Acquisition method of large scene based on line laser

An acquisition method, line laser technology, applied in the field of three-dimensional scanning, can solve the problems of prolonging the calibration time and errors

Inactive Publication Date: 2009-10-07
ZHEJIANG UNIV
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Problems solved by technology

This not only prolongs the calibration time, but also brings errors

Method used

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  • Acquisition method of large scene based on line laser
  • Acquisition method of large scene based on line laser
  • Acquisition method of large scene based on line laser

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Embodiment Construction

[0043] The present invention is a large-scale scene acquisition method based on line laser, such as figure 1 As shown, it includes the following steps: 1. Set up several cameras around the scene; 2. Use the multi-camera calibration algorithm proposed by Tomas Svoboda to perform multi-camera calibration, and calculate the internal and external parameters of multiple cameras in the scene; 3. Use the camera from the scene The laser line A of the outer emission point A scans the entire scene, and all cameras take pictures of the laser line A at different times during the scanning process, and obtain several photos respectively; 4. Change the laser line emission point and use the laser line from the outer emission point B of the scene B scans the entire scene, and all cameras take pictures of the laser line B at different times during the scanning process, and obtain several photos; for the same camera, take each photo obtained in step 3 and the photo corresponding to it in step 4 as ...

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Abstract

The invention discloses an acquisition method of large scene based on line laser, including following steps: 1) erecting a plurality of cameras around the scene and regulating focal distance; 2) applying multi-camera calibration algorithm to calibrate and calculate internal and external parameter of a plurality of cameras; 3) using line laser A and B of emitting point A and B from outside the scene to scan the whole scene, all the cameras screening the line laser A and B of different time respetively in the scanning process to obtain a plurailty groups of pictures having information of both the line laser A and B of different time; 5) extracting line laser from the screened pictures; 6) proceeding three-dimensional point cloud calculation to the extracted line laser to generate three-dimensional information of the whole scene. Method of the invention avoids the turntable calibration step by improving the conventional calculation, which both improving scan accuracy and recuding scene acquisition time, and improving scan efficiency. The method is suitable to scan complex scenes incable of fixing laser emitter.

Description

technical field [0001] The invention relates to a three-dimensional scanning technology, in particular to a large-scale scene scanning method based on line lasers without laser transmitter calibration. Background technique [0002] Three-dimensional scanning technology is a reverse engineering CAD technology that generally uses the output data of digital measuring equipment as the original source of information. Subsequent work, such as model detection, modeling, evaluation, improvement and manufacturing of complex surfaces, can be realized only after obtaining the surface three-dimensional information of the entity to be reversed. The quality of the reverse engineering measurement method directly affects the accuracy and completeness of the description of the measured entity, affects the speed of the geometric information of the digitized entity, and then affects the quality of the reconstructed CAD surface and entity model, and finally affects the entire The progress and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/40G06T7/00G01B11/00G06T19/00
Inventor 鲁东明刁常宇古鑫桐
Owner ZHEJIANG UNIV
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