人体照相测量的误差因素分析

Analysis on the factors influencing the accuracy of human photogrammetry

为了找出影响照相测量方法准确度的因素,并最大程度地将其减弱甚至消除,选取了3种在成像质量和光学构造上具有代表性的数码相机,确定了5个拍摄距离和4个考察对象进行实验。通过对各种状态下测量得到的数据进行定性、定量分析和验证分析,得出人体照相测量产生误差的因素包括数码相机本身的光学构造、人为操作及后期测量等,其中光学误差基本符合球面变形规律。根据分析结果,提出了选择数码相机和优选数据测量软件的建议。

In order to find out the factors influencing errors of photogrammetry and reduce them to the minimum, experimentations were carried out with three digital cameras which are representative in optical constitution and imaging quality, five different photographing distances and four objects. Then, the data obtained under different conditions was processed using qualitative analysis, quantitative analysis and validity check. From the results it can be concluded that the factors affecting the accuracy of human body photogrammetry include the optical constitution of the camera, manual operation, and subsequent measurement etc. Optical error is basically conformed to the law of spherical surface deformation. According to the analysis results the suggestion to choose suitable digital camera and optimize the measurement software for getting good results was brought forward.