System and method for calibrating linear array camera based on laser scanner

Abstract

The invention provides a system for calibrating a linear array camera based on a laser scanner, comprising a bearing device, a laser scanner and a resolver, wherein the laser scanner is arranged on the bearing device, and the bearing device is provided with a support which is used for fixing the linear array camera; the laser scanner is arranged below the linear array camera, the scanning direction of the laser scanner is parallel to the lens direction of the linear array camera, and nodes of the laser scanner and nodes of the linear array camera are in the same vertical straight line; the laser scanner scans to acquire point cloud data of a measured target object; the linear array camera takes pictures for positions scanned by the laser scanner so as to acquire image data of the measured target object; and the resolver receives the point cloud data and the image data, carries out characteristic matching on the received data and operates inner orientation elements of the linear array camera in accordance with the received data. The invention also provides a method for calibrating the linear array camera based on the laser scanner. The system and method provided by the invention can be used to reduce the workload of calibrating the linear array camera.

Description

technical field [0001] The invention relates to a method for calibrating a line array camera, in particular to a system and method for calibrating a line array camera based on a laser scanner. Background technique [0002] With the increasing popularity of 3D spatial information services, people have higher and higher requirements for the fidelity of virtual reality, and 3D measurement technology has attracted more and more attention. At present, the three-dimensional measurement technology mainly obtains the image of the measured object through the line array camera, and further reconstructs the absolute three-dimensional coordinates of the measured object by calculating the internal orientation elements of the camera. The process of calculating the internal orientation elements of the camera is called Camera calibration, because the relative position between the line array camera and the target object is constantly changing during dynamic shooting, the traditional camera c...

AI Technical Summary

Problems solved by technology

At present, the three-dimensional measurement technology mainly obtains the image of the measured object through the line array camera, and further reconstructs the absolute three-dimensional coordinates of the measured object by calculating the internal orientation elements of the camera. The process of calculating the internal orientation elements of the camera is called Camera calibration, because the relative position between the line array camera and the target object is constantly changing during dynamic shooting, the traditional camera calibration technology needs to design the target, analyze the distribution of the feature lines on the target in the image, and determine the relative position of the slogan camera. Positional relationship, and then calibrate the internal orientation elements of the camera. This method not only requires a large amount of calculation, but also the calibration accuracy is difficult to guarantee.

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