Low-illumination color image enhancement method and device

A color image and low-light technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of not truly reflecting the color information of the original scene, high equipment prices, and amplifying noise components, so as to ensure immediacy and effectiveness performance, overcome the difficulty of processing, and solve the effects of enhancement and denoising

Active Publication Date: 2021-02-09
NANJING UNIV OF POSTS & TELECOMM
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, images of low-light scenes are mostly captured through devices such as image intensifiers and thermal imagers. However, these devices are not only expensive, but also cannot truly reflect the color information of the original scene.
[0004] Now

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  • Low-illumination color image enhancement method and device
  • Low-illumination color image enhancement method and device
  • Low-illumination color image enhancement method and device

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Embodiment 1

[0058] This embodiment provides a low-illuminance color image enhancement method, which effectively solves the enhancement and denoising of low-illuminance color images. At the same time, the algorithm has short running time, high efficiency, and more complete image detail preservation.

[0059] The method realization step that the present invention proposes is specifically as follows:

[0060] Step S1: Continuously acquire n groups (each group contains the same number of frames) of low-illuminance color images in a fixed field of view;

[0061] Step S2: Denoise the acquired n groups of images by frame averaging method to obtain n initial denoising images;

[0062] Step S3: applying adaptive Gamma correction to the n preliminary noise-reduced images in sequence;

[0063] Step S4: converting the sequence of images obtained by step S3 from the RGB color space to the YUV color space in turn;

[0064] Step S5: Perform two parallel processes on the YUV color space image obtained ...

Embodiment 2

[0133] The embodiment of the present invention also provides a low-illuminance color image enhancement device, which is characterized in that it includes a processor and a storage medium;

[0134] The storage medium is used to store instructions;

[0135] The processor is configured to operate according to the instructions to perform the steps of the following method:

[0136] S1: Continuously acquire n groups (each group contains the same number of frames) of low-illuminance color images in a fixed field of view;

[0137] S2: Denoise the acquired n groups of images by frame averaging method to obtain n initial denoising images;

[0138] S3: Apply adaptive Gamma correction to the n preliminary denoising images sequentially;

[0139] S4: converting the image sequence obtained by S3 from the RGB color space to the YUV color space in turn;

[0140] S5: Perform two parallel processes on the YUV color space image obtained by S4: one is to perform frame average processing on it; ...

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Abstract

The invention aims to overcome the defects in the prior art, provides the low-illumination color image enhancement method and device, which has a good inhibition effect on noise generated by imaging equipment, and effectively avoids noise pollution caused by a traditional enhancement algorithm and image information loss caused by a traditional denoising algorithm. According to the method, throughframe average method noise reduction and self-adaptive Gamma correction, an image sequence is sequentially converted from an RGB color space to a YUV color space, obtained YUV color space images are subjected to parallel processing, a non-global objective quality evaluation method is adopted to perform quality sorting on blind source separation noise reduction images, contrast-limited adaptive histogram equalization processing is performed on the optimal quality image, adaptive illumination equalization processing is performed on the fused image, and the illumination equalization processing image with U and V channel components of the frame average image are combined to obtain an enhanced image of the low-illumination color image.

Description

technical field [0001] The invention relates to a low-illuminance color image enhancement method, which belongs to the technical field of image enhancement. Background technique [0002] In today's society, 70-80% of the information that people obtain is obtained through the visual system, and the information contained in the image is more intuitive and rich. However, in low-light scenes, the information such as the color of the image is not intuitive and rich enough. Therefore, more and more Scholars began to study image restoration in low-light scenes. [0003] At present, it is mainly divided into two major research fields, one is the hardware field, and the other is the algorithm field. The field of hardware is mainly to obtain more and rich photosensitive information through the research and design of circuit devices, and at the same time overcome the noise of circuit devices; the field of algorithm is mainly to process the received information to restore scene informa...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T5/40G06T5/50G06T7/00
CPCG06T5/002G06T5/009G06T5/40G06T5/50G06T7/0002G06T2207/10024G06T2207/20221G06T2207/20004G06T2207/30168
Inventor 陈刚喻春雨刘言
Owner NANJING UNIV OF POSTS & TELECOMM
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