Image processing method, image processing device, readable medium and electronic equipment

Abstract

The invention relates to the field of image processing, and discloses an image processing method, an image processing device, a readable medium and electronic equipment. The image processing method comprises the steps of: obtaining a to-be-corrected image shot by a camera of the electronic equipment; calculating a zoom distance between each pixel point on the to-be-corrected image and a brightnessreference point of the to-be-corrected image; determining the correction coefficient of each pixel point based on the relationship between the zoom distance of the camera and the correction coefficient, the pixel points having the same physical distance with the brightness reference points but different brightness have different zoom distances, and the pixel points having the different zoom distances with the brightness reference points have different correction coefficients; and correcting the brightness of each pixel point based on the correction coefficient of each pixel point to obtain acorrected image. Therefore, the pixel points with the same physical distance with the brightness reference point and different brightness in the to-be-corrected image have the same brightness after correction, and the shadow correction effect is improved.

Description

technical field [0001] The present application relates to the field of image processing, in particular to an image processing method, an image processing device, a readable medium and electronic equipment. Background technique [0002] When using a camera to take images, for example, when using a camera on a mobile phone to take photos, if the subject is far away, as the field of view increases, the oblique light beams that can pass through the camera lens will gradually decrease, so that the camera can capture The center of the image is brighter and the edges are darker. This phenomenon is called vignetting in an optical system. The vignetting phenomenon will lead to uneven brightness of the image captured by the camera, and the uneven brightness of the image will affect the accuracy of subsequent processing. Therefore, the digital signal output by the image sensor (ImageSensor, IS) must first be corrected by the lens of the image signal processor (Image Signal Processor, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the compensation and amplification of the digital circuit is mainly carried out through the pixel units in the entire imaging range, so as to achieve the purpose of shading correction, but this method needs to consume a large number of digital circuit storage units to store the correction coefficient of the gray-scale image, and the camera resolution rate of increasing trend, the method is costly

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