Image correction circuit, image correction method and image...

Details Image correction circuit, image correction method and image... Image correction circuit, image correction method and image...

2011-08-02

2011-08-02

Hsia, Sherrie (Department: 2422)

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

C348S631000, C348S708000

Reexamination Certificate

active

07990474

ABSTRACT:
An image correction circuit capable of easily achieving adaptive color correction on the basis of a luminance correction amount is provided. An image correction circuit includes: a luminance correction section for performing luminance correction on input image data; and a color correction section for performing adaptive color correction on input image data on the basis of the following formula (1):in-line-formulae description="In-line Formulae" end="lead"?Cout∝Cin×[1+M×(ΔY/L)]  (1)in-line-formulae description="In-line Formulae" end="tail"?where Cout represents a chrominance signal after color correction, Cin represents a chrominance signal before color correction, M represents an adaptive color correction magnitude which is a fixed positive value, ΔY represents the total amount of luminance correction by the luminance correction section, L represents a fixed positive value satisfying L<(Ymax/2), and Ymax represents maximum luminance of input image data.

REFERENCES:
patent: 6081302 (2000-06-01), Hanai
patent: 2002/0140865 (2002-10-01), Matsushita et al.

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