A Method for Estimating the Installation Angle of a Road Surveillance Camera

Abstract

The invention discloses a method for estimating an installation angle of a road monitoring camera, and belongs to the field of road monitoring. The method comprises the steps of: performing detectionof a horizontal vanishing point on an image acquired by a camera based on parallel lines; and obtaining an installation angle of a road monitoring camera by utilizing a relationship between the horizontal vanishing point in the image and the installation angle of the camera. Through adoption of the method of the invention, priori knowledge of external conditions of a road monitoring scene is combined with a projection transformation principle in an imaging principle, the relationship between the vanishing point and the installation angle of the camera is utilized, and the characteristic that there are only two angles of degrees of freedom in an installation process of a security camera is supplemented, the two concerned installation angles are calculated through a mathematical formula, inthis way, after the monitoring camera is installed, the installation angle of the camera can be automatically calculated on the basis of not increasing any operation process; the method can automatically identify the installation angle at fixed interval time, so as to adapt to the influence of natural environmental factors on the installation angle of the camera, thereby achieving the purpose of automatic labeling.

Description

technical field [0001] The invention belongs to the field of road monitoring, and more particularly relates to a method for estimating the installation angle of a road monitoring camera. Background technique [0002] In recent years, with the rapid development of the economy, the number of motor vehicles in my country's urban and rural areas has increased rapidly, and criminal and public security cases related to vehicles have also increased year by year. Under such circumstances, effective use of advanced scientific and technological means to improve urban and rural road traffic management, crack down on and prevent vehicle-related cases, deter criminals, and improve social security management has become an important task for public security traffic management departments at all levels. Many functions of the road surveillance camera need to calibrate the external parameters of the camera, such as the height of the camera installation, the pitch angle of the camera installat...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of high cost and inability to self-adaption in the prior art method of measuring angles, the present invention provides a method for estimating the installation angle of a road surveillance camera, the purpose of which is to automatically calibrate the installation angle of the camera without human intervention. The camera's distance measurement, speed measurement, etc. provide automatically extracted parameters, and automatically calibrate the installation angle of the camera in real time at the lowest cost

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