智能手机与微型投影仪结合的人体局部特征三维建模  

Three-dimensional modeling of human body local features combined with smart phone and micro projector

作　　者：吴军[1] 刘少禹 张美妙 袁少博 祝玉恒 WU Jun;LIU Shaoyu;ZHANG Meimiao;YUAN Shaobo;ZHU yuheng(Aeronautical Engineering College,Civil Aviation University of China,Tianjin 300300,China;Electronic Information and Automation College,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]中国民航大学电子信息与自动化学院,天津300300

出　　处：《光学技术》2022年第3期257-265,共9页Optical Technique

基　　金：国家自然科学基金(52005500);天津市教委科研计划项目(2018KJ242);中央高校科研基本业务费(3122019088)。

摘　　要：将三维重建技术应用于医学整形领域,为医生提供可供参考的术前准备数据是辅助医学的有效手段。当前的三维扫描仪成本高、寿命短、结构尺寸大、维护困难,不利于该技术在医学整形领域的普及。提出一种基于智能手机摄影测量的人体局部特征三维成像方法,结合微型投影仪投射散斑图形至待测物体表面,智能手机采集下调制后的散斑图形,与事先准备好的散斑模板图形之间,利用图像局部灰度相关性进行匹配,实现三维模型重建,并通过多视角点云拼接技术恢复完整三维模型。提高了重建的效率和便捷性,以及具有低成本、操作简单的特点。以人体模特局部特征作为待重建表面,实现了弱纹理连续曲面的三维重建。实验结果表明该方法三维曲面重建平均误差为0.43mm、标准差为0.30mm,可满足实际测量的需求。Applying 3 D reconstruction technology to the field of medical plastic surgery is an effective means of assisting medicine to provide doctors with preoperative preparation data for reference.The current 3 D scanners have high cost,short lifespan,large structure and difficult maintenance,which are not conducive to the popularization of this technology in the field of medical plastic surgery.A 3 D imaging method of local human body features based on smartphone photogrammetry is proposed.The speckle pattern is projected onto the surface of the object to be measured by combining the micro projector.The modulated speckle pattern collected by the smartphone is combined with the prepared speckle template pattern.Between them,the local grayscale correlation of the image is used for matching to realize the reconstruction of the 3 D model,and the complete 3 D model is restored through the multi-view point cloud stitching technology.The efficiency and convenience of reconstruction are improved,and the utility model has the characteristics of low cost and simple operation.Taking the local features of the mannequin as the surface to be reconstructed,the 3 D reconstruction of the continuous surface with weak texture is realized.The experimental results show that the average error of 3 D surface reconstruction with this method is 0.43 mm and the standard deviation is 0.30 mm,which can meet the needs of actual measurement.

关 键 词：三维重建 智能手机 微型投影仪 人体局部特征 医学整形 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]