Image acquisition system with red light color correction function

Abstract

The invention discloses an image acquisition system with a red light color correction function. The image acquisition system comprises an image sensor, an analog gain module, an analog-to-digital conversion module, a color correction module and a digital gain module, wherein the image sensor is used for taking an image including traffic lights; the analog gain module is used for performing analogamplification on the taken image with a predetermined gain coefficient; the analog-to-digital conversion device is used for performing analog-to-digital conversion on the amplified analog image data in order to convert the analog image data into digital image data; the color correction module is used for performing color correction on the traffic lights in the digital image; and the digital gain module is used for digitally amplifying the digital image. Through adoption of the image acquisition system, the color component proportions of overexposed pixels are kept constant when the digital gain of the image is increased, so that the problems of yellowing and whitening of a red light since the red light is too bright are solved while the overall brightness of the image is not influenced.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image acquisition system with a red light color correction function. Background technique [0002] Electronic police is a modern traffic law enforcement system that uses high-definition cameras to automatically record traffic violations such as running red lights, driving in the wrong direction, and speeding. The recorded picture puts forward requirements: "The clarity of the picture should be able to meet the requirements of manual identification of the vehicle license plate number, and the red light signal should not be affected by color distortion such as whitening and halo of the red light signal to affect the manual judgment of the red light signal." [0003] Traffic signal lights can be generally divided into incandescent lamps, halogen lamps and light-emitting diodes according to different light sources. LED traffic signal lights have been widely used in recent years due...

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Problems solved by technology

[0005] Aiming at the problems of existing signal light correction methods, the applicant conducted in-depth research

The applicant found that the method for color correction of traffic lights in the prior art cannot solve the cause of the discoloration of the signal lights. In fact, none of the solutions in the prior art can find the root cause of the discoloration of the red signal lights

The processing methods in the prior art are all based on the processing of the entire image, but the present invention proposes a new image acquisition system, which corrects based on the dynamic range of pixels in the image, and solves the problem of yellowing of red signal lights from a microscopic perspective

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