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Noise suppression method and device

A noise suppression and noise technology, applied in the field of noise suppression methods and devices, can solve the problems of loss of image detail denoising method, large amount of calculation, blurred images, etc., achieve effective noise suppression processing, simple calculation method, and ensure clarity Effect

Active Publication Date: 2016-01-06
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

[0008] The present invention solves the problem that when removing color noise from an image, it is easy to cause image blurring, loss of image details, complex denoising method, and large amount of computation

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Embodiment Construction

[0050]In order to improve image quality, it is necessary to suppress image noise. Generally, various low-pass filters can be used to realize the denoising function of the image, but in the process of using the low-pass filter to denoise, a certain algorithm template needs to be used. Due to the low spatial frequency of the color noise in the image, in order to effectively remove the color noise with a lower frequency, it is necessary to use a larger algorithm template than that used to remove the luminance noise, which will make the calculation amount of the denoising larger, and because With the use of large-scale algorithm templates, the blurring effect on the image caused by the characteristics of the low-pass filter will be more obvious, which seriously affects the imaging quality of the image.

[0051] In the prior art, when color noise is removed from an image, there are problems that the image is easily blurred, image details are lost, the denoising method is complex, a...

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Abstract

A noise suppression method and device which are used for suppressing color noise in images. The method includes: determining a target range of noise suppression in a chrominance component space based on a luminance component value of a pixel, wherein the chrominance component space is a horizontal coordinate space composed of a first chrominance component and a second chrominance component; determining a suppression coefficient corresponding to the pixel according to a distance between a position corresponding to the pixel in the chrominance component space and the target range; adjusting a first chrominance component value and a second chrominance component value of the pixel based on the suppression coefficient corresponding to the pixel to realize suppression process of the color noise of the pixel. According to the invention, the method can adaptively eliminate the color noise in the images, the computing method is simple, original picture details in the images can be retained, the sharpness of the image frames can be ensured, and the imaging quality of the images can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a noise suppression method and device. 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] In the process of shooting digital images, noise exists in all aspects of the shooting process. For example, images are easily affected by various factors during the process of acquisition and transmission, so that images collected by image sensors often contain noise. The presence of noise will degrade the imaging quality of the image. [0004] Because the noise signal and the image signal in the image containing noise are mixed together, the image has problems such as inconspicuous features and low definition. Therefore, it is usually necessary to denoise the image collected by the image sensor to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 彭晓峰张乐朱洪波牛海军王浩
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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