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Image noise reduction method and system thereof

An image noise reduction and noise reduction technology, which is applied in the field of image processing and can solve the problems of smearing of details in high-brightness areas, serious noise in low-brightness areas, and poor noise reduction effect.

Active Publication Date: 2016-03-30
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology

One is to use the overall noise reduction method. In this method, if the noise reduction degree is large, the details in the high-brightness area will be wiped out; if the noise reduction degree is small, it will cause serious noise in the low-brightness area; The best way is to denoise the image in different regions; but no matter which way, there will be plaques after denoising, and the denoising effect is poor.

Method used

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  • Image noise reduction method and system thereof
  • Image noise reduction method and system thereof
  • Image noise reduction method and system thereof

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0023] In order to facilitate the understanding of the solution of the present invention, noise will be firstly described below.

[0024] There will be two kinds of noise in images taken under low light. The first type is color noise, with color, which will be very obvious in the face and dark parts (black parts with no light or extremely low light on the photo); the second type is white noise. Noise, similar to snowflakes on TV, black and white, is obvious in the dark part, but appears in the face and the illuminated part, it is not particularly obvious from the user's ...

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Abstract

The invention relates to an image noise reduction method and a system thereof. The method comprises the following steps of identifying a face area in an image whose noise needs to be reduced and filtering a color value of a non-skin color pixel point in the face area; identifying a dark portion area in the image whose noise needs to be reduced and carrying out gray processing on the dark portion area; and carrying out white noise reduction processing on a current image, wherein the current image is the image whose noise needs to be reduced after color value filtering of the non-skin color pixel point and the gray processing. By using a scheme in the invention, a noise reduction effect of the image can be increased.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image noise reduction method and system. Background technique [0002] With the development of science and technology, the functions of terminals such as mobile phones, tablet computers, and cameras have also been continuously improved. At the same time, with the popularization of digital products, images have become the most commonly used information carriers in human activities. They contain a large amount of information about objects and become the main way for people to obtain original information from the outside world. [0003] Terminal devices such as mobile phones or tablet computers have become common tools for image capture. The photosensitive device used by the camera of this type of terminal equipment has relatively large noise, especially when the light is low and a high ISO (sensitivity) scene is required, the captured video noise is very obviou...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/70
Inventor 吴磊
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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