The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 1987
Filed:
Feb. 07, 1985
Yoshinori Hatori, Kawasaki, JP;
Masahide Kaneko, Yokohama, JP;
Kokusai Denshin Denwa Kabushiki Kaisha, Tokyo, JP;
Abstract
A system for detecting the vector of motion of a moving object on a picture screen, in which there is prepared, in addition to a picture memory for storing picture signals, a background memory for storing background picture signals. From the background memory, picture elements of a block #0b which lies at the same position on the screen as the current input block are read out and an inter-block difference B(#0', #0b) between the current input block #0' and the block #0b is calculated. If this gives rise to an uncovered background, then the above inter-block difference B(#0', #0b) between the picture memory and the background memory becomes smaller than any other inter-block differences (that is, the degree of similarity becomes the highest), and consequently, it is possible to judge that a new background portion has appeared. Incidentally, in connection with the background portion except the uncovered background, for example, a portion A' data in the picture memory and data in the background memory become identical, excepting noise components. Accordingly, in connection with this portion, the contents of the block #0 in the picture memory and the block #0b in the background memory differ little from each other, so that even if either the inter-block difference B(#0', #0) or B(#0', #0b) is chosen as a result of comparison of their magnitudes, substantially no characteristic deterioration is caused. For instance, in case of using the result of detection of movement for the movement-compensated predictive coding operation, the coding efficiency is hardly affected, even if either the block #0 or #0b is used for prediction.