Invention Grant
US08154629B2 Noise canceling circuit, noise canceling method, and solid-state imaging device 有权
降噪电路,降噪方法和固态成像装置

Noise canceling circuit, noise canceling method, and solid-state imaging device
Abstract:
A noise canceling circuit that includes a sharp/flat-part determining unit that determines whether a neighborhood of a target pixel in a digital video signal is a sharp part or a flat part by calculating a sharpness value indicating sharpness and an approximate noise value approximately indicating a noise value included in the target pixel based on pixel values of the target pixel and a predetermined number of pixels inputted immediately before and after the target pixel, and comparing the sharpness value and the approximate noise value, a noise extracting unit that extracts the noise value of the target pixel by performing a noise extraction corresponding to a result of the determination performed by the sharp/flat-part determining unit, and a correcting unit that corrects the pixel value of the target pixel by using the extracted noise value of the target pixel.
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