发明名称 |
VERFAHREN ZUR BEWERTUNG DER QUALITÄTSMINDERUNG EINES VIDEOBILDES HERBEIGEFÜHRT DURCH EIN CODIERUNGSSYSTEM UND/ODER EIN SPEICHERSYSTEM UND/ODER EIN DIGITALES ÜBERTRAGUNGSSYSTEM |
摘要 |
The invention concerns a method for assessing the degradation of a video image coded by blocks of picture elements or pixels, comprising the following steps: a) selecting an input image and determining its spatial activity (SA) in an analysis window according to the following sub-steps: i) determining for each block (n, m) the transformed coefficients Fn m (i, y) by a block transform; ii) determining from the transformed coefficients Fn, m (i, y) each block spatial activity bsa; iii) determining the analysis window global spatial activity SA1; b) selecting the output image corresponding to the input image and determining said global spatial activity SA2 of the output image; c) comparing the spatial activities (SA2) and (SA1) |
申请公布号 |
DE69805642(D1) |
申请公布日期 |
2002.07.04 |
申请号 |
DE1998605642 |
申请日期 |
1998.10.01 |
申请人 |
TELEDIFFUSION DE FRANCE, PARIS |
发明人 |
BAINA, JAMAL;BRETILLON, PIERRE |
分类号 |
H04N17/00;H04N19/89;(IPC1-7):H04N17/00 |
主分类号 |
H04N17/00 |
代理机构 |
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代理人 |
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