基于移动最小二乘法的DLP光机微投畸变校正方法  

DLP Projector Micro-Projection Distortion Correction Method Based on Moving Least Square Method

作　　者：李贤 张晓峰[1] 王蔚生 许仁杰 黄漫辉 Li Xian;Zhang Xiaofeng;Wang Weisheng;Xu Renjie;Huang Manhui(Mechanical College,Shanghai Dianji University,Shanghai 201306,China;Shanghai Visiray Photoeletric Technology Co.,Ltd.,Shanghai 201306,China)

机构地区：[1]上海电机学院机械学院,上海201306 [2]上海唯视锐光电技术有限公司,上海201306

出　　处：《激光与光电子学进展》2024年第21期351-359,共9页Laser & Optoelectronics Progress

摘　　要：针对数字光处理(DLP)光固化3D打印机图像失真、畸变的问题,提出一种基于移动最小二乘法(MLS)的光机微投畸变校正方法。该方法根据板式相机采集的投影像素级图像得到误差区域后,选取控制点并计算目标移动点。利用这两组像素坐标点计算图像误差,结合区域控制和计算统一设备体系结构(CUDA)加速的MLS算法将控制点集合坐标像素点映射到目标移动点坐标,获取反向畸变图,最终以反向畸变校正畸变。实验结果表明,该方法可校正DLP光机微投畸变,最终校正后畸变平均值小于0.5 pixel,提升了投影质量。该方法对光固化3D打印行业有一定的贡献。To solve the problem of digital light processing(DLP)light curing 3D printer image distortion and aberration,a optical micro-projection distortion correction method based on moving least squares method(MLS)is proposed.This method identifies error regions based on pixel-level images captured by a plate camera,and selects control points,and calculates target moving points.By using these two sets of pixel coordinate points to determine the image error,the MLS algorithm,which combines area control and compute unified device architecture(CUDA)acceleration,maps the control point coordinates to the target moving point coordinates,producing an inverse aberration map.This inverse aberration map is then used to correcte the aberration.Experimental results show that this method can correct micro-projection distortion in DLP optical machine.The final correction error reaches 0.5 pixel in accuracy,which improves the projection quality.This advancement significantly benefits the light-curing 3D printing industry.

关 键 词：数字光处理光机 移动最小二乘法 投影畸变校正 区域控制 

分 类 号：TH741[机械工程—光学工程]