Light compensation method and device

Abstract

The embodiment of the invention provides an optical compensation method and device. The method comprises the following steps of acquiring the current brightness of a region where a target object in the current image is located, wherein the current image is an image collected in the image acquisition area; judging whether the current brightness is in a preset brightness range or not; adjusting theexpected brightness for determining the overall brightness of the current image when the current brightness is not within the brightness range, wherein the expected brightness is in direct proportionto the current brightness; and carrying out light compensation on the image acquisition area according to the adjusted expected brightness. Therefore, the expected brightness in the embodiment of theinvention is adjustable. Through the adjustable desired brightness, the brightness compensation range can be expanded, and the brightness compensation capability of the image acquisition device is improved. Further, the image with good brightness can be obtained through the adjustable desired brightness, so that the specific content of the target object in the image is more easily recognized.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to an optical compensation method and device. Background technique [0002] When an image acquisition device acquires an image, it generally requires the image acquisition area to have a certain brightness, so light compensation needs to be performed according to the brightness of the image acquisition area. The principle of light compensation performed by the image acquisition device is to perform light compensation control according to a preset expected brightness, wherein the expected brightness is the preset brightness expected to be achieved by the overall brightness of the captured image. When there is a front light or a backlight in the image acquisition area, the average brightness of the image acquisition area may be close to the preset desired brightness, but some areas in the image acquisition area may be overexposed or underexposed, and then , causing the bright...

AI Technical Summary

Problems solved by technology

When there is a front light or a backlight in the image acquisition area, the average brightness of the image acquisition area may be close to the preset desired brightness, but some areas in the image acquisition area may be overexposed or underexposed, and then , causing the brightness of the local area to be too large or too small, and the specific content of the target object in the local area cannot be well recognized

For example, in the field of intelligent transportation, image acquisition equipment collects images of vehicles running red lights. When the license plate of the vehicle is just in the above-mentioned local area, the license plate number in the license plate cannot be well recognized, seriously affecting the subsequent traffic management

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