US 5,333,010 AGranted

Color misregistration easing system for a field sequential electronic endoscope system

AssigneeOlympus Optical Co., Ltd.

InventorsKazunari Nakamura, Kenji Matsunaka, Akira Watanabe

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Abstract

The present invention provides a color misregistration easing system for inputting a color image signal of a subject imaged by a field sequential type imaging device and carrying out color misregistration easing. The system comprises a color misregistration detector for using color difference signals and a luminance signal an encoder digitizes and outputs to calculate quantities of changes of color differences of time-series screens before and after, and detecting color misregistration according to the calculated quantities, an average color calculating circuit for producing averages of color differences, a decoder for using the average color differences and the luminance signal to generate a correction image signal for the subject, and a selector for outputting the correction image signal the decoder generates when the color misregistration detector determines that color misregistration is present, and outputting a color image signal when the color misregistration detector determines that color misregistration is absent. Herein, the averages of color differences are updated by the color misregistration detector only when color misregistration is not identified.

Claims21

Dependent claims

A color misregistration easing system for inputting a color image signal of a subject imaged by a field sequential imaging means and carrying out color misregistration easing, comprising:

a detecting means for using said color image signal to calculate a quantity of a change of color information of time-series screens before and after, and detecting color misregistration or an event leading to said color misregistration according to the calculated quantity;
an average color information producing means for using said color image signal to produce an average of color information of part or the whole of a screen, and updating said average color information according to a quantity of a change of varying color information of said time-series screens before and after in response to an instruction from said detecting means;
a means for generating a correction image signal of said subject using said average said average color information producing means provides;
and
a switching means for outputting said correction image signal generated by said generating means when said detecting means determines that color misregistration is present, and outputting said color image signal when said detecting means determines that color misregistration is absent.

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Dependencies are inferred from the claim text.