Imaging control method and apparatus

Abstract

The invention discloses an imaging control method and a device thereof. The method comprises the following steps: when the background brightness of a video image exceeds thresholds of an upper and a lower bounds of the background brightness, an imaging control parameter is adjusted; a candid video image is taken after a vehicle actuates a traffic signal, and when the license plate brightness of the candid video image exceeds the thresholds of the upper and the lower bounds of the license plate brightness, the imaging control parameter is adjusted; when the license plate brightness is larger than the threshold of the upper bound of the license plate brightness and the real-time background brightness is close to the threshold of the lower bound of the background brightness, the thresholds of the upper and the lower bounds of the background brightness are lowered; and when the license plate brightness is smaller than the threshold of the lower bound of the license plate brightness and the real-time background brightness is close to the threshold of the upper bound of the background brightness, the thresholds of the upper and the lower bounds of the background brightness are increased. The method and the device can adapt to the changes of ambient lights, so that the image of the license plate area in the video image is clear.

Description

technical field [0001] The invention relates to the field of traffic control systems, in particular to an imaging control method and device for a vehicle monitoring and recording system. Background technique [0002] The vehicle monitoring and recording system plays an important role in traffic monitoring, traffic management, and social security. It plays an important role in combating speeding and illegal acts, and deterring criminals. Vehicles are deployed and controlled, which greatly improves the safe driving environment, and at the same time serves the social security management. [0003] Generally, the vehicle monitoring and recording system on the market uses a camera installed on the driveway to capture video images in real time. When a vehicle passes through the detection area of ​​the video image, the camera is triggered to capture the image, and the video image including the vehicle is obtained. Then the system will include The vehicle license plate is automatica...

AI Technical Summary

Problems solved by technology

[0005] The imaging is controlled according to the brightness of the license plate. When there is no vehicle passing by for a long time and the ambient light changes greatly, the imaging will be out of control.

For example, in cloudy weather, when the sun is blocked by clouds, the imaging control is normal. When the sun comes out, the imaging will become brighter, but since no vehicles have passed by, the imaging will not be controlled. When a vehicle arrives, it may The license plate image is too bright to locate the license plate area, so it is impossible to control the imaging according to the license plate brightness, and the imaging control is out of control at this time

Images