Français
2. Basic concepts
The principle of digital image compression is based on the passage from a matrix of pixel luminosity values to a matrix of coefficients translating visual frequencies, i.e. pixel-to-pixel variations, making it possible to code more homogeneous "flat" zones or zones of detail. It is the analysis of this latter matrix that will eliminate redundancy and thus reduce the volume of data. Since this operation involves numbers and their relationships, two mathematical tools are used:
DCT (Discrete Cosine Transform), based on Fourier analysis, analyzes and processes the image by blocks of pixels; it is used by almost all image compression formats (JPEG, MPEG, etc.);
the DWT transform (Discrete Wavelet Transform ), which simultaneously analyzes and processes all the pixels in the image; it is used by JPEG 2000 and some...
The Ultimate Scientific and Technical Reference
This article is included in
Signal processing and its applications
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Basic concepts
Main features of JPEG 2000
Bibliography
Works
Standards and norms
- Fichiers d'exploitation et d'échange des œuvres cinéma - CST-RT021-part1:2013 - 2013
- Specification Format Mezzanine - CST-RT021-part2:2013 - 2013
- Digital Cinema System Specification Version 1.2 October 10, 2012 http://www.dcimovies.com/DCIDigitalCinemaSystemSpecv1_2.pdf - DCI 2005-2012 - 2012
- Digital Video Broadcasting (DVB); Specification for the use of Video and Audio Coding in Broadcasting Applications...
Directory
Manufacturers – JPEG 2000 circuit integrators (non-exhaustive list)
Alma-Technologies https://www.alma-technologies.com/ip-core.JPEG-2000
Barco-Silex https://www.silexinsight.com/
The Ultimate Scientific and Technical Reference
