Method for reducing mosquito noise
AssigneeTrident Microsystems (Far East) Ltd.
InventorsJun Zhang, Chun-Wei Chen, Jiande Jiang, Zheng Liu
Life of this patent
Estimating the term…
Abstract
A method of reducing mosquito noise in a digital image. As mosquito noise is often most plainly visible in the “background” of an image (e.g., the sky or some other backdrop to objects within an image), the luminance value of the background of the image is first determined. Then, the luminances of the pixels of the image are compared against this “background luminance” to determine which should be considered as part of this background. The luminances of these background pixels are then averaged so as to smooth out the representation of the background, and reduce mosquito noise.
Claims20
A method of reducing mosquito noise in an image having pixels and a representation of a background, comprising:
- determining a representative luminance value corresponding to the background, wherein the representative luminance value is a function of a comparison between a luminance value of a selected pixel in the image with a set of adjacent luminance values corresponding to luminance values of pixels that are proximate to the selected pixel;
- comparing luminance values of the pixels to the representative luminance value corresponding to the background, so as to determine a set of background pixels;
- and
- assigning to pixels of the set of background pixels average luminance values determined according to luminance values of adjacent pixels.
A computer readable medium encoded with computer-executable instructions for performing a method for reducing mosquito noise in an image having pixels and a representation of a background, the method comprising:
- a first set of instructions for determining a representative luminance value corresponding to the background, wherein the representative luminance value is a function of a comparison between a luminance value of a selected pixel in the image with a set of adjacent luminance values corresponding to luminance values of pixels that are proximate to the selected pixel;
- a second set of instructions for comparing representative luminance values of the pixels to the luminance value corresponding to the background, so as to determine a set of background pixels;
- and
- a third set of instructions for assigning to pixels of the set of background pixels average luminance values determined according to luminance values of adjacent pixels.
Dependencies are inferred from the claim text.