A calibration procedure was developed for three-dimensional(3D) binocular structured light measurement systems. In virtue of a specially designed pattern, matching points in stereo images are extracted. And then suffi...A calibration procedure was developed for three-dimensional(3D) binocular structured light measurement systems. In virtue of a specially designed pattern, matching points in stereo images are extracted. And then sufficient 3D space points are obtained through pairs of images with the intrinsic and extrinsic parameters of each camera estimated prior and consequently some lights are calibrated by means of multi point fitting. Finally, a mathematical model is applied to interpolate and approximate all dynamic scanning lights based on geometry. The process of calibration method is successfully used in the binocular 3D measurement system based on structured lights and the 3D reconstruction results are satisfying.展开更多
基金The National Natural Science Foundation of China (No30470488)
文摘A calibration procedure was developed for three-dimensional(3D) binocular structured light measurement systems. In virtue of a specially designed pattern, matching points in stereo images are extracted. And then sufficient 3D space points are obtained through pairs of images with the intrinsic and extrinsic parameters of each camera estimated prior and consequently some lights are calibrated by means of multi point fitting. Finally, a mathematical model is applied to interpolate and approximate all dynamic scanning lights based on geometry. The process of calibration method is successfully used in the binocular 3D measurement system based on structured lights and the 3D reconstruction results are satisfying.
文摘目的将3D成像技术应用于注射隆下颏的术前、术后即刻及术后6个月的测量,为临床颏部注射填充效果评估提供更完善的数据参考。方法自2018年7月至2019年1月,以脂肪干细胞胶(stromal vascular fraction-gel,SVF-gel)注射隆下颏进行面部轮廓重塑,符合入组条件32例,年龄18~45岁,用Artec Eva 3D扫描仪对颏部术前、术后即刻及术后6个月采集3D成像数据,并从线距、角度等方面进行对比,综合评估治疗效果并进行统计学分析。结果32例患者注射隆颏后未出现并发症,失访2例,共收集数据30例,对颏部塑形效果均较满意。基于本研究组制定的颏部3D成像测量评估指标,30例患者术前、术后即刻及术后6个月下颏冠状位、矢状位的线距、角度等数据变化值均具有统计学意义(P<0.01)。结论应用3D成像技术测量和评估颏部注射SVF-gel塑形手术的术后效果,较传统方法更直观、精确和客观,值得临床应用。
