| 摘要 |
PROBLEM TO BE SOLVED: To exclude the undefined motion vectors which are dependent on the noises and to use only a vector that has high reliability by analyzing an array of correlation value obtained from a correlative operation carried out between a reference image and a search image to decide the reliability of a motion vector. SOLUTION: A correlative operation means 3 defines an image of a certain time as a reference image with an image defined at the next time as a search image, refers to the image memories A1 and B2 to carry out a correlative operation between both reference and search images and outputs an array of correlation value. A minimum correlation value calculation means 4 calculates the minimum correlation value and the coordinates where the minimum correlation value is given from the entire array of correlation value. A partial minimum value calculation means 5 calculates the minimum correlation value included in a range where the distances smaller than the prescribed value are excluded from the coordinates obtained by the means 4, i.e., the partial minimum value. Then a reliability deciding means 6 decides and outputs a motion vector of high. reliability when the difference is larger than the prescribed value between the partial minimum value and the minimum correlation value.
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