基于投影器-数码相机的物体三维重建

针对三维重建在计算机视觉和近景摄影测量目标物体纹理缺乏的特点,在传统用数码相机摄取影像数据的基础上,引入了投影器设备,构成投影器-数码相机系统。该系统可使投影器能够人为地给物体表面添加纹理特征,这些纹理特征清晰稳定、相对容易提取和匹配;利用投影器虚拟影像和数码相机拍摄的带有投影纹理特征的物体影像构成立体像对,可通过空间前方交会的方法解算纹理特征的空间坐标;连接相邻的空间纹理特征点,可形成物体三维立体模型。实验及其结果证明了基于投影器-数码相机系统的物体三维重建的有效性和实用性。

3D Reconstruction of Objects Based on Camera-Projector System

The 3D reconstruction is a research hotspot in the fields of computer vision and close-range photogrammetry. Especially, the 3D reconstruction of objects which are lack of real texture is a great difficulty and challenge. In this study, the slide projector is steered on the foundation of taking images by digital camera traditionally, according to the characteristic lack of real texture. So the camera-projector system is formed. The slide projector can supply the target objects with texture characteristics which are clear and stable so that they are easy to be extracted out and matched well relatively. The space coordinates of the texture characteristics are computed out by the space forward intersection, taking full use of the stereo images composed with the slide of the projector and the images with the texture characteristics taken by the digital camera. The final 3D model is formed by connecting the neighbor space points. The 3D reconstruction based on the camera-projector system in the study is proved and confirmed to be effective and practical by the experimental data and results