Processing method and device for improving colorful image quality under condition of low-light level

Abstract

The present invention discloses a processing method and device for improving a colorful image quality under a condition of a low-light level. The method includes: periodically switching an infrared filtering sheet and a full transparent spectrum filtering sheet deployed before an image sensor, and collecting a corresponding infrared filtering image and full transparent image in time; obtaining image color information of the infrared filtering, and obtaining image luminance information of the full transparent image; and performing data fusion process on the image luminance information and the image color information, to output a colorful image. By periodically switching the infrared filtering sheet and the full transparent spectrum filtering sheet deployed before the image sensor, respectively obtaining the luminance information and the color information of the image under the condition of the low-light level via the successively collected image, and combining characteristics of the two images under the condition of the low-light level for synthesis of a new colorful image, the method can reduce noises of the image under the condition of the low-light level, while increasing the luminance of the image, thereby obtaining a colorful image with a better quality in a low-light level environment.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a processing method and device for improving the quality of color images under low illumination. Background technique [0002] A digital camera generally includes: an optical lens, an image sensor, an image processing chip, an image transmission module, and an image display module. Among them, the optical lens controls the light entering the digital camera, and the image sensor converts the optical signal into an electrical signal. Then the image processing chip is used for processing, and finally the finally obtained signal is transmitted to the image display module through the image transmission module for display. [0003] With the wide application of surveillance camera equipment, people have higher and higher requirements for image quality obtained under low-light conditions. However, in the natural environment, there are various wavelengths of light, and t...

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Problems solved by technology

[0005] In order to solve the problem of low brightness and high noise in the color image output by the camera under low-illuminance conditions in the prior art, or the problem that only black and white images can be obtained through a fully transparent spectral filter, the purpose of the embodiments of the present invention is to provide a Processing method and device for improving color image quality under low illumination

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