Method of processing an image signal with the result from...

Details Method of processing an image signal with the result from... Method of processing an image signal with the result from...

Filed on

2005-05-24

Date issued

2005-05-24

Examiner

Le, Que T. (Department: 2878)

Patent Class

Radiant energy

SubClass

Photocells; circuits and apparatus

SubSubClass

Photocell controlled circuit

Other Related Categories

C348S272000

Type

Reexamination Certificate

Status

active

Patent number

06897425

Description

ABSTRACT:
In a digital camera, an image pickup section feeds pixel data to a signal processor that uses green pixel data as high-frequency luminance data. To generate luminance for a subject pixel that is either a red pixel or a blue pixel, the signal processor determines a direction of correlation by using the subject pixel and pixel data identical in color with the subject pixel and adjoining it in horizontal and vertical directions. The signal processor then generates, based on the subject pixel and the pixel data used for the above decision, a color complementary to green as high-frequency luminance data while attaching a flag indicative of the direction of correlation to the pixel data. Further, by comparing flag patterns, the signal processor corrects the above flag and then generates high-frequency luminance data from pixel data positioned in a direction indicated by the flag. This obviates a difference in level between nearby pixels in a direction of length.

REFERENCES:
patent: 6469290 (2002-10-01), Suzuki
patent: 2000-184386 (2000-06-01), None

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