Research On Color 3D Imaging Technique Of Multi-view Line Structured Light

With the continuous application of machine vision in various fields,3D imaging technology has become one of the most popular research directions.In the three-dimensional imaging technology,the three-dimensional topography images collected by the traditional three-dimensional scanning system of structured light can only extract the depth information of the object,but cannot recover the color information of the object.With the progress of optical three-dimensional imaging and the increasing application demand,the development of structured light three-dimensional imaging technology shows the development of color,scale and complete,which puts forward increasingly high requirements for the quality of optical three-dimensional imaging.The traditional three-dimensional imaging technology can only obtain the depth information of the object,but the color information of the image is lost,so that the information of the object can not be restored completely after reconstruction.Aiming at the problem that the existing 3D imaging system of linear structured light can only obtain the depth information of the object,while the color information of the object is missing,the imaging principle of color 3D reconstruction is analyzed,the relationship between the principle of three primary colors and point cloud fusion is quantitatively analyzed,and a method of using point cloud information fusion and matching is proposed.A color three-dimensional imaging method that fuses point cloud images containing different color information together.Based on a binocular camera and a linear structured light laser projector,a scanning system is constructed which can obtain both the depth information and the color information of the object.Compared with the traditional linear structured light three-dimensional imaging system,which can only obtain the depth information of the object,the experimental system only scanned the object by laser lines of different colors without adding color texture cameras or other color acquisition equipment,and then matched the scanned three-dimensional topography images containing point cloud information of different colors through feature points first to achieve rough registration of point cloud data.On this basis,ICP is used to achieve the fine registration of large-scale point cloud data,so that three images containing different color components are fused together to obtain a complete color 3D reconstruction image,which makes the 3D reconstruction results more real.In addition to obtaining the complete depth information and color information of scanned objects,the 3D imaging technology of linear structured light was optimized.The self-developed binocular fusion and reconstruction technology of linear structured light was combined with the multi-view system to improve the problem of missing acquisition results caused by self-occlusion of objects and improve the integrity of information acquisition.On this basis,we continue to optimize the number of cameras,and add a group of binocular cameras to form a four-view acquisition system,which makes the reconstruction results more complete,expands the application range of three-dimensional scanning,and has important application value in promoting the linear structured light scanning to the true color and high restoration degree three-dimensional reconstruction direction.The research of multi-view line structured light color 3D imaging technology in this work has obtained a good result in the laboratory,which proves that the theoretical basis is correct and has a certain guiding role in obtaining the complete 3D information of scanned objects.