Patent ID: 8416323
Filing Date: 2013-04-09
Classification: G06T,H04N

Abstract:
1. A noise reduction method for use in an image processing device to reduce noise of an image, the method comprising steps of: defining a target window having dimensions defined by a first chrominance range and a second chrominance range, respectively; determining a noise threshold value according to whether an input pixel of the image is located inside the target window by a threshold value generating unit; determining whether a pixel value of the input pixel needs to be adjusted according to the noise threshold value and pixel values of neighboring pixels of the input pixel by a determining unit; and adjusting the pixel value of the input pixel by an adjusting unit when the input pixel is determined as needing to be adjusted; wherein the step of adjusting the pixel value of the input pixel when the input pixel is determined as needing to be adjusted comprises performing an adjusting calculation based on the pixel value of the input pixel and the mean pixel value of the neighboring pixels of the input pixel, and the adjusting calculation is expressed as: