[54] MOVING VECTOR DETECTING DEVICE
[75] Inventor: Katsuji Igarashi, Tokyo, Japan
[73] Assignee: Sony Corporation, Tokyo, Japan
[21] Appl. No.: 861,583
[22] Filed: Apr. 1,1992
[30] Foreign Application Priority Data
Apr. 12, 1991 [JP] Japan 3-108816
[51] Int. CI.* G06K 9/36; H04N 5/917;
H04N 7/32
[52] U.S. CI 382/238; 348/415
[58] Field of Search 382/56; 358/133, 135,
358/136, 105
[56] References Cited
U.S. PATENT DOCUMENTS
4,777,530 10/1988 Kondo 358/160
4,924,305 5/1990 Nakagawa et al 358/105
4,937,666 6/1990 Yang 358/136
5,047,850 9/1991 Ishu et al 358/105
5,068,726 11/1991 Kondo et al 358/135
5,111,511 5/1992 Ishiietal 382/1
5,157,732 10/1992 Ishii et al 382/1
5,173,771 12/1992 Kitazato 358/105
FOREIGN PATENT DOCUMENTS 407273 6/1990 European Pat. Off. .
A motion vector detecting apparatus using the minimum residual difference between corresponding picture elements from two consecutive frames and an interpolation circuit to develop a moving vector with half-picture-element pitch accuracy. A residual difference is obtained by comparing each frame of an image signal fed into the apparatus with each previous frame. A solution vector is obtained by taking the minimum value of the absolute values of the residual differences. The solution vector is adjusted by a correction value, which is determined by interpolating extreme values in the vicinity of this solution vector and taking a minimum therefrom, to obtain the half-picture-element pitch solution vector.
6 Claims, 4 Drawing Sheets
