Cmos sensor exposure and signal lamp synchronization method and device

Abstract

The invention provides a Cmos sensor exposure and signal lamp synchronization method and device, and relates to the traffic video monitoring technical field; the Cmos sensor exposure and signal lamp synchronization method comprises the following steps: dynamically adjusting a line number Vmax of each frame of the cmos sensor so as to synchronize a cmos sensor exposure end time with a signal lamp falling edge interrupt incoming time; obtaining a time difference between a signal falling edge of each frame of the cmos and a signal lamp pulse falling edge in real time, continuously adjusting the Vmax according to the obtained time difference, and realizing a relative stable state. The method can ensure the exposure and signal lamp synchronization when the cmos sensor selects a main mode, and the cmos sensor does not need to be modified as a passive mode, thus improving the traffic camera shooting quality, and providing more persuasive image evidences for traffic enforcement.

Description

technical field [0001] The invention relates to the technical field of traffic video monitoring, in particular to a method and a device for synchronizing the exposure of a CMOS sensor and a signal light. Background technique [0002] Video surveillance is often used at traffic intersections to capture the problem of vehicles running red lights, but most traffic lights are controlled by a square wave with a 50% duty cycle. In the captured picture of a vehicle running a red light, the red light may not be on. This will undoubtedly cause the only evidence of the illegal act to become unconvincing, which will bring difficulties to traffic law enforcement. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems in the above-mentioned prior art or related art, and provides a method and device for synchronizing cmos sensor exposure and signal light, improving the capture quality of traffic cameras, and providing traffic law e...

AI Technical Summary

Problems solved by technology

[0002] Video surveillance is often used at traffic intersections to capture the problem of vehicles running red lights, but most traffic lights are controlled by a square wave with a 50% duty cycle. In the captured picture of a vehicle running a red light, the red light may not be on

This will undoubtedly cause the only evidence of the illegal act to become unconvincing, which will bring difficulties to traffic law enforcement.

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