A fast 3D construction of heritage based on rotating structured light

Abstract

One three-dimensional (3D) heritage reconstruction method based on structured light extraction and interpolation is proposed. Firstly, an image smoothing algorithm is presented to remove noise. And then a threshold method is designed to extract the laser line with a certain width. The center coordinates of the intersection line of gray-scale laser plane and the surface of artifacts can be obtained. Secondly, a calibration ruler is used to establish a mapping relation between the laser plane and the image plane. With the index table of mapping relationship, the corresponding relationship between laser plane and the 3D space can be represented by the rotating matrix. Finally, the mapping relation between images coordinates and 3D spatial coordinates can be used to obtain the 3D model of heritage relics. Experiment results show that the presented method is fast and accurate which can meet the requirement of heritage 3D construction.