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- W2052240429 abstract "When communicating at a very-low bit-rate, video coders are unable to preserve high visual quality for all images. A selection of key regions according to human viewing and understanding may therefore be useful: it allows extracting essential features and to code them with a high quality, while the remainder of the image is coarsely transmitted. Such an approach requires a signal decomposition allowing an adaptive spatial variant bit allocation. Matching pursuits (MP) explicitly select the information to be transmitted among a large and overcomplete set of functions and quantize it according to a fixed and constant step. For MP, bit allocation is equivalent to function selection. This makes matching pursuits well suited for spatial variant bit allocation, since functions matched to important objects can be chosen. In this paper, we first show the abilities of matching pursuits to allocate an available bit-budget according to a semantic understanding of the scene. This semantic information can be provided either automatically or interactively. Second, the possibility to incorporate perceptive criteria within the MP coding algorithm is investigated." @default.
- W2052240429 created "2016-06-24" @default.
- W2052240429 creator A5012049713 @default.
- W2052240429 creator A5015968689 @default.
- W2052240429 date "2001-04-01" @default.
- W2052240429 modified "2023-10-03" @default.
- W2052240429 title "Content-based and perceptual bit-allocation using matching pursuits" @default.
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- W2052240429 doi "https://doi.org/10.1016/s0923-5965(00)00039-4" @default.
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