Television – Image signal processing circuitry specific to television – Motion dependent key signal generation or scene change...
Patent
1995-06-02
1997-02-25
Chin, Tommy P.
Television
Image signal processing circuitry specific to television
Motion dependent key signal generation or scene change...
348 19, H04N 5272, H04N 141
Patent
active
056063768
ABSTRACT:
A differential/absolute value image is derived by calculating an absolute value of each pixel in an image produced by subtracting a background image from an input image. A mean value and a variance of a pixel in the differential/absolute value image are calculated from the levels of pixels included in a small region on the differential/absolute value image which has the pixel located at the center thereof. The calculated mean value and variance of the pixel are used to distinguish whether the pixel is a pixel included in a moving object existing region, a background region, or an input image sudden change region. A method of updating the background image is changed in accordance with whether the pixel is a pixel included in the moving object existing region, the background region, or the input image sudden change region.
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I-Sheng Tang, et al, "Extraction of Moving Objects in Dynamic Scenes", Proceedings of the 6th International Conference on Pattern Recognition, Munich, Oct. 20-22, 1982; IEEE, New York, NY, U.S., pp. 1143-1146.
Patent Abstracts of Japan, vol. 13, No. 172 (P-862) 24 Apr. 1989 & JP-A-10 007174 (Mitsubishi Electric Corporation) 11 Jan. 1989.
Chin Tommy P.
Matsushita Electric - Industrial Co., Ltd.
Vincent David R.
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