| 摘要 |
PURPOSE:To provide the method of detection of a video cutting point capable of reducing a detection error due to the motion of an object and hand shake in cut and having superior detection performance. CONSTITUTION:A video data string is constituted (101) in a space and time image that is the three-dimensional arrangement of image plane coordinates (x), (y) and a time (t), and the gradient vectors (DELTAxI, DELTAyI, DELTAtI) of the space and time image at a certain time (t) are calculated (102). The gradient vector is made nearly parallel with the axis (t) since the change of luminance and color is small in the directions of (x), (y) and large in the direction of axis (t) at a cutting point due to the steep change of a pattern. Therefore, a value representing the size of the number of gradient vectors set nearly parallel with the axis (t) is found from the count values count1, count2 of a picture element which satisfy a conditional equation by using equation of diff=count2/count1 (103-105). When diff exceeds a thresh-old value theta, this time is judged as the cutting point (106). Such operation is successively performed with respect to the time (t) (107). |
