Television – Image signal processing circuitry specific to television – Motion vector generation
Patent
1993-10-26
1995-12-26
Britton, Howard W.
Television
Image signal processing circuitry specific to television
Motion vector generation
H04N 732
Patent
active
054792185
ABSTRACT:
By expanding the technique of detection of a motion vector by the of time-space differential method, (1) repetitive calculations are not needed, (2) different motion vectors near the boundary of an object can be detected, and (3) coupling of the region segmentation and the framework is enabled. For this, a horizontal direction differentiating filter (104), a vertical direction differentiating filter (105), and a time direction differentiating filter (106) calculate the time-space differential (.differential.I/.differential.x, .differential.I/.differential.y, .differential.I/.differential.t) in formula (2) necessary for motion vector estimation in every pixel. A feature vector combining part (110) generates a sample vector coupling the time-space differential value and position for a random image position (x, y), and clusters from pairs of samples and classes, to minimize the difference in a maximum likelihood class determining part (112) and a maximum likelihood class data changing part (113). The motion vector is obtained from the third eigen vector of covariance matrix of the time-space differential value.
REFERENCES:
patent: 5166788 (1992-11-01), Lee
patent: 5212548 (1993-05-01), de Haan
patent: 5257102 (1993-10-01), Wilkinson
patent: 5327232 (1994-07-01), Kim
Proceedings 1991 IEEE Computer Society Conference on Computer Vision and Pattern Recognition; Lahaina, Maui, Hawaii, Jun. 3-6, 1991, IEEE Computer Society Press Los Alamitos, Calif., US, XP337374 Mark Allmen et al. "Long-Range Spatiotemporal Motion Understanding Using Spatiotemporal Flow Curves"; p. 305, right column, paragraph 3 --p. 307, paragraph 4.
Systems & Computers In Japan, vol. 18, No. 5, May 1987, New York US pp. 36-46; Masanobu Yamamoto, "Three-dimensional Motion Analysis of Scene Containing Multiple Moving Objects from Image Sequence and Depth"l; p. 40, left column, paragraph 5 --p. 41, right column, paragraph 5.2.
Britton Howard W.
Matsushita Electric - Industrial Co., Ltd.
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