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Release highlights:

  • Enabled runtime dispatched optimizations for larger set of functions in core and imgproc modules.
  • dnn module has got several improvements:
    • Inference Engine backend has been switched to NN Builder API, supported Intel® Neural Compute Stick 2
    • Reduced peak memory consumption and supported multiple new networks from TensorFlow
  • Android Media NDK API support has been added to videoio module
  • Added several Perceptually Uniform Sequental colormaps
  • New Image Quality Analysis module (quality) has been added to the opencv_contrib, referenceless BRISQUE algorithm has been implemented as well as PSNR, SSIM and others
  • Robust Local Optical Flow algorithm has been added to opencv_contrib/optflow module
  • Quasi Dense Stereo matching algorithm has been implemented in opencv_contrib/stereo module
  • Added Hand-Eye Calibration methods
More details can be found in the Changelog

Most of bugfixes and improvements have made their way to both 3.4 and master branches.

Contributors

Big thanks to everybody who contributed (here is the incomplete list of patch authors; please, report if you contributed but do not see your name here):

opencv Alexander Alekhin, Dmitry Kurtaev, Vitaly Tuzov, Maksim Shabunin, Namgoo Lee, Rostislav Vasilikhin, Quentin Chateau, Sayed Adel, smirnov-alexey, Alexander Nesterov, Alexey Smirnov, LaurentBerger, Giles Payne, Pavel Rojtberg, Andrey Golubev, Brad Kelly, Liubov Batanina, Ruslan Garnov, berak, catree, Christoph Rackwitz, Kohei Yoshida, Lee Jaehwan, Pedro Ferreira da Costa, Stefan Dragnev, Suleyman TURKMEN, Wu Zhiwen, klemens, npochhi, zuoshaobo, 103yiran, AKAMath, Adrian Renner, AnastasiaaSenina, Arnaud Brejeon, Augusto Fraga Giachero, Ayush Pandey, BALACHANDAR S, Bharat123Rox, CUI Hao (Lab), Christopher N. Hesse, David Carlier, Easton Liu, ExpandingDev, George Wilson, Gregor Mittag, Hannah McLaughlin, Jaewoo Song, Jim Zhou, JoeHowse, Josh Veitch-Michaelis, Juha Reunanen, Kangning Song, Lindsay Roberts, Lubov Batanina, Lucas Towers, Matthew K. Gumbel, Nicolae Rosia, Oleh, Otto Seiskari, Pierre Chatelier, RAJKIRAN NATARAJAN, Rajkiran Natarajan, Ramez Rafla, Raphael Graf, Richard Veale, Scott Ramsby, Thang Tran, Thomas Peters, WuZhiwen, atinfinity, cftang, iPanda, mehlukas, rpici, winice, x3lif opencv_contrib Namgoo Lee, Pavel Rojtberg, Alexander Alekhin, clunietp, Hamdi Sahloul, Maksim Shabunin, Raphael Graf, Charles Taylor, Dimitrios Psychogyios, Dmitry Kurtaev, JoeHowse, Julian Seuffert, Richard Veale, Sreejith S, Ted Steiner, Tomoaki Teshima, berak, iindovina, kushashwa ravi shrimali, shimat, tsenst, utkarshg6 Download 4.1

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Unfortunately one of our admin accounts on SourceForge has been taken over for a small period of time. Some files has been replaced with possibly malicious program.

Affected files:

  • 4.0.1/opencv-4.0.1-vc14_vc15.exe - file reuploaded, correct SHA1 sum is d9b208c250e3cc136ddfc5d17fa9c82e52c5ce3a.
  • 4.0.0-alpha/* - directory removed

Related issue on GitHub: #14127

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The Decoded Show came by to make a film about OpenCV and its use in film production at Arraiy.com along with mention of its use in Silicon Valley in general and in healthcare apps in particular at Nestle in New York City.

The New Face of Computer Vision - DECODED S3E2 - YouTube
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After almost 3.5 years since groundbreaking 3.0 release, we are glad to present the first stable release in the 4.x line.

Release highlights:

  • OpenCV is now C++11 library and requires C++11-compliant compiler. Minimum required CMake version has been raised to 3.5.1.
  • A lot of C API from OpenCV 1.x has been removed.
  • Persistence (storing and loading structured data to/from XML, YAML or JSON) in the core module has been completely reimplemented in C++ and lost the C API as well.
  • New module G-API has been added, it acts as an engine for very efficient graph-based image procesing pipelines.
  • dnn module now includes experimental Vulkan backend and supports networks in ONNX format.
  • The popular Kinect Fusion algorithm has been implemented and optimized for CPU and GPU (OpenCL)
  • QR code detector and decoder have been added to the objdetect module
  • Very efficient and yet high-quality DIS dense optical flow algorithm has been moved from opencv_contrib to the video module.
  • More details can be found in previous announces: 4.0-alpha, 4.0-beta, 4.0-rc and in the changelog

Branch 3.4 will be switched to maintanence mode: only bugfixes and light features will be accepted. BTW, release 3.4.4 is ready too!

For those who have not took part in the OpenCV 2018 survey yet, feel free to share your thoughts.

Contributors

Big thanks to everybody who contributed (here is the incomplete list of patch authors; please, report if you contributed but do not see your name here):

opencv Alexander Alekhin, Dmitry Kurtaev, Hamdi Sahloul, Maksim Shabunin, Vitaly Tuzov, berak, Tomoaki Teshima, Vadim Pisarevsky, catree, Suleyman TURKMEN, Sayed Adel, Alexander Nesterov, Pavel Rojtberg, Rostislav Vasilikhin, Dmitry Matveev, Kuang Fangjun, Li Peng, Wu Zhiwen, take1014, cyy, yuki takehara, Evgeny Latkin, LaurentBerger, cclauss, Apoorv Goel, Karpushin Vladislav, Lubov Batanina, Michał Janiszewski, Namgoo Lee, Ruslan Garnov, Wenfeng CAI, k-shinotsuka, shengyu, tompollok, Adam Radomski, Alexander Duda, Alexander Enaldiev, Andrew Mroczkowski, Antonio Borondo, AsyaPronina, Dmitry Budnikov, George Mironov, Jiri Horner, Mansoo Kim, Mark Harfouche, Pavel Vlasov, Peter Rekdal Sunde, Sean McBride, Vlad Karpushin, Vladislav Sovrasov, fegorsch, gkaneto, luz.paz, pasbi, Adam Rankin, Alessandro de Oliveira Faria (A.K.A.CABELO), Alexey Nikolaev, Ali Yasin Eser, Anush Elangovan, Apoorv, Arnaud Brejeon, Bahram Dahi, CJ Smith, CYTing1998, Christopher Gundler, Colin Smith, Damien Picard, David, Diego Barrios Romero, Emanuele Ruffaldi, Fangjun Kuang, Florian Echtler, Forrest Reiling, Gaetano Checinski, Georgy Mironov, HarshDolhare, Henry, Hiro Kobayashi, Ilari Venäläinen, Ivan Pozdeev, Jakub Golinowski, Jean Carass, Kaartic Sivaraam, Khem Raj, Kyle D. Patterson, Latkin, Yevgeny I, Li, Peng, Loic Devulder, Loic Petit, Lucas Teixeira, Marat K, Marco A. Gutierrez, Matt Bennett, Maxim Smirnov, Menghui Xie, Michael Firman, Nesterov Alexander, Nobuo Tsukamoto, Patrick Cox, Paul Jurczak, Paul Shin, Paul92, Peter Jozsa, Peter Leitzen, Peter Whidden, Philipp Hasper, Pierre Jeambrun, Reid Kleckner, Ryan Wong, Sacha, Sam Radhakrishnan, Sancho McCann, Sergey Nuzhny, Simon Que, Spark Echo, Takuho NAKANO, Teng Yiliang, Todor Tomov, Triplesalt, Vlad Kraevskiy, WuZhiwen, Zhenqing Hu, abhi-jha, amatyuko, asciian, branka-plateiq, cDc, cabelo, chacha21, drkoller, exoson, gineshidalgo99, gnthibault, huangqinjin, ilovezfs, jasjuang, jsxyhelu, kamino410, logic1988, lqy123000, matech96, maver1, miaow1988, rockzhan, root, soonbro, ssnover95, tellowkrinkle, unknown, vishwesh5, wanghanmin, woody.chow, yom, zarelaky, zuoshaobo opencv_contrib Alexander Alekhin, Hamdi Sahloul, Pavel Rojtberg, LaurentBerger, Tomoaki Teshima, berak, Maksim Shabunin, Vadim Pisarevsky, Rostislav Vasilikhin, Suleyman TURKMEN, Jukka Komulainen, soyer, tompollok, Lubos, Vitaly Tuzov, catree, Anton Shutikhin, Antonio Borondo, Colin, Dietrich Büsching, Jan Beich, Jeff Bail, Jiri Horner, Khem Raj, Kushashwa Ravi Shrimali, Li-Chi Huang, Mohammad Haghighat, Sayed Adel, SongChiYoung, Unknown, Varvrar, Vladislav Sovrasov, YTY, bini, d.bouron, dianlujitao fegorsch, gdemarcq, gmedan, kartoffelsalat, simonreich, trobro, yarglawaldeg, Download 4.0

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Note: If the form below does not work, please use this link: https://goo.gl/forms/NvgMtNSfedZf5mpg1

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We've just released a very close approximation of OpenCV 4.0, the release candidate.

OpenCV 4.0 RC includes ~60 new patches since OpenCV 4.0 beta:

  • Experimental Vulkan backend have been added to the dnn module, thanks to Zhiwen Wu and Juan J. Zhao.
  • opencv_stitching module interface has been refactored, thanks to Jiri Horner.
  • More accurate camera calibraion method have been implemented, thanks to Wenfeng CAI.
  • Persistence part of the core module (storing data in XML/YML/JSON formats) has been rewritten in C++ and consumes less memory when reading FileStorage. The C API (CvFileStorage) has been removed.
  • Graph API module has been extended: it recieved initial heterogenity support, OpenCL support, better documentation, ability to build it standalone. Thanks to Dmitry Matveev, Dmitry Budnikov and other G-API folks!
  • Some more of obsolete C-API has been removed in the following modules: photo, video, imgcodecs, videoio
  • Dropped obsolete videoio and highgui backends: QuickTime, QTKit, Unicap, Video for Windows, libv4l, DC1394_V1, Carbon
  • shape, superres, videostab, viz modules and TVL1 optical flow algorithm were moved to opencv_contrib
  • DIS optical flow algorithm, implemented by Alexander Bokov, has been moved to the main repository from opencv_contrib.
  • Some latest changes in 3.4 branch have been merged to the master, including updated libpng (security fixes), XCode 10 support, Turing GPU support, many optimizations and bug fixes
Contributors

Big thanks to everybody who contributed (here is the incomplete list of patch authors; please, report if you contributed but do not see your name here):

opencv

Alexander Alekhin, Vadim Pisarevsky, Dmitry Kurtaev, berak, catree, Wu Zhiwen, Alexander Nesterov, Dmitry Matveev, LaurentBerger, Michał Janiszewski, Ruslan Garnov, Vitaly Tuzov, AsyaPronina, Dmitry Budnikov, Maksim Shabunin, Mansoo Kim, Pavel Rojtberg, Rostislav Vasilikhin, Sayed Adel, Sean McBride, Suleyman TURKMEN, Wenfeng CAI, fegorsch, Alexey Nikolaev, Ali Yasin Eser, Antonio Borondo, Apoorv, Apoorv Goel, Diego Barrios Romero, Emanuele Ruffaldi, Evgeny Latkin, Henry, Ilari Venäläinen, Ivan Pozdeev, Jean Carass, Jiri Horner, Karpushin Vladislav, Marco A. Gutierrez, Matt Bennett, Paul Shin, Tomoaki Teshima, WuZhiwen, gineshidalgo99, huangqinjin, jasjuang, kamino410, lqy123000, maver1, tompollok, unknown, wanghanmin

opencv_contrib

Alexander Alekhin, Vadim Pisarevsky, Pavel Rojtberg, Jukka Komulainen, LaurentBerger, tompollok, Mohammad Haghighat, Suleyman TURKMEN, Tomoaki Teshima, Varvrar, YTY, berak, kartoffelsalat

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Dear OpenCV Community,

We are glad to announce that OpenCV 4.0 Beta is now available, which includes many new features and enhancements. Along with this new library, are new open source tools to help fast-track high performance computer vision development and deep learning inference in OpenVINO™ toolkit (Open Visual Inference and Neural Network Optimization). More details about these releases and where to download follow.

OpenCV 4.0 Beta—What’s New

OpenCV 4.0 Beta includes 29 new patches, including massive merges from 3.4 branch, since OpenCV 4.0 alpha (https://opencv.org/opencv-4-0-0-alpha.html):

  • ONNX* (Open Neural Network Exchange) importer has been further improved to support more topologies.
  • OpenCV DNN sample object_detection.py has been improved to fill in the right model parameters, so it’s much easier to use now.
  • G-API (Graph API) - super-efficient image processing pipeline engine has been integrated as opencv_gapi module
  • Fast QR code decoder, based on free QUirc (https://github.com/dlbeer/quirc) library has been integrated, so now we have a complete QR-code detection and decoding pipeline (that runs ~20-80FPS @ 640x480 resolution).
  • 18 functions, over 60 kernels have been accelerated for AVX2 using “wide universal intrinsics.”
  • Kinect Fusion algorithm has been accelerated for iGPU, which resulted in ~3x speedup over parallel CPU version on high-resolution volume (512x512x512).
The release should be quite stable, but more changes are expected by OpenCV 4.0 gold. Contributors

Big thanks to everybody who contributed (here is the incomplete list of patch authors; please, report if you contributed but do not see your name here):

opencv

Alexander Alekhin, Hamdi Sahloul, Dmitry Kurtaev, Suleyman TURKMEN, Tomoaki Teshima, Vitaly Tuzov, Maksim Shabunin, Dmitry Matveev, Sayed Adel, Adam Radomski, Apoorv Goel, Pavel Rojtberg, Rostislav Vasilikhin, Alexander Duda, Alexander Nesterov, Andrew Mroczkowski, Antonio Borondo, Anush Elangovan, Georgy Mironov, Loic Devulder, Loic Petit, Lubov Batanina, Menghui Xie, Peter Rekdal Sunde, Peter Whidden, Reid Kleckner, Sam Radhakrishnan, berak, chacha21, drkoller, soonbro, take1014, tellowkrinkle, tompollok

opencv_contrib

Hamdi Sahloul, Tomoaki Teshima, Alexander Alekhin, Pavel Rojtberg, Maksim Shabunin, berak, soyer, Lubos, Rostislav Vasilikhin, Antonio Borondo, Jeff Bail, LaurentBerger, Sayed Adel, Suleyman TURKMEN, tompollok

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Intel Releases Open Source Tools to Accelerate Computer Vision & Deep Learning

Intel announces that OpenVINO™ toolkit is now open sourced. This developer toolkit provides flexibility and availability to the developer community to accelerate development of vision capabilities and AI end-to-end across device to network and cloud. The toolkit enables high performance computer vision and deep learning inference with easy heterogeneous execution across multiple types of Intel® platforms. It includes:

  • The Deep Learning Deployment Toolkit helps enable fast, heterogeneous deep learning inferencing for Intel® processors (CPU and GPU/ Intel® Processor Graphics), and supports more than 100 public and custom models.
  • Open Model Zoo includes 20+ pre-trained deep learning models to expedite development and improve deep learning inference on Intel® processors, along with many samples to easily get started.

Learn more at https://01.org/openvinotoolkit

Note: The Intel® Distribution of OpenVINO™ toolkit will still be available as free commercial product and includes additional, proprietary support for Intel® FPGAs, Intel® Movidius™ Neural Compute Stick, and traditional computer vision functions and libraries

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Dear OpenCV community,

We are glad to announce OpenCV 4.0 alpha release, the first intermediate release before 4.0. OpenCV 4.0 gold is expected in the end of October.

What’s new:

First of all, 4.0 alpha includes all the latest improvements, optimizations and bug fixes from 3.4 branch. In particular:

  • ONNX parser has been added to OpenCV DNN module. It supports various classification networks, such as AlexNet, Inception v2, Resnet, VGG etc. The tiny YOLO v2 object detection network is also partially supported.
  • A few other notable DNN improvements:
    • Mask RCNN support and the example
    • Faster object detection when using Intel Inference Engine (a part of Intel OpenVINO)
    • Several stability improvements in the OpenCL backend.
  • Fast QR code detector (~80FPS @ 640x480 resolution on Core i5 desktop). By 4.0 gold we plan to add the QR code decoder as well, so that we have a complete solution.
  • Constantly expanding set of SSE4-, AVX2- and NEON-optimized kernels via so called “wide universal intrinsics”.

Besides, OpenCV 4.0 alpha includes some exclusive features, such as:

  • OpenCV is C++11 library now and it requires C++11 compliant compiler. Therefore, some nice features like parallel_for with lambda functions, convenient iteration over cv::Mat, initialization of cv::Mat by listing its elements etc. are available by default.
  • The standard std::string and std::shared_ptr replaced hand-crafted cv::String and cv::Ptr. Our parallel_for can now use the pool of std::threads as the backend.
  • The legacy C API from OpenCV 1.x (using CvMat, IplImage, etc.) is partially excluded; the cleanup should mostly be finished by OpenCV 4.0 gold.
  • Added basic FP16 support (the new CV_16F type has been added).
  • CPU- and GPU-accelerated KinFu live 3d dense reconstruction algorithm has been included into opencv_contrib.
  • HPX parallel backend (thanks to Jakub Golinowski)
  • The new chessboard detector (thanks to Alexander Duda)

Overall, OpenCV 4.0 alpha release includes 85 patches, including 28 massive merge requests from 3.4 branch.

Please note that even though the release should be quite stable, quite a few changes in OpenCV API and implementation are yet to be done before 4.0 final.

Contributors

Big thanks to everybody who helped us to make this release and to all the people who supports OpenCV in one or another way!

Here is the incomplete list of contributors to OpenCV 4.0 alpha (if you contributed but do not see your name here, please let us know):

opencv

Alexander Alekhin, Dmitry Kurtaev, Maksim Shabunin, Hamdi Sahloul, Vitaly Tuzov, berak, Tomoaki Teshima, catree, Vadim Pisarevsky, Suleyman TURKMEN, Sayed Adel, Kuang Fangjun, Alexander Nesterov, Li Peng, Pavel Rojtberg, Rostislav Vasilikhin, cyy, take1014, yuki takehara, cclauss, Namgoo Lee, k-shinotsuka, shengyu, Alexander Enaldiev, George Mironov, Karpushin Vladislav, Lubov Batanina, Mark Harfouche, Pavel Vlasov, Vlad Karpushin, Wu Zhiwen, gkaneto, luz.paz, pasbi, Adam Rankin, Alessandro de Oliveira Faria (A.K.A.CABELO), Alexander Duda, Andrew Mroczkowski, Arnaud Brejeon, Bahram Dahi, CJ Smith, CYTing1998, Colin Smith, Damien Picard, David, Fangjun Kuang, Florian Echtler, Forrest Reiling, Gaetano Checinski, HarshDolhare, Hiro Kobayashi, Jakub Golinowski, Jiri Horner, Kaartic Sivaraam, Khem Raj, Kyle D. Patterson, LaurentBerger, Li, Peng, Lucas Teixeira, Marat K, Maxim Smirnov, Michael Firman, Nesterov Alexander, Nobuo Tsukamoto, Paul Jurczak, Paul92, Peter Jozsa, Peter Leitzen, Peter Rekdal Sunde, Philipp Hasper, Pierre Jeambrun, Ryan Wong, Sacha, Sancho McCann, Sergey Nuzhny, Simon Que, Spark Echo, Takuho NAKANO, Teng Yiliang, Todor Tomov, Triplesalt, Vlad Kraevskiy, Vladislav Sovrasov, Wenfeng CAI, Zhenqing Hu, abhi-jha, amatyuko, asciian, branka-plateiq, cDc, cabelo, exoson, gnthibault, ilovezfs, jsxyhelu, logic1988, matech96, miaow1988, rockzhan, tompollok, vishwesh5, woody.chow, yom, zarelaky, zuoshaobo

opencv_contrib

Alexander Alekhin, Pavel Rojtberg, LaurentBerger, Hamdi Sahloul, berak, Maksim Shabunin, Rostislav Vasilikhin, Suleyman TURKMEN, Vitaly Tuzov, catree, Anton Shutikhin, Colin, Dietrich Büsching, Jan Beich, Jiri Horner, Khem Raj, Kushashwa Ravi Shrimali, Li-Chi Huang, SongChiYoung, Unknown, Vadim Pisarevsky, Vladislav Sovrasov, bini, d.bouron, dianlujitao, fegorsch, gdemarcq, gmedan, simonreich, trobro, yarglawaldeg

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Yours truly,
OpenCV dev team

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As many of you know, Intel is now one of the biggest sponsors of OpenCV, and gets really serious about AI and CV. OpenCV community, i.e. you, are invited to attend Intel AI DevCon 2018 in San Francisco on May 23-24th:

“Connect with top minds in data science, machine and deep learning, application development, and research to hear the latest perspectives and see practical implementations that break barriers between theory and real-world function. Get two full days of hands-on training on TensorFlow, MXNet, AWS DeepLens and more, see real-world demos by GE, Lenovo, NASA FDL, Ferrari Challenge and others, and hear leading-edge research from experts including Professor Yisong Yue from Caltech and Matt Zeiler, Founder and CEO of Clarifai.”

OpenCV and Intel Computer Vision SDK (https://software.intel.com/en-us/computer-vision-sdk), which includes OpenCV, will be mentioned in the keynotes and during the demos.

More details and the registration information are available at https://www.intel.com/content/www/us/en/events/ai/devcon.html.

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We are glad to present the first 2018 release of OpenCV, v3.4.1, with further improved DNN module and many other improvements and bug fixes. Overall, about 250 patches have been integrated and over 200 issues have been closed since OpenCV 3.4.0. See the changelog for details.

Big thanks to everyone who contributed:

opencv

Alexander Alekhin, Dmitry Kurtaev, Li Peng, Maksim Shabunin, Fangjun Kuang, Vitaly Tuzov, luz.paz, Namgoo Lee, Tomoaki Teshima, Arjan van de Ven, Glue Crow, LaurentBerger, Sayed Adel, Suleyman TURKMEN, Alessandro de Oliveira Faria (A.K.A.CABELO), Arthur Williams, Gregory Morse, Hamdi Sahloul, Pavel Rojtberg, Rostislav Vasilikhin, Steven, Woody Chow, berak, csukuangfj, oqtvs, victor-ludorum, wxzs5, Aaron Bray, Aditya Rohan, Alexander Nesterov, Ali Sentas, Ce Zheng, Chris Hall, Coralie RACHEX, Csaba Keszegh, David Koller, Elena Gvozdeva, Eric Wang, Erik Man, Florian Echtler, GlueCrow, Harshal Nishar, Jozef Mlich, Jun Zhao, Li, Peng, Mark Harfouche, Moshe, PalkoNazar, Patrik Huber, Philipp Hasper, Ryo Suzuki, Rémi Ratajczak, SarenT, Stanislaw Halik, Sui Libin, Tom Becker, Travers, Vinay Sharma, Ya-Chiu Wu, catree, denmatfoton, elenagvo, jasjuang, mworchel, razerhell, sergeybe, take1014, tobycollins, woody.chow, yuki takehara

opencv_contrib

Pavel Rojtberg, Hamdi Sahloul, Alexander Alekhin, KUANG Fangjun, Maksim Shabunin, Vitaly Tuzov, berak, catree, Adam, Andrej Muhič, Fangjun Kuang, John Cant, Kv Manohar, Plamen Dimitrov, Suleyman TURKMEN, Yujun Shi, adrianheron, caseymcc, klchang

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OpenCV dev team

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