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The JPEG standard used for the compression coding in JFIF files does not define which color encoding is to be used for images. JFIF defines the color model to be used: either Y for greyscale, or YCbCr derived from RGB color primaries as defined in CCIR 601 (now known as Rec. ITU-R BT.601), except with a different "full range" scaling of the Y ...
The JPEG standard specifies the codec, which defines how an image is compressed into a stream of bytes and decompressed back into an image, but not the file format used to contain that stream. [19] The Exif and JFIF standards define the commonly used file formats for interchange of JPEG-compressed images.
The High Efficiency Image File Format (HEIF) is an image container format that was standardized by MPEG on the basis of the ISO base media file format. While HEIF can be used with any image compression format, the HEIF standard specifies the storage of HEVC intra-coded images and HEVC-coded image sequences taking advantage of inter-picture ...
For the JPEG standards that are published jointly with ITU-T, each ISO/IEC Part corresponds to a separate ITU-T Recommendation (i.e., a separate standard). Once published, JPEG standards have also often been revised by later amendments and/or new editions – e.g., to add optional extended capabilities or improve the editorial quality of the ...
JPEG 2000 (JP2) is an image compression standard and coding system. It was developed from 1997 to 2000 by a Joint Photographic Experts Group committee chaired by Touradj Ebrahimi (later the JPEG president), [1] with the intention of superseding their original JPEG standard (created in 1992), which is based on a discrete cosine transform (DCT), with a newly designed, wavelet-based method.
printing/publishing industry standard format PPM: Portable Pixmap File Format ASCII.ppm image/x-portable-pixmap Very easy to understand. Programs to analyze and write to this format are easily written. Yes PSD: Photoshop Document Adobe Systems.psd, .psb, .pdb,.pdd image/vnd.adobe.photoshop [6] Used mainly for storing image manipulation ...
C4 – JEDMICS image files, a DOD system; CALS – JEDMICS image files, a DOD system; XAML – Used in programs like Visual Studio to create exe files. CPT, SEA – Compact Pro ; CS – File extension for C-Sharp (C#) files; DAA – DAA: Closed-format, Windows-only compressed disk image; DEB – Debian install package
Online File Signature Database for Forensic Practitioners, a private compilation free to Law Enforcement; Man page for compress, uncompress, and zcat on SCO Open Server; Public Database of File Signatures [dead link ] Complete list of magic numbers with sample files; the original libmagic data files with thousands of entries as used by file ...