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This is the Eye of Gnome, a GNOME 2 image viewer and cataloging application. It provides inline image viewing support for nautilus.

MetaCam is a utility to read and decode meta-information from digital camera images with EXIF information. In addition to the standard EXIF fields, MetaCam also supports vendor-specific extensions from Nikon, Olympus, Canon and Casio.

Metapixel is a photomosaic generator. It can generate classical photomosaics, in which the source image is viewed as a matrix of equally sized rectangles for each of which a matching image is substituted, as well as collage-style photomosaics, where the images are placed at arbitrary positions in the source image, not aligned to a matrix.

Libpng 是一个 PNG 规范的伴侣，为需要支持 PNG 文件格式的应用程序节省大量的时间。 大多数用户不需要大量修改程序库；高级用户可能需要做稍多的修改。这个程序库也是为 用户而编写的。在使代码易于理解的同时也在尽可能地使代码完善。目前，这个程序库支 持 C。其他语言的支持也在考虑当中。 http://libpng.sourceforge.net/

GNU Ocrad is an OCR (Optical Character Recognition) program implemented as a filter and based on a feature extraction method. It reads a bitmap image in pbm format and outputs text in ISO-8859-1 (Latin-1) charset. Also includes a layout analyser able to separate the columns or blocks of text normally found on printed pages. It can be used as a stand-alone console application, or as a backend to other programs.

ExifTool is a highly customizable Perl script and module for reading and writing meta information in images. ExifTool reads EXIF, GPS, IPTC, XMP, GeoTIFF, ICC Profile and Photoshop IRB and ID3 meta information from JPG, JP2, TIFF, GIF, BMP, PICT, QTIF, PNG, MNG, JNG, MIFF, PPM, PGM, PBM, XMP, EPS, PS, AI, PDF, PSD, DCM, ACR, THM, CRW, CR2, MRW, NEF, PEF, ORF, RAF, RAW, SRF, MOS, X3F and DNG images, MP3 and WAV audio files, and AVI, MOV and MP4 videos. ExifTool also extracts information from the maker notes of many digital cameras by various manufacturers including Canon, Casio, FujiFilm, JVC/Victor, Kodak, Leaf, Minolta/Konica-Minolta, Nikon, Olympus/Epson, Panasonic/Leica, Pentax/Asahi, Ricoh, Sanyo and Sigma/Foveon. ExifTool writes EXIF, GPS, IPTC, XMP and MakerNotes meta information to JPEG, TIFF, GIF, CRW, THM, CR2, NEF, PEF and DNG images.

ExifTool is a highly customizable Perl script and module for reading and writing meta information in images. ExifTool reads EXIF, GPS, IPTC, XMP, GeoTIFF, ICC Profile and Photoshop IRB and ID3 meta information from JPG, JP2, TIFF, GIF, BMP, PICT, QTIF, PNG, MNG, JNG, MIFF, PPM, PGM, PBM, XMP, EPS, PS, AI, PDF, PSD, DCM, ACR, THM, CRW, CR2, MRW, NEF, PEF, ORF, RAF, RAW, SRF, MOS, X3F and DNG images, MP3 and WAV audio files, and AVI, MOV and MP4 videos. ExifTool also extracts information from the maker notes of many digital cameras by various manufacturers including Canon, Casio, FujiFilm, JVC/Victor, Kodak, Leaf, Minolta/Konica-Minolta, Nikon, Olympus/Epson, Panasonic/Leica, Pentax/Asahi, Ricoh, Sanyo and Sigma/Foveon. ExifTool writes EXIF, GPS, IPTC, XMP and MakerNotes meta information to JPEG, TIFF, GIF, CRW, THM, CR2, NEF, PEF and DNG images.

The Utah Raster toolkit is a collection of programs and C routines for dealing with raster images commonly encountered in computer graphics. It provides the following major functions: * A device and system independent image format for storing images and information about them. Called the RLE format, it uses run length encoding to reduce storage space for most images. * A library of C routines for reading, writing and manipulating images stored in the RLE format. * A collections of programs for manipulating and displaying RLE images.

yEd is a very powerful graph editor that can be used to quickly and effectively generate drawings and to apply automatic layouts to a range of different diagrams and networks. yEd makes full use of the yFiles library. This is a Java class library enabling the viewing, editing, optimizing, drawing, and animating of a wide range of diagrams, networks, and other graph-like structures.

PFScalibration package provides an implementation of the Robertson et al. 2003 method for the photometric calibration of cameras and for the recovery of high dynamic range (HDR) images from the set of low dynamic range (LDR) exposures.