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A low-illuminance image enhancement method, device and image processing equipment

An image enhancement and low-illumination technology, applied in the field of digital images, can solve the problem that the low-illumination image enhancement scheme cannot adaptively adjust and increase the level

Active Publication Date: 2021-05-25
CHINA MOBILE COMM LTD RES INST +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-illuminance image enhancement method, device and image processing equipment to solve the problem that the low-illuminance image enhancement scheme in the prior art cannot adaptively adjust the increase level

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  • A low-illuminance image enhancement method, device and image processing equipment
  • A low-illuminance image enhancement method, device and image processing equipment
  • A low-illuminance image enhancement method, device and image processing equipment

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Embodiment Construction

[0077] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0078] The present invention aims at the problem that the low-illuminance image enhancement scheme in the existing technology cannot adaptively adjust the increase level, and provides a low-illuminance image enhancement method, such as figure 1 shown, including:

[0079] Step 11: Obtain the brightness index parameter value of the image to be processed;

[0080] Step 12: When the brightness index parameter value is lower than a first preset threshold, according to the brightness index parameter value, obtain the control parameter value of the brightness enhancement function;

[0081] Step 13: Perform brightness enhancement on the image to be processed according to the control parameter value.

[0082] The low-illuminance image enhancement method provide...

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Abstract

The present invention provides a low-illuminance image enhancement method, device, and image processing equipment, wherein the low-illuminance image enhancement method includes: acquiring the brightness index parameter value of the image to be processed; when the brightness index parameter value is lower than the first preset When the threshold is reached, a control parameter value of a brightness enhancement function is acquired according to the brightness index parameter value; brightness enhancement is performed on the image to be processed according to the control parameter value. This solution can automatically detect the brightness of the image, so as to adaptively adjust the level of image enhancement, that is, the darker the image, the higher the stretching degree of brightness, and the image with normal illumination does not change the brightness; to achieve the fully automatic processing of the image enhancement process , no longer rely on manual adjustment of image brightness enhancement parameters; and the image enhanced by this scheme will not be over-enhanced and local noise; it solves the problem that the low-light image enhancement scheme in the prior art cannot adaptively adjust the increase level.

Description

technical field [0001] The invention relates to the technical field of digital images, in particular to a low-illuminance image enhancement method, device and image processing equipment. Background technique [0002] At present, the schemes of image enhancement mainly include: (a) method based on Retinex theory (computational theory of color constant perception); (b) method based on RGB equal proportional gain; (c) a method proposed in patent application number 201310590343.3 Low-light image enhancement method. The Retinex theory believes that an image can be decomposed into the product of the illuminance image and the reflection image. The brightness of the image is determined by the illuminance image and the reflection image. The illuminance image is related to the light source. In the application, the illuminance component needs to be removed to obtain the real image color. Based on the RGB proportional gain theory, any color image can be composed of different proportion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 温建伟
Owner CHINA MOBILE COMM LTD RES INST
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