Patent ID: 8559745
Filing Date: 2013-10-15
Classification: H04N

Abstract:
1. An image signal processor for image enhancement, receiving a first, a second, and a third component of a color signal of each pixel of an image, comprising: an image enhancer for performing image enhancement on the first component of the color signal to produce a first enhanced component of the color signal; a gain generator, coupled to the image enhancer, for producing an enhancement gain based on the first component and the first enhanced component of the color signal; and a gain multiplier, coupled to the gain generator, for performing image enhancement on the second and the third component based on the enhancement gain to produce a second and a third enhanced component, wherein the image enhancer further comprises: a noise reduction unit for receiving the first component, performing noise reduction on the first component and producing a noise-reduced component; a sharpness enhancement unit for receiving the first component, performing sharpness enhancement on the first component and producing a sharpness enhanced component; an edge detection unit for detecting edges of irrelevant figures in the image and determining the relationship between the pixel and the edges; a blending unit, coupled to the noise reduction unit, the sharpness enhancement unit, and the edge detection unit, for blending the noise-reduced component with the sharpness enhanced component to produce the first enhanced component according to the relationship determined by the edge detection unit.