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).
23 SIMD instructions are enabled by default. Use ENABLE_LIBJPEG_TURBO_SIMD to control SIMD instructions.
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25 libpng Portable Network Graphics library.
26 The license and copyright notes can be found in libpng/LICENSE.
27 See libpng home page http://www.libpng.org
28 for details and links to the source code
30 WITH_PNG CMake option must be ON to add libpng support to imgcodecs.
32 libspng Portable Network Graphics library.
33 The license and copyright notes can be found in libspng/LICENSE.
34 See libspng home page https://www.libspng.org
35 for details and links to the source code
37 WITH_SPNG CMake option must be ON to add libspng support to imgcodecs
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39 libtiff Tag Image File Format (TIFF) Software
40 Copyright (c) 1988-1997 Sam Leffler
41 Copyright (c) 1991-1997 Silicon Graphics, Inc.
42 See libtiff home page http://www.libtiff.org/
43 for details and links to the source code
45 WITH_TIFF CMake option must be ON to add libtiff & zlib support to imgcodecs.
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47 zlib General purpose LZ77 compression library
48 Copyright (C) 1995-2022 Jean-loup Gailly and Mark Adler.
49 See zlib home page http://www.zlib.net
50 for details and links to the source code
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52 jasper JasPer is a collection of software
53 (i.e., a library and application programs) for the coding
54 and manipulation of images. This software can handle image data in a
55 variety of formats. One such format supported by JasPer is the JPEG-2000
56 format defined in ISO/IEC 15444-1.
58 Copyright (c) 1999-2000 Image Power, Inc.
59 Copyright (c) 1999-2000 The University of British Columbia
60 Copyright (c) 2001-2003 Michael David Adams
62 See JasPer official GitHub repository
63 https://github.com/jasper-software/jasper.git
64 for details and links to source code
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66 openexr OpenEXR is a high dynamic-range (HDR) image file format developed
67 by Industrial Light & Magic for use in computer imaging applications.
69 Copyright (c) 2006, Industrial Light & Magic, a division of Lucasfilm
70 Entertainment Company Ltd. Portions contributed and copyright held by
71 others as indicated. All rights reserved.
73 The project homepage: http://www.openexr.com
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75 ffmpeg FFmpeg is a complete, cross-platform solution to record,
76 convert and stream audio and video. It includes libavcodec -
77 the leading audio/video codec library, and also libavformat, libavutils and
78 other helper libraries that are used by OpenCV (in videoio module) to
79 read and write video files.
81 Copyright (c) 2001 Fabrice Bellard
83 The project homepage: http://ffmpeg.org/.
85 * On Linux/OSX we link user-installed ffmpeg (or ffmpeg fork libav).
86 * On Windows we use pre-built ffmpeg binaries,
87 see opencv/3rdparty/ffmpeg/readme.txt for details and licensing information
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