基于激光扫描的人脸三维重建方法

针对人脸三维重建,基于RGB 激光扫描系统,提出了一种彩色三维重建方法。首先,以直接标定的方法,建立了数码相机采样图片的像素坐标系与世界坐标系的映射关系;利用相机拍摄的三色激光照明下的标准色板图像,标定了数码相机对三原色的感光曲线,即建立了相机三原色记录值与标准值之间的关系。然后,以人脸为目标,提出了从获取扫描数据到进行三维重建的完整方法。最后,经迭代法匹配,输出为通用的三维模型格式,实现了人脸在毫米量级上的三维重建。该方法简化了标定过程,算法简单,系统造价低,可推广至各种物件的三维扫描重建。

Face 3D reconstruction based on laser scanning system

For face 3D reconstruction, a color 3D reconstruction method was put forward based on RGB laser scanning system. First, the mapping relationship between the pix-coordinates and the world- coordinates was determined by using a calibration plate; and a standard color plate was used for calibrating the RGB color data, in which the value acquired by digital camera and the value provided by the standard color plate had fitted. Second, the face 3D reconstruction experiment was introduced in detail including the steps of scanning, calibration and image processing. And the face could be 3D reconstructed with color texture at millimeter scales. Then, the 3D data were matched by ICP method, and could be exported to other software as a 3D model. This method simplifies the algorithm of the calibration and 3D reconstruction, and the system is low cost which can be widely used for 3D reconstruction of many kinds of objects.