| 摘要(英) |
As technology advances, one of the most demands is digitalized spatial information to overcome the problem by the old methods, which are expensive, imprecise and time consuming. In this study, we use a triangulation method to build two different systems, linear laser scan system and structural light scan system, to establish the point cloud. Because both scan systems use an active projection light source, they are suitable for environments that lack feature points, so that we can construct high-quality space point cloud under such environments.
For the linear laser scan system, we project linear laser light to the target space, and then obtain the depth information through the deformation of the laser line. Besides, a rotating platform is implemented to do scanning. Accordingly, we have successfully built an indoor scan system at low cost and high precision.
Secondly, we use a projector to project a specific structure pattern and use two cameras to capture images with the structure light. Then we apply image matching scheme to find the corresponding coordinates and get the space information. Since the system can produce a large number of point cloud in a single shot, only a few images are enough to complete the scan. Finally, we optimize the image processing to speed up the process in constructing the spatial point cloud. |
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