Moving vector extractor

Details Moving vector extractor Moving vector extractor

1991-10-16

1995-07-04

Groody, James J.

Television

Camera, system and detail

Camera image stabilization

348416, H04N 718

Patent

active

054304792

ABSTRACT:
A moving vector extractor for detecting a shaking of an image through a video camera in order to improve accuracy of the detection. Even when the image is dark or of low density gradient as a whole, a density gradient value around representative point is calculated. Basic data of moving vector of the difference value between successive frames is obtained by calculating an absolute value or a squared value. The basic data of the moving vector is weighted according to a density gradient value so as to improve the precision of moving vector extraction.

REFERENCES:
patent: 5019901 (1991-05-01), Uomori et al.
patent: 5030984 (1991-07-01), Buckler et al.
patent: 5099323 (1992-03-01), Morimura et al.
patent: 5101278 (1992-03-01), Itsumi et al.
patent: 5111511 (1992-05-01), Ishii et al.
Chaudhuri et al., "The Equivalence of Best Plane Fit Gradient with Robert's, Prewitt's and Sobel's Gradient for Edge Detection and a 4-Neighbour Gradient with Useful Properties", Signal Processing, 1984, pp. 143-151 Patent Abstracts of Japan, vol. 010, No. 137.
Morimura et al., "Automatic Images Stabilizing System by Video Signal Processing", The Journal of Institute of Television Engineers of Japan, 1991, pp. 43-48.
Ninomiya et al., "A Motion Vector Detector for MUSE Encoder", The Journal of Institute of Television Engineers of Japan, 1985, pp. 25-30.

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