Photograph control device and method for high brightness shot object

Abstract

Said invention refers to photograph controller and method for high brilliance object. When part area in shot object existing high brilliant light source, said invention can detects and control any area of light source, in order to prevent the reducing of aperture open and can normally display the main object in other areas of video image. Said invention can greatly raises monitoring function.

Description

【Technical field】 [0001] The present invention relates to a photographing control device and method for a high-brightness subject, and more specifically, relates to, for example, in a subject video image captured by a surveillance camera, even if a high-brightness light source ( Light Source), a photographing control device and method capable of normally displaying a high-brightness subject of a main target existing in other regions of an image. 【Background technique】 [0002] Generally, surveillance cameras using charge coupled devices (Charge Coupled Device, hereinafter referred to as CCD), such as figure 1 As shown, it includes a lens 10, an aperture 11, a CCD 12, a CDS&AGC 13, an analog / digital converter 14, a digital signal processing unit 15, a microcomputer 16, and the like. [0003] On the other hand, the incident light through the above-mentioned lens 10 is adjusted accordingly with the opening and closing degree of the above-mentioned aperture 11, for example, whe...

AI Technical Summary

Problems solved by technology

[0008] However, on ordinary surveillance cameras, for example, such as Figure 4 As shown, in the image of the subject captured by a surveillance camera, when there is a high-intensity light source in some areas, the overall brightness of the image will increase significantly, so the opening degree of the above-mentioned aperture should be sharply reduced; and In the same way, as the opening degree of the aperture 11 decreases sharply, the brightness of the digitally processed video image will all decrease, so there may be a problem that the main target (such as the license plate number) cannot be recognized.

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