Image brightness exposure compensation device and compensation method thereof

Abstract

The invention discloses an image brightness exposure compensation device and a compensation method thereof. The image brightness exposure compensation device comprises a camera used for monitoring a shooting scene in real time, a liquid crystal screen used for exposure compensation and a driving board used for controlling the liquid crystal screen. Wherein the camera comprises a lens and a CCD (Charge Coupled Device) chip, the liquid crystal screen is arranged between the lens and the CCD chip in parallel at an interval to form a hamburger structure, and the liquid crystal screen is in communication connection with the driving board; the system further comprises an upper computer used for compensation calculation, the upper computer is in communication connection with the camera and the drive board through a USB interface, firstly, the liquid crystal screen is set to be full-light-transmitting, and the camera monitors a scene needing to be shot in real time and collects illumination information in the scene. Secondly, the liquid crystal screen obtains exposure compensation after background processing, at the moment, the camera is arranged on the rear side of the liquid crystal compensation plate, and therefore a clear scene with the high contrast influence eliminated is obtained. Through the processing scheme disclosed by the invention, the light incoming amount at a strong light position is reduced, the brightness of the obtained image is proper, and exposure compensation is realized.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to an image brightness exposure compensation device and a compensation method thereof. Background technique [0002] In many practical scenes, for dynamic high-contrast scenes with strong brightness contrast and constantly changing light sources, it is difficult for ordinary exposure control to take into account the details of highlights and shadows. The exposure active compensation system can be used in military reconnaissance, optical control, urban surveillance, civilian cameras, etc. to eliminate the interference caused by strong light. For example, the missile guidance system is easily unable to distinguish the target normally due to high light such as firelight, resulting in misjudgment of the strike position; the traffic or security monitoring system cannot obtain clear portrait features in the backlight scene, which hinders the tracking of the suspect. At present, f...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an image brightness exposure compensation device and its compensation method, which are used to solve the problem of dynamic high-contrast scenes with strong brightness contrast and constantly changing light sources. It is difficult to take into account the details of highlights and dark parts in ordinary exposure control.

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