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:
Jul. 24, 2001
Filed:
Jul. 11, 1997
Satoshi Katoh, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A method and a circuit for producing good edge crispening effect by an out-of-green method is not affected by the colors of the subject imaged by a color image sensor. The edge crispening circuit includes first and second arithmetic units, a comparator, and a decision circuit. The first arithmetic unit calculates the ratio of the magnitude of an input blue (B) signal to the magnitude of an input green (G) signal. The second arithmetic unit calculates the ratio of the magnitude of an input red (R) signal to the magnitude of the green (G) signal. The comparator compares these two ratios and selects a larger one. The decision means compares the coefficient selected by the comparator means with a reference value &agr; and produces a coefficient k. The magnitudes of the edge crispening signal to be added to the R, G, B signals, respectively, are determined from the coefficient k. Finally, weighted edge crispening signals are added to the R, G, B signals, respectively.