ISO/IEC 14495-2-ed.2.0

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Kódování grafických a fotografických informací

Anotácia textu normy ISO/IEC 14495-2-ed.2.0 :

ISO/IEC 14495-2:2003 defines a set of lossless (bit-preserving) and nearly lossless (where the error for each reconstructed sample is bounded by a predefined value) compression methods for coding continuous-tone (including bi-level), gray-scale, or colour digital still images. ISO/IEC 14495-2:2003:

• specifies extensions (including arithmetic coding, extension of near lossless coding, extension of prediction and extension of Golomb coding) to processes for converting source image data to compressed image data;
• specifies extensions to processes for converting compressed image data to reconstructed image data including an extension for sample tranformation for inverse colour transforms;
• specifies coded representations for compressed image data;
• provides guidance on how to implement these processes in practice.

• la specification des extensions (destinees notamment au codage arithmetique, au codage quasi sans perte, a la prediction et au codage de Golomb) des processus de conversion des donnees dimage source en donnees dimage comprimees;
• la specification des extensions des processus de conversion des donnees dimage comprimees en donnees dimage reconstituees, notamment une extension destinee a la transformation dun echantillon lors de la transformee inverse des couleurs;
• la specification des representations codees des donnees dimage comprimees;
• des conseils pratiques pour limplementation de ces processus.