Halcon算子–图像、区域、轮廓、测量、拟合、垂足、夹角

read_image (Image,‘fabrik’)

画矩形

draw_rectangle1 (3600, Row1, Column1, Row2, Column2)

gen_rectangle1 (Rectangle, Row1, Column1, Row2, Column2)

缩减图像定义域

reduce_domain (Image, Rectangle, ImageReduced)

阈值分割出感兴趣的部分

threshold (ImageReduced, Region, 0, 65)

将不相互连接的区域分开为单独区域

connection (Region, ConnectedRegions)

根据区域面积筛选出指定区域

select_shape (ConnectedRegions, SelectedRegions, ‘area’, ‘and’, 2500, 5150)

测量算子

画仿射矩形

draw_rectangle2 (3600, Row5, Column4, Phi1, Length1, Length2)

gen_rectangle2 (Rectangle1, Row5, Column4, Phi1, Length1, Length2)

获取测量句柄

gen_measure_rectangle2 (Row5, Column4, Phi1, Length1, Length2, 512, 512, ‘nearest_neighbor’, MeasureHandle)

句柄，平滑参数，灰度差，极性，选择边缘点，边缘中心y,x坐标，幅度，距离

measure_pos (Image, MeasureHandle, 6.1, 65, ‘all’, ‘all’, RowEdge, ColumnEdge, Amplitude, Distance)

gen_cross_contour_xld (Cross, RowEdge, ColumnEdge, 6, Phi1)

close_measure (MeasureHandle)

图像–区域–轮廓

区域转轮廓

gen_contour_region_xld (SelectedRegions, Contours, ‘border’)

轮廓点坐标

get_contour_xld (Contours, Row, Col)

gen_cross_contour_xld (Cross1, Row, Col, 6, Phi1)

轮廓拟合圆

fit_circle_contour_xld (Contours, ‘algebraic’, -1, 0, 0, 3, 2, Row3, Column, Radius, StartPhi, EndPhi, PointOrder)

gen_circle_contour_xld (ContCircle, Row3, Column, Radius, 0, 6.28318, ‘positive’, 1)

轮廓拟合椭圆或椭圆弧

fit_ellipse_contour_xld (Contours, ‘fitzgibbon’, -1, 0, 0, 200, 3, 2, Row4, Column3, Phi, Radius1, Radius2, StartPhi1, EndPhi1, PointOrder1)

gen_ellipse_contour_xld (ContEllipse, Row4, Column3, Phi, Radius1, Radius2, 0, 6.28318, ‘positive’, 1.5)

图像–轮廓

提取亚像素精度边缘轮廓

edges_sub_pix (ImageReduced, Edges, ‘canny’, 1, 20, 40)

筛选出指定轮廓

select_contours_xld (Edges, SelectedContours, ‘contour_length’, 0, 50, -0.5, 0.5)

dev_set_color (‘green’)

拟合直线

fit_line_contour_xld (SelectedContours, ‘tukey’, -1, 0, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)

disp_line (3600, RowBegin, ColBegin, RowEnd, ColEnd)

拟合矩形

生成感兴趣的区域*

read_image (Image, ‘fabrik’)

draw_rectangle1 (3600, Row11, Column11, Row2, Column2)

gen_rectangle1 (Rectangle, Row11, Column11, Row2, Column2)

reduce_domain (Image, Rectangle, ImageReduced)

提取轮廓，拟合矩形

edges_sub_pix (ImageReduced, Edges, ‘canny’, 1, 20, 40)

select_contours_xld (Edges, SelectedContours, ‘contour_length’, 80, 800, -0.5, 0.5)

fit_rectangle2_contour_xld (SelectedContours, ‘regression’, -1, 0, 0, 3, 2, Row1, Column1, Phi1, Length11, Length21, PointOrder)

gen_rectangle2 (Rectangle1, Row1, Column1, Phi1, Length11, Length21)

计算垂足、夹角

read_image (Image, ‘fabrik’)

draw_rectangle1 (3600, Row1, Column1, Row2, Column2)

gen_rectangle1 (Rectangle, Row1, Column1, Row2, Column2)

reduce_domain (Image, Rectangle, ImageReduced)

edges_sub_pix (ImageReduced, Edges, ‘canny’, 1, 20, 40)

sort_contours_xld (Edges, SortedContours, ‘upper_left’, ‘true’, ‘row’)

取轮廓上的点

select_obj (SortedContours, ObjectSelected, 2)

get_contour_xld (ObjectSelected, Row, Col)

取轮廓上的线

select_obj (SortedContours, ObjectSelected1, 10)

fit_line_contour_xld (ObjectSelected1, ‘tukey’, -1, 0, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)

计算点到线的垂足

projection_pl (Row[0],Col[0],RowBegin, ColBegin, RowEnd, ColEnd ,RowProj, ColProj)

显示点、直线、垂足、垂线

gen_cross_contour_xld (Cross,Row[0],Col[0], 6, 0.785398)

disp_line (3600, RowBegin, ColBegin, RowEnd, ColEnd)

gen_cross_contour_xld (Cross1,RowProj, ColProj, 6, 0.785398)

disp_line (3600, Row[0],Col[0],RowProj, ColProj)

计算两条直线的夹角

angle_ll ( RowBegin, ColBegin, RowEnd, ColEnd, Row[0],Col[0],RowProj, ColProj, Angle)

弧度转角度deg,角度转弧度rad

Ang:=deg(Angle)

计算直线和水平轴x的夹角

angle_lx (RowBegin, ColBegin, RowEnd, ColEnd, Angle1)

Ang1:=deg(Angle1)

angle_lx (Row[0],Col[0],RowProj, ColProj, Angle2)

Ang2:=deg(Angle2)