A method and device for determining the viewing angle of a dome camera

Abstract

The invention relates to the technical field of image processing, and discloses a method and device for determining the field of view angle of a dome camera, which are used to automatically determine the field of view angle of a dome camera, which not only reduces labor costs, but also has a simple and efficient implementation process, and is suitable for large area promotion. The method includes: obtaining a first image taken by the dome camera and a second image taken after rotating a preset angle, wherein, when the dome camera takes the first image and the second image, the T coordinate or the P coordinate of the dome camera does not change change; obtain the value range of the field of view of the speed dome, and count the matching errors between the overlapping pixels of the first image and the second image under different field of view within the value range, and according to the corresponding value of the matching error with the smallest value Field of view, to obtain the target field of view of the speed dome.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for determining the viewing angle of a dome camera. Background technique [0002] The dome camera can also be called a dome camera, which integrates multiple functions such as an integrated camera, pan / tilt, decoder, and protective cover, and can be applied to the monitoring of open areas. The dome camera is a camera with variable magnification. Each magnification has a field of view, and the size of the field of view and the movement of the movement is not a simple linear relationship. In order to meet the requirements of fine control, it is necessary to complete the field of view calibration at each magnification. [0003] In the prior art, the field of view of the dome camera is mainly calibrated manually, for example, first assuming a field of view, and then looking at the positive and negative characteristics of the 3D positioning error,...

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Problems solved by technology

[0003] In the prior art, the field of view of the dome camera is mainly calibrated manually, for example, first assuming a field of view, and then looking at the positive and negative characteristics of the 3D positioning error, and increasing or decreasing the field of view accordingly, Until the accuracy meets the requirements, it can be seen that in the prior art, the process of determining the field of view angle of the dome camera requires high labor costs, the process is complicated and cumbersome, and is not suitable for large-scale promotion

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