Image noise reduction method and device
An image noise reduction and noise reduction technology, applied in the field of image processing, can solve problems such as suppression or removal
Active Publication Date: 2021-10-01
HANGZHOU HIKVISION DIGITAL TECH
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For this kind of unnatural and indescribable noise, the existing noise reduction methods cannot suppress or remove it.
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[0087] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0088] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.
[0089] figure 1 It is a schematic flow chart of the image noise reduction method provided in the embodiment of the present application, figure 1 The shown method at least includes the following steps: ...
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The embodiment of the invention provides an image noise reduction method and device. The method comprises the following steps: acquiring a structure image of a target image; based on any pixel point in the target image, calculating a matrix correlation coefficient between a pixel reciprocal matrix of the pixel point and a pixel reciprocal matrix of pixel points which correspond to the pixel point and are located in the structural image; calculating a first weight coefficient and a second weight coefficient of the pixel point according to the matrix correlation coefficient; according to the first weight coefficient, the second weight coefficient, a first preset noise reduction algorithm and a second preset noise reduction algorithm, performing noise reduction processing on the target image; and according to the scheme, based on the matrix correlation coefficient, determining the weight coefficient for noise reduction by using the first preset noise reduction algorithm and the weight coefficient for noise reduction by using the second preset noise reduction algorithm, so that different noise reduction processing on each pixel point in the target image is realized, and then suppression or removal of noise which does not have global consistency, is unnatural and cannot be described in form in the target image is realized.
Description
technical field [0001] The present application relates to the technical field of image processing, in particular to an image noise reduction method and device. Background technique [0002] In recent years, with the rapid development of information technology, video surveillance has been widely used in many fields such as intelligent transportation and security. Due to the changeable monitoring scenes and environments in video surveillance, there will be more noise information in the collected images. In order to improve the image quality, it is necessary to perform noise reduction processing on the collected images. At present, the commonly used noise reduction methods include isotropic filters such as Gaussian filtering, mean filtering, and median filtering, as well as anisotropic filters such as bilateral filtering, guided filtering, and non-local mean noise reduction algorithms. [0003] However, in the current front-end surveillance camera products, many modules of Ima...
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IPC IPC(8): G06T5/00G06T5/50
CPCG06T5/50G06T2207/20221G06T5/90G06T5/70
Inventor 张彩红
Owner HANGZHOU HIKVISION DIGITAL TECH