发明名称 |
MOVING PICTURE RECOGNIZING METHOD AND MOVING PICTURE RECOGNIZING AND RETRIEVING METHOD |
摘要 |
<p>PROBLEM TO BE SOLVED: To directly recognize and retrieve a specific pattern from compressed moving picture data through the use of the parameter of maximum likelihood with respect to a symbol string by extracting a DCT coefficient from image data and transforming its feature vector string to the symbol string. SOLUTION: One frame of image data is divided by MPEG data 1 to obtain the DCT(discrete cosine transformation) coefficient of each unit. Next, a feature extraction part 2 fetches the frame feature vector of a low frequency component. Similarly, the feature vector string of a series of moving picture data is fetched and recorded in a memory for storing feature 3. Next, a quantization part 4 vector-quantizes it and records the symbol string in a symbol storing memory 5. A model parameter estimating part 6 estimates the parameter of such a state transition model as generates this symbol string and records it in a state transmission model storing memory for recognition 7. A likelihood calculating part 8 estimates the parameter of the model of high likelihood for each category of a recognizing object and stores it in a memory for a recognizing result 9. Thereby the specific moving picture pattern is recognized and retrieved from compressed moving picture data.</p> |
申请公布号 |
JPH1013832(A) |
申请公布日期 |
1998.01.16 |
申请号 |
JP19960164430 |
申请日期 |
1996.06.25 |
申请人 |
NIPPON TELEGR & TELEPH CORP <NTT> |
发明人 |
YAMATO JUNJI;MURASE HIROSHI |
分类号 |
H04N19/60;G06F17/30;G06T7/20;H04N19/102;H04N19/136;H04N19/139;H04N19/179;H04N19/189;H04N19/20;H04N19/423;H04N19/503;H04N19/51;H04N19/61;H04N19/625;H04N19/85;H04N19/94;(IPC1-7):H04N7/30 |
主分类号 |
H04N19/60 |
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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