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US 8,135,231 B2Granted
Image processing method and device for performing mosquito noise reduction
AssigneeRealtek Semiconductor Corp.
InventorsPo-Wei Chao, Hsin-Ying Ou
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Abstract
The present invention provides an image processing method for processing an image. The method includes: detecting at least an edge in the image; determining at least a pixel window including the edge; detecting whether a mosquito noise exists in the pixel window; and filtering out the detected mosquito noise in the pixel window.
Claims11
An image processing method for processing an image, comprising:
- detecting at least an edge in the image;
- creating at least a pixel window including the edge;
- detecting whether a mosquito noise exists in the pixel window by:
- comparing the pixel window with at least a target pattern so as to
- determine whether the pixel window conforms to the target pattern;
- and
- determining whether the mosquito noise exists in the pixel window based on a degree of conformity of the pixel window to the target pattern;
- and
- filtering out the detected mosquito noise in the pixel window when the mosquito noise exists in the pixel window, wherein the filtering operation comprises:
- counting a total number of the detected mosquito noise(s) in an accumulative manner;
- and controlling the step of filtering out the detected mosquito noise in the pixel window according to the total number;
- and varying the size of a current pixel window when the total number is greater than a second threshold value.
9 more elements
An image processing device comprising:
- an edge detector, for detecting at least an edge in the image;
- a mosquito detector, coupled to the edge detector and comprising:
- a determining unit, for determining at least a pixel window including the edge;
- and a detecting unit, for detecting whether a mosquito noise exists in the pixel window, wherein the detecting unit compares the pixel window with at least a target pattern to determine whether the pixel window conforms to the target pattern, and wherein the mosquito detector determines that the mosquito noise exists in the pixel window based on a degree of conformity of the pixel window conforms to the target pattern;
- and
- a mosquito filter, coupled to the edge detector and the mosquito detector, for filtering out the detected mosquito noise when the mosquito noise exists in the pixel window, wherein the mosquito filter comprises:
- a counter, coupled to the mosquito detector, for counting a total number of the detected mosquito noise(s) in an accumulative manner;
- and a controller, coupled to the counter and the mosquito filter, for controlling the mosquito filter according to the total number, wherein the controller varying the size of a current pixel window when the total number is greater than a second threshold value, wherein the device is at least partially embodied in hardware circuitry.
5 more elements
Dependencies are inferred from the claim text.