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| readme.txt | ||
This folder contains libraries and headers of a few very popular still image codecs
used by imgcodecs module.
The libraries and headers are preferably to build Win32 and Win64 versions of OpenCV.
On UNIX systems all the libraries are automatically detected by configure script.
In order to use these versions of libraries instead of system ones on UNIX systems you
should use BUILD_<library_name> CMake flags (for example, BUILD_PNG for the libpng library).
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libjpeg (deprecated) The Independent JPEG Group's JPEG software.
Copyright (C) 1991-2012, Thomas G. Lane, Guido Vollbeding.
See IGJ home page http://www.ijg.org
for details and links to the source code
libjpeg-turbo libjpeg-turbo is covered by three compatible BSD-style open source licenses.
Refer to [LICENSE.md](libjpeg-turbo/LICENSE.md) for a roll-up of license terms.
Site: https://github.com/libjpeg-turbo/libjpeg-turbo
API is compatible with original libjpeg.
WITH_JPEG CMake option must be ON to add libjpeg or libjpeg-turbo support to imgcodecs.
BUILD_JPEG=ON selects libjpeg-turbo by default (since OpenCV 3.4.2).
Enable BUILD_JPEG_TURBO_DISABLE=ON to force using of libjpeg (this option is removed in OpenCV 4.0).
SIMD instructions are enabled by default. Use ENABLE_LIBJPEG_TURBO_SIMD to control SIMD instructions.
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libpng Portable Network Graphics library.
The license and copyright notes can be found in libpng/LICENSE.
See libpng home page http://www.libpng.org
for details and links to the source code
WITH_PNG CMake option must be ON to add libpng support to imgcodecs.
libspng Portable Network Graphics library.
The license and copyright notes can be found in libspng/LICENSE.
See libspng home page https://libspng.org
for details and links to the source code
WITH_SPNG CMake option must be ON to add libspng support to imgcodecs
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libtiff Tag Image File Format (TIFF) Software
Copyright (c) 1988-1997 Sam Leffler
Copyright (c) 1991-1997 Silicon Graphics, Inc.
See libtiff home page #1 http://www.simplesystems.org/libtiff/
#2 https://libtiff.gitlab.io/libtiff/
for details and links to the source code
WITH_TIFF CMake option must be ON to add libtiff & zlib support to imgcodecs.
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zlib General purpose LZ77 compression library
Copyright (C) 1995-2022 Jean-loup Gailly and Mark Adler.
See zlib home page http://www.zlib.net
for details and links to the source code
zlib-ng zlib data compression library for the next generation systems
(C) 1995-2013 Jean-loup Gailly and Mark Adler
See zlib-ng official GitHub repository
https://github.com/zlib-ng/zlib-ng.git
for details and links to source code
WITH_ZLIB_NG CMake option must be ON to use zlib-ng as the zlib implementation.
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jasper JasPer is a collection of software
(i.e., a library and application programs) for the coding
and manipulation of images. This software can handle image data in a
variety of formats. One such format supported by JasPer is the JPEG-2000
format defined in ISO/IEC 15444-1.
Copyright (c) 1999-2000 Image Power, Inc.
Copyright (c) 1999-2000 The University of British Columbia
Copyright (c) 2001-2003 Michael David Adams
See JasPer official GitHub repository
https://github.com/jasper-software/jasper.git
for details and links to source code
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openexr OpenEXR is a high dynamic-range (HDR) image file format developed
by Industrial Light & Magic for use in computer imaging applications.
Copyright (c) 2006, Industrial Light & Magic, a division of Lucasfilm
Entertainment Company Ltd. Portions contributed and copyright held by
others as indicated. All rights reserved.
The project homepage: http://www.openexr.com
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ffmpeg FFmpeg is a complete, cross-platform solution to record,
convert and stream audio and video. It includes libavcodec -
the leading audio/video codec library, and also libavformat, libavutils and
other helper libraries that are used by OpenCV (in videoio module) to
read and write video files.
Copyright (c) 2001 Fabrice Bellard
The project homepage: http://ffmpeg.org/.
* On Linux/OSX we link user-installed ffmpeg (or ffmpeg fork libav).
* On Windows we use pre-built ffmpeg binaries,
see opencv/3rdparty/ffmpeg/readme.txt for details and licensing information
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