1、点到线
projection_pl.hdev，先在线上投影出点，再计算点与投影点的距离。求得点到直线的距离。
2、线、圆、弧
measure_metal_part_first_example.hdev
measure_metal_part.hdev
measure_metal_part_extended.hdev
3、网格
measure_grid.hdev
4、交点
线与线，弧与线
read_image (Image, 'C:/Users/Desktop/1.png') rgb1_to_gray (Image, Image) ***先找线与线的交点、大拐角的弧与线交点 points_sojka (Image, 9, 2.5, 0.75, 30, 90, 0.5, 'true', Row, Column) if (Row!=[]) gen_cross_contour_xld (Cross, Row, Column, 6, 0.785398) dev_display (Image) dev_display (Cross) else edges_sub_pix (Image, Edges, 'canny', 1, 20, 40) segment_contours_xld (Edges, ContoursSplit, 'lines_circles', 5, 4, 2) select_shape_xld (ContoursSplit, SelectedXLD, 'circularity', 'and', 0, 0.02) ***对于弧与线过度比较柔和的，找线的端点作为弧与线的交点 fit_line_contour_xld (SelectedXLD, 'tukey', -1, 0, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist) get_image_size (Image, Width, Height) * 获取线段远离边界的那个端点（即趋近于图片中心的点） if (abs(Height/2-RowBegin)+abs(Width/2-ColBegin)<abs(Height/2-RowEnd)+abs(Width/2-ColEnd)) gen_cross_contour_xld (Cross, RowBegin, ColBegin, 6, 0.785398) else gen_cross_contour_xld (Cross, RowEnd, ColEnd, 6, 0.785398) endif dev_display (Image) dev_display (Cross) endif