Patent ID: 9189831
Filing Date: 2015-11-17
Classification: G06T,H04N

Abstract:
1. An image processing method, comprising: obtaining a local brightness gain relation between an input image before a local brightness adjustment and the input image after the local brightness adjustment; and performing at least one of a noise reduction and an edge enhancement upon an image to be processed according to the local brightness gain relation to generate an output image; wherein the local brightness adjustment comprises: for each image unit of the input image: wherein the image unit of the input image comprises at least one pixel; and the step of adjusting the brightness value of the image unit according to the pixel value of the image block including the image unit in the input image comprises: providing a plurality of curve functions; obtaining a specific curve function of the plurality of curve functions corresponding to the image unit according to an average pixel value of all pixel values of the image block; and adjusting the brightness value of the image unit according to the specific curve function; wherein the step of adjusting the brightness value of the image unit according to the specific curve function comprises: performing a curve index calculation upon the image unit according to the specific curve function, and accordingly obtaining a plurality of specific curve functions respectively corresponding to a plurality of pixels included in the image unit; and adjusting a plurality of brightness values of the pixels according to the specific curve functions, respectively.