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Image denoising method and device and image processing system

An image and image block technology, applied in the field of image processing, can solve the problems of color information change, high complexity of denoising method, blurred brightness information, etc.

Active Publication Date: 2015-07-01
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Claims
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Problems solved by technology

[0007] The invention solves the problems that the color information changes, the brightness information is blurred and the denoising method is highly complex in the process of image denoising

Method used

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  • Image denoising method and device and image processing system
  • Image denoising method and device and image processing system
  • Image denoising method and device and image processing system

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Embodiment Construction

[0064] In the prior art, there are problems in the process of image denoising and denoising that the color information changes, the brightness information is fuzzy, and the algorithm complexity is high.

[0065] In order to solve the above problems, the technical solution of the present invention provides an image denoising method.

[0066] The technical scheme of the present invention is described in detail below in conjunction with embodiment and accompanying drawing

[0067] figure 1 is a schematic flow chart of an image denoising method provided by an embodiment of the present invention, such as figure 1 As shown, when denoising an image, by moving the search window, the first image block corresponding to each search window is determined, and the pixels of the first image block corresponding to the search window are determined by the search window The pixel points of the included image, the first image block is denoised until the search window completes the traversal of ...

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Abstract

Disclosed are an image denoising method and device and an image processing system. The method comprises determining similar blocks of a first image block in an image; based on the first image block and the similar blocks of the first image block, determining a second image block; based on the difference value of the first image block and the second image block, determining a third image block; performing wavelet transformation on the third image block, shrinking the coefficient of the wavelet transformation, and obtaining a processed third image block through inverse wavelet transformation; based on the processed third image block and the second image block, obtaining denoised image data of the first image block. The image denoising method is low in calculating amount and complexity and can eliminate color noise and brightness noise in the image simultaneously.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to an image denoising method, device and image processing system. 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, the noise can usually be simply divided into luminance noise and color noise, and color noise is particularly obvious in low-brightness environments. In terms of frequency, luminance noise is noise with a relatively high frequency, while color noise is noise with a relatively high frequency. low noise. ...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T3/40
Inventor 张乐陈敏杰朱洪波彭晓峰林福辉
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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