Calibration method of coded structured light three-dimensional vision system

Abstract

A calibration method of a coded structured light three-dimensional vision system comprises the following steps of: 1) camera calibration processes: i.e. a two-dimensional calibration template is adopted, a calibration target consists of standard black and white chess checks, feature points are formed by chess checks points, a camera shoots a plurality of images in different positions, check angular points are selected as the feature points for the plurality of images, and a plane calibration method is adopted for calibrating the camera so as to obtain internal parameter calibration K of the camera as well as a mean value focal distance f; and 2) projector calibration processes: i.e. a light template generated from coding is used for projection onto a coplane calibration target, black and white check angular points are used as positioning points, and image coordinates of the black and white check angular points are simultaneously extracted to generate a world coordinate by utilizing theimages obtained from the camera calibration. The calibration method achieves high camera calibration accuracy and can satisfy the requirements of actual application.

Description

technical field [0001] The invention relates to computer vision, data processing, and image processing, in particular to a calibration method for a structured light three-dimensional vision system. Background technique [0002] The structured light 3D system restores the 3D shape from the 2D images acquired by the camera. The structured light system has the excellent characteristics of high precision, and the calibration of the camera and projector plays a very important role. The relationship between the position of the camera, the projector and the object, and the relationship between the projector and the camera are determined by the imaging geometric model of the camera and the projector. The parameters of the two geometric models are called system parameters. These parameters must be determined by the experiment The process of experiment and calculation is called structured light system calibration. The calibration of the system is to obtain the relationship between ea...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing calibration method of coded structured light 3D vision system, the projector calibration accuracy is low and cannot meet the needs of practical applications, the present invention provides a coded structured light vision imaging with high camera calibration precision and can meet the needs of practical applications System Calibration Method

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