发明名称 |
METHODS OF SCIENCE FADE DETECTION FOR INDEXING OF VIDEO SEQUENCES |
摘要 |
A method locates scene changes in a sequence of images or frames that have been compressed without first decompressing the sequence. The sequence includes subsequences of P-frames between I-frames. DC residual coefficients including sign information are extracted from the sub-sequences of P-frames. If the number of the number of residual coefficients in the P-frames exceed a predetermined threshold, then a scene change is indicated. Positive coefficients indicate fade-ins, and negative coefficients indicate fade-outs. |
申请公布号 |
HK1029699(A1) |
申请公布日期 |
2004.02.27 |
申请号 |
HK20010100454 |
申请日期 |
2001.01.18 |
申请人 |
MITSUBISHI DENKI KABUSHIKI |
发明人 |
SUN, HUIFANG;ITO, HIROSHI;POON, TOMMY C.;DIVAKARAN, AJAY |
分类号 |
H04N5/262;H04N5/14;H04N5/92;H04N7/26;H04N7/32;H04N7/50;(IPC1-7):H04N |
主分类号 |
H04N5/262 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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