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Method and device for removing color noise

A noise and color technology, applied in the field of a method and a device for removing color noise, can solve problems such as image saturation drop, color aliasing, and easily affecting image brightness information.

Active Publication Date: 2019-04-30
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Claims
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Problems solved by technology

[0008] The problem solved by the present invention is that when removing color noise from an image, it is easy to affect the brightness information of the image, which will cause blurred image brightness information, color aliasing, and a decrease in image saturation, and the problem of high complexity

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  • Method and device for removing color noise

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Embodiment Construction

[0072] In the prior art, when color noise is removed from an image, brightness information of the image is easily affected, resulting in fuzzy brightness information of the image, color aliasing, and decrease in saturation of the image, and the problem of high complexity.

[0073] In order to solve the above problems, the technical solution of the present invention provides a method for removing color noise.

[0074] The method can realize the removal of color noise in the image data of the U and V channels of the image. The image needs to be in YUV format. If the image is in other color formats, such as RGB format, etc., the color of the prior art can be used. The spatial conversion method converts the image to YUV format.

[0075] For an image in YUV format, for each pixel in the image, each pixel corresponds to three components, namely Y component, U component and V component, and each component corresponds to a component value used to indicate the The size of the componen...

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Abstract

A method and device for removing color noise, the method includes: acquiring a first image, the first image is image data obtained after adaptive downsampling processing on an image in a sliding window; The U and V component values ​​of the noise pixel determine the value range coefficient of the pixel point of the first image; determine the spatial domain coefficient of the first image pixel point according to the spatial distance with the pixel point to be denoised; obtain from the pixel point value domain and the spatial domain coefficient Weighting coefficient; based on the weighting coefficient, perform color noise processing on the U and V components of the pixel to be denoised. This method improves the frequency of the color noise of the image in the sliding window through adaptive downsampling processing, making it easier to be removed, reducing the amount of calculation, and improving the calculation performance; it effectively solves the color aliasing and saturation reduction generated when removing color noise The problem of reducing the influence of brightness information will not cause image brightness information to be blurred, the complexity is low, and it is easy to implement.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and a device for removing color noise. Background technique [0002] Image denoising is a widely used technology in image processing. The purpose of image denoising is to improve the signal-to-noise ratio of the image and highlight the desired features of the image. [0003] At present, typical image sensors include CCD and CMOS. When collecting images based on image sensors, the images are easily affected by various factors during the process of acquisition and transmission, so that the images collected by image sensors often contain noise. Image. [0004] Because the noise signal and the image signal in the noise-containing image are mixed together, the image has problems such as inconspicuous features and low definition. Therefore, it is usually necessary to perform denoising processing on the image collected by the image sensor to improve the signal-to-noise of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 张乐朱洪波谭乐怡王微彭晓峰王浩
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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