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A pretty small png library. Currently all documentation resides in pnglite.h.
Simple encoder and decoder for blurhashes. Contains a command line program as well as a shared library.
FreeImage is a library for developers who would like to support popular graphics image formats like PNG, BMP, JPEG, TIFF and others.
Nifti_clib is a set of I/O libraries for reading and writing files in the nifti-1, nifti-2, and (to some degree) cifti file formats. These are binary file formats for storing medical image data, e.g. MRI and fMRI brain images.
IQA is a C library for objectively measuring image/video quality. It implements many popular algorithms, such as MS-SSIM, MS-SSIM*, SIMM, MSE, and PSNR. It is designed to be fast, accurate, and reliable. All code is Valgrind-clean and unit tested.
VIGRA stands for Vision with Generic Algorithms. It is an image processing and analysis library that puts its main emphasis on customizable algorithms and data structures. It is particularly strong for multi-dimensional image processing.
APNG (Animated Portable Network Graphics) is an unofficial extension of the APNG (Portable Network Graphics) format. APNG patch provides APNG support to libpng.
GIFLIB is a library for reading and writing GIF images. It is API and ABI compatible with libungif which was in wide use while the LZW compression algorithm was patented. Tools are also included to convert, manipulate, compose, and analyze GIF images.
libyuv is an open source project that includes YUV scaling and conversion functionality. It can:
Scale YUV to prepare content for compression, with point, bilinear or box filter.
Convert to YUV from webcam formats for compression.
Convert to RGB formats for rendering/effects.
Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
This is a tiny, header-only C++ library for manipulating INI files.
Slurp can select a region in a Wayland compositor and print it to the standard output. It works well together with grim.
This package contains a reference implementation of JPEG XL (encoder and decoder).
MyPaint is a simple drawing and painting program that works well with Wacom-style graphics tablets.
WebP is a new image format that provides lossless and lossy compression for images. WebP lossless images are 26% smaller in size compared to PNGs. WebP lossy images are 25-34% smaller in size compared to JPEG images at equivalent SSIM index. WebP supports lossless transparency (also known as alpha channel) with just 22% additional bytes. Transparency is also supported with lossy compression and typically provides 3x smaller file sizes compared to PNG when lossy compression is acceptable for the red/green/blue color channels.
Imlib2 is a library that does image file loading and saving as well as rendering, manipulation, arbitrary polygon support, etc.
It does ALL of these operations FAST. Imlib2 also tries to be highly intelligent about doing them, so writing naive programs can be done easily, without sacrificing speed.
This is a complete rewrite over the Imlib 1.x series. The architecture is more modular, simple, and flexible.
Libpng is the official PNG (Portable Network Graphics) reference library. It supports almost all PNG features and is extensible.
Tgif (pronounced t-g-i-f) is an Xlib based interactive 2-D drawing tool (using vector graphics) under X11.
Imlib2 is a library that does image file loading and saving as well as rendering, manipulation, arbitrary polygon support, etc.
It does ALL of these operations FAST. Imlib2 also tries to be highly intelligent about doing them, so writing naive programs can be done easily, without sacrificing speed.
This is a complete rewrite over the Imlib 1.x series. The architecture is more modular, simple, and flexible.
Nifti_clib is a set of I/O libraries for reading and writing files in the nifti-1, nifti-2, and (to some degree) cifti file formats. These are binary file formats for storing medical image data, e.g. MRI and fMRI brain images.
The libUEMF library is a portable C99 implementation for reading and writing WFM, EMF, and EMF+ files.
JBIG2 is designed for lossy or lossless encoding of bilevel (1-bit monochrome) images at moderately high resolution, and in particular scanned paper documents. In this domain it is very efficient, offering compression ratios on the order of 100:1.
This is a decoder only implementation, and currently is in the alpha stage, meaning it doesn't completely work yet. However, it is maintaining parity with available encoders, so it is useful for real work.
APNG (Animated Portable Network Graphics) is an unofficial extension of the APNG (Portable Network Graphics) format. APNG patch provides APNG support to libpng.
Jp2a is a small utility that converts JPEG images to ASCII.
Collection of graphics images created to test PNG applications like viewers, converters and editors. As far as that is possible, all formats supported by the PNG standard are represented.