Color misregistration easing system which corrects on a pixel or

Details Color misregistration easing system which corrects on a pixel or Color misregistration easing system which corrects on a pixel or

1992-08-05

1996-01-16

Groody, James J.

Television

Camera, system and detail

With plural image scanning devices

348 70, 348269, 348248, 348576, H04N 9093

Patent

active

054852030

ABSTRACT:
An encoder decomposes an input color image signal into a luminance signal and color signals, places the color signals in image memories, then fetches color signals of a given screen before and after. A detector calculates differences between the color signals to detect color misregistration either on a pixel basis or a block basis. On the other hand, color signals of a last image acquired before occurrence of color misregistration are stored in frame memories. When color misregistration is detected, a corrector reads the color signals of the last image from the frame memories, and produces correction signals. A counter carries out counting for each difference between color signals of given screens before and after, then detects a distribution of color misregistration of a screen. A selector checks the distribution of color misregistration of a screen to identify the cause of color misregistration, then selectively outputs either the input color image signal or a correction signal sent from the corrector. Thereby, color misregistration is corrected either on a pixel basis or a block basis. This prevents deterioration of image quality due to unnecessary correction.

REFERENCES:
patent: 4694329 (1987-09-01), Belmares-Sarabia et al.
patent: 5330010 (1994-07-01), Nakamura et al.
patent: 5339159 (1994-08-01), Nakamura et al.

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