A calibration method of line scan camera based on spatial analytic geometry

Abstract

The invention provides a space analytic geometry-based line-scan camera calibration method and belongs to the line-scan CCD camera calibration field. The space analytic geometry-based line-scan camera calibration method is especially suitable for fast, accurate and flexible calibration of line-scan cameras. According to the calibration method, a new target is designed, and space analysis geometrical relationships are utilized, and the parameters of a line-scan camera can be obtained based on a vector method, and therefore, rapid calibration of the camera can be realized. With the method adopted, calibration accuracy can be ensured without making a precise target required, and the target is not required to move precisely according to a prescribed direction; and the plane of the target and the plane of the camera are not required to be parallel to each other, and therefore, the arrangement position and attitude of the camera can be arbitrary, and the flexibility of the calibration of the line-scan camera can be effectively improved. The space analytic geometry-based line-scan camera calibration method of the invention has the advantages of fast calibration speed, high accuracy, flexible operation and the like. With the space analytic geometry-based line-scan camera calibration method adopted, a precise target is not required to be produced, and fast calibration of the line-scan camera under harsh environment conditions can be realized.

Description

technical field [0001] The invention belongs to the field of calibration of linear array CCD cameras, in particular to fast, accurate and flexible calibration of linear array CCD cameras under severe environmental conditions. Background technique [0002] The calibration of camera parameters is a very critical link. The accuracy of the calibration results and the stability of the calibration algorithm directly affect the accuracy of the final results of the related system. Therefore, camera calibration is one of the most basic and important techniques in photogrammetry and computer vision techniques. [0003] The line scan camera has the characteristics of wide field of view, high sampling frequency, and high resolution. It has incomparable advantages in processing one-dimensional image signals and is widely used in high-precision measurement. To perform tasks such as visual measurement with a line-scan camera, it is first necessary to calibrate the internal and external pa...

AI Technical Summary

Problems solved by technology

[0007] In order to improve the accuracy and flexibility of linear array camera calibration, the present invention provides a linear array camera calibration method based on spatial analytic geometry, which solves the problems of complex target production and many special requirements in the calibration process in the existing calibration methods. Calibration accuracy is not high

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