Patent ID: 6292586
Filing Date: 2001-09-18
Classification: G06F

Abstract:
A dynamic image compression apparatus in which image signals representing a plurality of image frames sequentially generated are inputted, a movement vector of the image frame-to-image frame is evaluated in accordance with the input image signals, and the movement vector can be transmitted instead of transmission of the image signals, said dynamic image compression apparatus comprising:correlation arithmetic means for applying to two functions a (x, y) and b (x, y), which represent two image frames, respectively, an operation set forth belowc(.DELTA.x,.DELTA.y)=.SIGMA..sub.x.SIGMA..sub.y a(x,y)*b(x+.DELTA.x,y+.DELTA.y) (1a)where an operation g*h between optional two numbers g and h stands for an operation in which a sum .vertline.g.vertline.+.vertline.h.vertline. of absolute values of g and h is given as an absolute value .vertline.g*h.vertline. of an operation result by the operation g*h, and a plus and a minus are assigned to signs of the operation result by the operation g*h in compliance with either one of a match and a mismatch of polarities of g and h and the other, respectively; andmovement vector detection means for detecting a peak point of an operation result c(.DELTA., .theta.) in said correlation arithmetic means to derive the movement vector between the two image frames.