Image processing apparatus and method for color-noise reduction

Details Image processing apparatus and method for color-noise reduction Image processing apparatus and method for color-noise reduction

2011-03-29

2011-03-29

Ho, Tuan (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

Reexamination Certificate

active

07916189

ABSTRACT:
In a color-noise reduction circuit in which a color-difference signal of a target pixel is substituted in a random substitution circuit (104) by a color-difference signal of another pixel within an area including the target pixel, a pixel-substitution color-difference signal that is the substituted signal whose high-frequency components are removed in an LPF (106) and the color-difference signal of the target pixel are added together in a summation circuit (108) at a predetermined ratio obtained by a pixel-substitution utilization rate calculation circuit (107), and is outputted as a noise-reduced color-difference signal of the target pixel. Therefore, efficient color-noise reduction and suppression of occurrence of color jitters can be realized.

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