Reconstruction method of line parameters in traffic accident scene plane by photogrammetry
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摘要: 以空间直线的三维重建原理为基础, 通过现场空间直线段在摄影测量系统空间下的三维重建, 实现了道路交通事故现场图绘制平面的最小中值二乘拟合, 并完成了现场空间直线从摄影测量系统空间向道路交通事故现场图绘制平面的转换, 实现了道路交通事故现场平面直线参数的检测和重建。对摄影测量系统世界坐标系下现场图平面、中心线及左、右边缘线的三维重建进行了试验, 并得到了中心线及左、右边缘线在现场图平面上的投影直线方程和投影图。试验结果表明: 左、右边缘线和中心线在现场图平面上的投影与x轴的夹角之差均小于0.1°, 道路的边缘线与中心线基本平行, 测量精度较好。Abstract: Based on the theory of 3D reconstruction of space lines and through 3D reconstruction of scene space lines under photogrammetry system, the drawing plane of traffic accident scene was constructed by the least median of squares method, and the scene space lines' transformations from photogrammetry system space to road traffic accident drawing plane were completed.The examination and reconstruction of lines' parameters in road traffic accident scene plane were realized.Test was done to reconstruct drawing plane, middle line, right and left edge lines in the reference frame of photogrammetry system.The projective equations of middle line, right and left edge lines in drawing plane were calculated, and the lines were drawn in drawing plane.Test result indicates that the differences of angles among edge lines, middle line and x axis are less than 0.1°, and edge lines and middle line are almost parallel, so the measurement precision is exact.
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Key words:
- traffic safety /
- accident scene /
- 3D reconstruction /
- line parameter
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表 2 直线的三维重建结果
Table 2. 3D reconstruction results of lines
mm 直线 图像 直线方程 左边缘线 图 3(a) -1 291.656 260x+2.753 161y+2 970.801 888z- 4 436 796.023 753=0 图 3(b) -1 014.879 914x+8.960 057y+2 900.473 750z- 3 474 158.368 731=0 中心线 图 3(a) -12 454.323 196x-15.013 268y+3 362.734 361z- 5 170 533.891 861=0 图 3(b) -3 305.877 507x+8.416 022y+2 781.617 549z- 1 432 720.062 337=0 右边缘线 图 3(a) 1 454.931 186x+10.197 967y+2 872.938 079z- 4 249 271.201 950=0 图 3(b) 2 148.952 042x+18.751 242y+3 060.188 306z- 6 273 393.514 749=0 
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表 3 现场图平面方程及直线投影方程
Table 3. Scene drawing plane equation and line projected equations
方程 方程/mm 与x轴的夹角/ (°) 现场图平面方程 0.03x-0.01y-z+59.24=0 — 左边缘线 626.909 0x-y+2.420 8×106=0 89.91 中心线 398.850 9x-y+1.714 8×106=0 89.86 右边缘线 654.731 0x-y-1.799 2×106=0 89.91
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