1 This folder contains libraries and headers of a few very popular still image codecs
2 used by imgcodecs module.
3 The libraries and headers are preferably to build Win32 and Win64 versions of OpenCV.
4 On UNIX systems all the libraries are automatically detected by configure script.
5 In order to use these versions of libraries instead of system ones on UNIX systems you
6 should use BUILD_<library_name> CMake flags (for example, BUILD_PNG for the libpng library).
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9 libjpeg (deprecated) The Independent JPEG Group's JPEG software.
10 Copyright (C) 1991-2012, Thomas G. Lane, Guido Vollbeding.
11 See IGJ home page http://www.ijg.org
12 for details and links to the source code
14 libjpeg-turbo libjpeg-turbo is covered by three compatible BSD-style open source licenses.
15 Refer to [LICENSE.md](libjpeg-turbo/LICENSE.md) for a roll-up of license terms.
17 Site: https://github.com/libjpeg-turbo/libjpeg-turbo
18 API is compatible with original libjpeg.
20 WITH_JPEG CMake option must be ON to add libjpeg or libjpeg-turbo support to imgcodecs.
21 BUILD_JPEG=ON selects libjpeg-turbo by default (since OpenCV 3.4.2).
22 Enable BUILD_JPEG_TURBO_DISABLE=ON to force using of libjpeg (this option is removed in OpenCV 4.0).
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24 libpng Portable Network Graphics library.
25 The license and copyright notes can be found in libpng/LICENSE.
26 See libpng home page http://www.libpng.org
27 for details and links to the source code
29 WITH_PNG CMake option must be ON to add libpng support to imgcodecs.
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31 libtiff Tag Image File Format (TIFF) Software
32 Copyright (c) 1988-1997 Sam Leffler
33 Copyright (c) 1991-1997 Silicon Graphics, Inc.
34 See libtiff home page http://www.remotesensing.org/libtiff/
35 for details and links to the source code
37 WITH_TIFF CMake option must be ON to add libtiff & zlib support to imgcodecs.
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39 zlib General purpose LZ77 compression library
40 Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler.
41 See zlib home page http://www.zlib.net
42 for details and links to the source code
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44 jasper JasPer is a collection of software
45 (i.e., a library and application programs) for the coding
46 and manipulation of images. This software can handle image data in a
47 variety of formats. One such format supported by JasPer is the JPEG-2000
48 format defined in ISO/IEC 15444-1.
50 Copyright (c) 1999-2000 Image Power, Inc.
51 Copyright (c) 1999-2000 The University of British Columbia
52 Copyright (c) 2001-2003 Michael David Adams
54 The JasPer license can be found in libjasper.
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56 openexr OpenEXR is a high dynamic-range (HDR) image file format developed
57 by Industrial Light & Magic for use in computer imaging applications.
59 Copyright (c) 2006, Industrial Light & Magic, a division of Lucasfilm
60 Entertainment Company Ltd. Portions contributed and copyright held by
61 others as indicated. All rights reserved.
63 The project homepage: http://www.openexr.com
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65 ffmpeg FFmpeg is a complete, cross-platform solution to record,
66 convert and stream audio and video. It includes libavcodec -
67 the leading audio/video codec library, and also libavformat, libavutils and
68 other helper libraries that are used by OpenCV (in videoio module) to
69 read and write video files.
71 Copyright (c) 2001 Fabrice Bellard
73 The project homepage: http://ffmpeg.org/.
75 * On Linux/OSX we link user-installed ffmpeg (or ffmpeg fork libav).
76 * On Windows we use pre-built ffmpeg binaries,
77 see opencv/3rdparty/ffmpeg/readme.txt for details and licensing information
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