Cultural relic rotation structured light three-dimensional digital modeling method

Abstract

The invention provides a cultural relic rotation structured light three-dimensional digital modeling method. The method comprises the following steps: generating stable line structured light on the surface of the cultural relic by using a line laser scanner the laser beam energy of which does not exceed 2W, and computing three dimensional coordinates of the cross section of the scan line structured light; synchronously shooting the image of the cultural relic by using a binocular CCD stereovision system to obtain a rotating matrix composed of stereo pairs and exterior azimuth and attitude elements; computing the linear characteristic equation to generate linear characteristic point sets; and establishing the relation between the two linear characteristic point sets of the stereo pairs, computing the three dimensional coordinates of the linear cross section of the cultural relic, and computing the three dimensional coordinates of the cross section of the scan line structured light at each rotating angle as well as the three dimensional coordinates of the cross section of the line structured light of the cultural relic, thereby establishing the three-dimensional digital model of the cultural relic. In the invention, the three-dimensional digital model of the cultural relic is established at low cost by using the line laser scanner in cooperation with the rotating plate. The invention provides a new high-efficiency low-cost technical scheme for constructing a digital cultural relic museum.

Description

technical field [0001] The invention relates to the technical fields of digitization of cultural relics, computer vision and precision measurement, in particular to a method for precise measurement and three-dimensional digital modeling of structured light generated by body rotation. Background technique [0002] With the passage of time and the impact of human activities, ancient cultural relics are constantly being destroyed. How to digitally process cultural relics with new technologies and new methods to make human treasures last forever has become an urgent global issue. In recent years, the development of digital information recording technology for three-dimensional cultural relics has received more and more attention, and people's research on various recording technologies is in the ascendant. Judging from the current development status at home and abroad, the recording methods of 3D objects can be roughly divided into four categories, namely methods based on direct ...

AI Technical Summary

Problems solved by technology

The method based on direct measurement has a large workload; X-ray CT scanning is expensive and bulky, and cannot scan cultural relics on site. In addition, due to layered scanning, it takes a long time to scan a cultural relic; computer vision scans cultural relics There are difficulties in automatic processing of 3D reconstruction. Due to the complex surface of cultural relics, there is an occlusion problem in obtaining the scanned data of cultural relics from a single angle; 3D laser scanning also has damage to cultural relics and complex data processing. How to quickly obtain a comprehensive 3D image of the cultural relics surface Data is a major problem in realizing digital cultural relics management and applying it to the practice of cultural relics and archaeology

[0003] Traditional means of drawing, photography, photography, and text recording are limited to certain factors, and can only obtain two-dimensional images of three-dimensional objects, and cannot accurately and detailedly record the geometric information and three-dimensional shape of cultural relics. The method based on binocular computer vision can directly Measurement on the image, but it has the problem of matching and automatic extraction of the same name points; the method of 3D laser scanning can directly obtain the 3D coordinates of the shape, but the laser damages the surface of the cultural relics and the data processing is complicated

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