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Image processing method and electronic equipment

A technology of image processing and electronic equipment, applied in the field of image processing, can solve problems such as the inability to improve low-light image quality, achieve the effect of solving color distortion and motion blur, and image distortion

Active Publication Date: 2020-03-06
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] This application provides an image processing method and electronic equipment to solve the problem in the prior art that the quality of low-light images cannot be improved through hardware

Method used

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  • Image processing method and electronic equipment
  • Image processing method and electronic equipment
  • Image processing method and electronic equipment

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Embodiment Construction

[0054] The applicant found in the process of implementing the present application that the attenuation of each color component by underexposure is nonlinear, and in this case, it is difficult to obtain a better color enhancement effect through direct gain or model transformation. Therefore, the fully exposed image can be used as a reference to perform color enhancement on the underexposed image, thereby improving the color reproduction of the underexposed image.

[0055] It should be noted that the exposure time refers to the shutter speed. Simply put, it is the time to press the shutter. The longer the time, the more photons will reach the surface of the image sensor, and the brighter the captured image will be; if the exposure is overexposed, then If the image is too bright, image details will be lost; if the image is underexposed, the photo will be too dark, and image details will also be lost. Although the image quality will be better if the exposure time is relatively lon...

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Abstract

The invention provides an image processing method and electronic equipment, which are used for solving the problem that the quality of a low-illumination image cannot be improved through hardware in the prior art. The method comprises the following steps: acquiring two color images of the same target scene, wherein the exposure durations of the two color images are different; taking a color component statistical histogram of the color image obtained by relatively long exposure duration as reference information; adjusting the statistical histogram of each color component of the color image withshort exposure duration, so as to enable the adjusted short-exposure color image and the fully-exposed color image to have similar hue and brightness. The original texture can be maintained, and theeffect of low-illumination image enhancement is achieved.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to an image processing method and electronic equipment. Background technique [0002] In security monitoring scenarios, image quality under low-light conditions is an important condition for subjective identification and intelligent identification, and it is also an important indicator for customers to measure products. The color reproduction of images in low-light scenes can be improved by extending the exposure time or the frame accumulation algorithm, but extending the exposure time will cause problems such as blurring and smearing of moving object images when shooting moving object scenes. Shorter exposure times suppress motion blur and result in sharper texture edges, but underexposure results in desaturated colors and dimmed brightness. [0003] The contradiction between exposure time and image quality is currently difficult to solve by hardware, so the met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N5/225H04N9/64H04N9/73
CPCH04N9/64H04N9/73H04N23/54H04N23/57H04N23/70H04N23/73
Inventor 提纯利
Owner HUAWEI TECH CO LTD
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