System and method of reducing noise

摘要

In a system and method of reducing noise, an image sensor with a color filter array (CFA) outputs raw data, and a noise reduction device corrects the raw data according to distances between an original current pixel and neighboring same-color pixels in a process mask, thereby generating a new current pixel so as to output corrected raw data. A color interpolation device couples to receive the corrected raw data to result in full-color data.

主权项

1. A system of reducing noise, comprising:
an image sensor with a color filter array (CFA) placed over the image sensor configured to output raw data; a noise reduction device configured to correct the raw data according to distances between an original current pixel and neighboring same-color pixels in a process mask, thereby generating a new current pixel so as to output corrected raw data; and a color interpolation device coupled to receive the corrected raw data to result in full-color data; wherein the distances are compared with a noise threshold, respectively, wherein if the distance under comparison is smaller than the noise threshold, its associated neighboring same-color pixel is then determined as a similar neighboring same-color pixel; wherein the similar neighboring same-color pixels and the original current pixel are categorized into group 0 and group 1 along a maximum leap; the group having more pixels is determined as a selected group; and median or mean operation is performed on pixels of the selected group based on a range of the selected group, thereby obtaining the new current pixel.