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:
Aug. 09, 2005
Filed:
May. 08, 2001
Naoki Toyama, Osaka, JP;
Yoshiki Yamada, Osaka, JP;
Naoki Toyama, Osaka, JP;
Yoshiki Yamada, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A video mixing apparatus carries out a chromakey process producing less degradation of picture quality by generating a key signal which separates a foreground object component from a screen component by using luminance information. In a three-dimensional color space, a smaller oval body surrounding a region where the foreground object is distributed and a larger oval body surrounding the smaller one are set. These two oval bodies and a distribution of a source video signal determine a key signal distribution. Key signal K=0 (zero) when the source video signal is inside the smaller oval body, and K=1 (one) when the signal is outside the larger oval body. 0<K<1 when the signal is between the smaller and the larger oval bodies. Based on the key signal K generated, the source video signal is mixed with the background video signal.