Method and system for measuring parameters of pantilt and lens camera system based on resection measurement

Abstract

The invention provides a method and system for measuring the parameters of a pantilt and lens camera system based on resection measurement. The method comprises the following steps: S1, acquiring thecoordinates of multiple sets of intersection points and the coordinates of a front projection corresponding point of a same photo at a fixed focal length, and correcting errors to obtain the coordinates of the intersection points; S2, acquiring a two-dimensional point set of the coordinates of the multiple sets of intersection points and the coordinates of the front projection corresponding pointunder a same pitch angle, and performing second resection and least square bundle adjustment to obtain the axial image distance, the rotating arm length and the general equation of the pantilt and lens camera system; and S3, establishing a focal length-axial image distance-pitch angle curved surface function by using a fitting function between the axial image distance and the focal length of the orthogonal point and the pitch angle, obtained at different focal lengths. The focal length-axial image distance-pitch angle function is accurately obtained through the characteristics and the solvingtechnology of the axial image distance parameter of the pantilt and lens camera system, so the obtaining problem of the axial image distance of the pantilt and lens camera system in a technology for measuring three-dimensional point cloud by using video stream is solved.

Description

technical field [0001] The present invention relates to the technical field of digital photogrammetry, and more specifically, to a method and system for measuring parameters of a cloud-mirror camera system based on resection measurement. Background technique [0002] A large amount of plant phenotype information needs to be obtained in agricultural production. In order to obtain plant phenotype information through images and realize automatic monitoring of agricultural production, it is necessary to measure 3D point clouds of plants in the field. [0003] The high-throughput 3D point cloud measurement of plants in the field is greatly affected by the environment. The high-throughput plant phenotyping equipment currently on the market is expensive and can only be used for high-end scientific research. There is a lack of cheap high-throughput plant phenotypes that can be applied to agricultural production. equipment. [0004] At present, it is a new research direction to use...

AI Technical Summary

Problems solved by technology

[0003] The high-throughput 3D point cloud measurement of plants in the field is greatly affected by the environment. The high-throughput plant phenotyping equipment currently on the market is expensive and can only be used for high-end scientific research. There is a lack of cheap high-throughput plant phenotypes that can be applied to agricultural production. equipment

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