Method of detecting motion vector, apparatus therefor, and picture signal processing system utilizing the apparatus

摘要

PCT No. PCT/JP92/00659 Sec. 371 Date Dec. 21, 1992 Sec. 102(e) Date Dec. 21, 1992 PCT Filed May 22, 1992 PCT Pub. No. WO92/21210 PCT Pub. Date Nov. 26, 1992.An apparatus capable of detecting with improved accuracy a motion vector representing an object moved on a picture plane comprises a memory section for storing an input picture signal renewed for every predetermined time interval, a spatial filter section for applying a spatial band limitation to two signal portions of the renewed picture signal stored in the memory, which signal portions corresponding to the different time intervals, and a detecting section including at least one detecting stage for detecting the motion vector in accordance with the gradient method on the basis of the two picture signals and a minute value to be added to a gradient determined from one reference picture signal represented by one of the two picture signals.