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:
Apr. 20, 2004
Filed:
Jun. 21, 1996
Fumihiko Sudo, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A video camera system capable of matching colors between configured video cameras by effectively reducing color differences therebetween. A red, a green and a blue signal from imaging devices are amplified by preamplifiers and video amplifiers before being fed to a color matching circuit. The color matching circuit performs color matching in accordance with the levels of the red, green and blue signals using variables of gains and DC offset values. The gains and DC offset values are determined by the color matching circuit executing predetermined operation expressions. With a plurality of colors imaged in advance by the video cameras to be matched in color with a reference video camera, necessary coefficients of the operation expressions are obtained by use of the level measurements (tristimulus values) of the red, green and blue signals from an integrating circuit of each camera. Executing the operation expressions thus obtained allows the matching circuit to absorb the color differences between the reference video camera on the one hand, and the video camera to be matched in color therewith on the other hand.