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:
Jan. 05, 1993
Filed:
Jul. 17, 1991
Yasushi Takagi, Yokohama, JP;
Takuya Imaide, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A white balance controller for an image pickup apparatus having an image pickup for providing an output indicative of an image, a color separator responsive to the output of the image pickup for producing a luminance signal and a plurality of color signals therefrom, gain controllers for controlling a gain of at least two color signals of the plurality of color signals separated by the color separator, and a color difference signal generator for generating color difference signals from at least one of a color signal and luminance signal. The white balance controller includes white/achromatic detection for detecting at least one of a white and achromatic portion within an image picked up by the image pickup in accordance with a least the color difference signals, and an abnormality detector for detecting an abnormality of white balance within the picked up image. The abnormality detector supplies an output thereof to an input of the white/achromatic detector and enables control of a gain of the gain controllers in accordance therewith for enabling white adjustment.