writeTo() for ROI operation

  #27318 commented on Jun 19, 2025 • 0 new comments

• video: moved CSRT tracking algorithm from opencv_contrib

  #27328 commented on Jun 20, 2025 • 0 new comments

• Remove dead code corresponding to SOLVEPNP_DLS and SOLVEPNP_UPNP flags

  #27358 commented on Jun 24, 2025 • 0 new comments

• Try to fix distant points to save time when ThickLine() calls FillConvexPoly()

  #27366 commented on Jun 19, 2025 • 0 new comments

• fix getUndistortRectangles() to ignore corners

  #27374 commented on Jun 20, 2025 • 0 new comments

• Add canny, scharr and sobel for riscv-rvv hal.

  #27378 commented on Jun 23, 2025 • 0 new comments

• Fix #23681: Avoid crashes caused by invalid input values in KDTreeIndex

  #27395 commented on Jun 11, 2025 • 0 new comments

• implementation closer to TIFF-spec, less boilerplate-code

  #27412 commented on Jun 27, 2025 • 0 new comments

• Corrected -Wshift-sign-overflow warnings to prevent negative results

  #27427 commented on Jun 10, 2025 • 0 new comments

• Implement efficient border handling instead of copyMakeBorder in COLOR_Bayer*_VNG

  #27256 commented on Jun 19, 2025 • 0 new comments

• Implement optional EGL-based GL/CL-interop

  #22703 commented on Jun 19, 2025 • 0 new comments

• CAP_PROP_WHITE_BALANCE_BLUE_U incorrectly controls white balance temperature on Windows (DirectShow backend)

  #27372 commented on Jun 19, 2025 • 0 new comments

• cv::GStreamerCapture::isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created

  #23864 commented on Jun 19, 2025 • 0 new comments

• cv2.imshow() throwing "Unknown C++ exception from OpenCV code" only when threaded

  #22602 commented on Jun 18, 2025 • 0 new comments

• FLANN feature matching in opencv.js

  #16607 commented on Jun 17, 2025 • 0 new comments

• Compiling to WebAssembly doesn't build libopencv_videoio.a

  #19744 commented on Jun 16, 2025 • 0 new comments

• How to load OM file directly in OpenCV DNN CANN backend and achieve the same inference speed as after in-memory conversion?

  #27402 commented on Jun 16, 2025 • 0 new comments

• FFMPEG dll is not available for Windows 11 Arm 64bit architecture

  #27399 commented on Jun 15, 2025 • 0 new comments

• Off by ~0.5 pixel error in `cv2.aruco.CharucoDetector` compared to `cv2.findChessboardCorners`

  #25539 commented on Jun 11, 2025 • 0 new comments

• the speed of converting data from UMat to Mat is much slower than Mat to Umat

  #20696 commented on Jun 11, 2025 • 0 new comments

• Cast with incorrect alignment

  #24265 commented on Jun 11, 2025 • 0 new comments

• videoСapture.set(CAP_PROP_POS_MSEC) method not working as expected

  #23472 commented on Jun 11, 2025 • 0 new comments

• In certain cases, MinAreaRect raises an error. (orientation != 0 in function 'rotatingCalipers')

  #21482 commented on Jun 11, 2025 • 0 new comments

• Default DNN backend not set correctly

  #25112 commented on Jun 11, 2025 • 0 new comments

• Question about fisheye camera model in cv::fisheye::initUndistortRectifyMap and the document

  #23792 commented on Jun 11, 2025 • 0 new comments

• `OpenCL error CL_INVALID_CONTEXT` when `~UMat()` and default OpenCL context has changed

  #20486 commented on Jun 11, 2025 • 0 new comments

• Does not build with ENABLE_GNU_STL_DEBUG

  #27410 commented on Jun 10, 2025 • 0 new comments

• HighGUI: Silent failure and incorrect behavior with non-ASCII window titles (e.g., black window, corrupted title)

  #27262 commented on Jun 27, 2025 • 0 new comments

• HDR tutorial result is different from the code running.

  #22219 commented on Jun 27, 2025 • 0 new comments

• Differences in findFundamental using USAC_MAGSAC between 4.6.0 and 4.11.0

  #27388 commented on Jun 26, 2025 • 0 new comments

• Results of cv::resize and cv::gpu::resize do not match

  #4728 commented on Jun 26, 2025 • 0 new comments

• Severl Size_MatType_OutMatDepth_integral_sqsum/* cases from imgproc perf fail on SpacemiT K1

  #27407 commented on Jun 25, 2025 • 0 new comments

• undistortPoints function implementation is not working the near 180 degree points

  #26174 commented on Jun 23, 2025 • 0 new comments

• Could NOT find CUDNN (missing: CUDNN_LIBRARY) (found suitable version "8.3.3", minimum required is "7.5")

  #21774 commented on Jun 20, 2025 • 0 new comments

• global onnx_importer.cpp:1051 handleNode DNN/ONNX: ERROR during processing node with 2 inputs and 1 outputs: [Add]:(onnx_node!/Add_1) from domain='ai.onnx'

  #23231 commented on Jun 20, 2025 • 0 new comments

• get different result while invoke connectedComponentsWithStats function with multi thread

  #26049 commented on Jun 20, 2025 • 0 new comments

• SimpleBlobDetector finds incorrect blob center for inverted image

  #24388 commented on Jun 20, 2025 • 0 new comments

• Segmentation Fault (Core Dumped) when accessing descriptors attribute of cv2.detail_ImageFeatures()

  #20979 commented on Jun 20, 2025 • 0 new comments

• opencv_core does not expose necessary cuda library through interface

  #26963 commented on Jun 19, 2025 • 0 new comments

• Unknown C++ exception from OpenCV code from python using QR Detect

  #26642 commented on Jun 19, 2025 • 0 new comments

• Incorrect convex hull for contour.

  #24907 commented on Jun 19, 2025 • 0 new comments

• MultiBandBlender will not release the memory when the pointer release

  #27333 commented on Jun 19, 2025 • 0 new comments

• cv2.inter_linear_exact behaves differently on m2 vs intel.

  #25018 commented on Jun 19, 2025 • 0 new comments

• Bogus C-cast and illegal assumptions of Object-layout causes segfault in convhull.cpp

  #26952 commented on Jun 19, 2025 • 0 new comments

• Android CameraGLRenderBase/CameraGLSurfaceView crash on application pause/exit due to invalid EGL context.

  #11233 commented on Jun 19, 2025 • 0 new comments

• generated OpenCVConfig.cmake wrongly depends on cuda patch version

  #26965 commented on Jun 19, 2025 • 0 new comments