DEVICE FOR FOLLOWING AND ESTIMATING THE LOCAL STATE OF PICTURE CONTOURS

摘要

A device for following and recursively estimating the local state of picture contours defined by lines of N points distributed in accordance with an orthogonal sampling structure, said points being defined by successive numerical samples, According to the invention said device comprises: A) a sequential memory having three sections, B) an examination circuit incorporating means for detecting the variation of the value of samples belonging to the same line and belonging to two adjacent lines , means for detecting and counting contour elements, C) a recursive loop for calculating the state of the contour. The invention also relates to a differential coded pulse modulation coder,and a differential coded pulse modulation decoder.