Non-metric camera cross-coupling error compensation and image matching correction method and system

Abstract

The invention provides a non-measurement camera cross-coupling error compensation and image matching correction method and system. In the case of camera zooming, the pixel focal length is obtained by fitting the focal length magnification and the pixel focal length Obtain the pixel center to construct the internal reference matrix of the camera under zoom. When the camera pose changes, the rotation angle of the camera pose is known, the rotation matrix under the new pose is obtained through the transformation matrix obtained from the camera rotation angle and the rotation matrix under the reference, and the translation vector under the new pose is obtained through the translation vector derivation formula. It enables the non-measurement camera to obtain the internal and external parameters of the camera in real time during the process of zooming and rotating, so that the points in the object-space world coordinate system can be matched and mapped to the camera image in real time. Moreover, the present invention improves the matching error between the object space and the image space caused by the cross-coupling phenomenon in the rotation process of the camera.

Description

technical field [0001] The invention relates to the field of camera photogrammetry, in particular to a non-measurement camera cross-coupling error compensation and image matching correction method and system. Background technique [0002] With the development of social economy and science and technology, in recent years, people have higher and higher requirements for safety technology prevention. From the end of the 1980s to the present, with the introduction of various new security concepts, digital video surveillance systems have been widely used in the field of security prevention in various industries and departments of society, and video surveillance technology has played an important role in the field of public security. . [0003] With the development of camera technology, the surveillance cameras used in video surveillance systems have changed from analog cameras to digital cameras, and high-definition digital cameras are basically used in current video surveillance...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a non-measuring camera cross-coupling error compensation and image matching correction method and system to improve the cross-coupling error in the rotation process caused by the defect of the non-measuring camera itself

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