Example Analysis of Halcon operator
This article shows you an example analysis of the Halcon operator, which is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.
Read_image (Image,'fabrik')
* draw a rectangle
Draw_rectangle1 (3600, Row1, Column1, Row2, Column2)
Gen_rectangle1 (Rectangle, Row1, Column1, Row2, Column2)
* reduce the domain of image definition
Reduce_domain (Image, Rectangle, ImageReduced)
* threshold segmenting the parts of interest
Threshold (ImageReduced, Region, 0,65)
* separate areas that are not connected into separate areas
Connection (Region, ConnectedRegions)
* filter the designated area according to the area area
Select_shape (ConnectedRegions, SelectedRegions, 'area',' and', 2500, 5150)
* Measurement operator * *
* draw an affine rectangle
Draw_rectangle2 (3600, Row5, Column4, Phi1, Length2, Length3)
Gen_rectangle2 (Rectangle1, Row5, Column4, Phi1, Length2, Length3)
* get the measurement handle
Gen_measure_rectangle2 (Row5, Column4, Phi1, Length2, Length3, 512,512, 'nearest_neighbor', MeasureHandle)
* handle, smoothing parameters, grayscale difference, polarity, selection of edge points, edge center y _ (th) x coordinates, amplitude, distance
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)
* Image-region-outline *
* region turning contours
Gen_contour_region_xld (SelectedRegions, Contours, 'border')
* outline point coordinates
Get_contour_xld (Contours, Row, Col)
Gen_cross_contour_xld (Cross1, Row, Col, 6, Phi1)
* outline fitting circle
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)
* profile fitting ellipse or elliptical arc
Fit_ellipse_contour_xld (Contours, 'fitzgibbon',-1,0,0,0,200,3,2, Row4, Column3, Phi, Radius1, Radius2, StartPhi1, EndPhi1, PointOrder1)
Gen_ellipse_contour_xld (ContEllipse, Row4, Column3, Phi, Radius1, Radius2, 0, 6.28318, 'positive', 1.5)
* * Image-outline * *
* extract sub-pixel precision edge contours
Edges_sub_pix (ImageReduced, Edges, 'canny', 1,20,40)
* filter out the specified profile
Select_contours_xld (Edges, SelectedContours, 'contour_length', 0,50,-0.5,0.5)
Dev_set_color ('green')
* fit straight line
Fit_line_contour_xld (SelectedContours, 'tukey',-1, 0, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)
Disp_line (3600, RowBegin, ColBegin, RowEnd, ColEnd)
* * fit rectangle * *
* generate areas of interest
Read_image (Image, 'fabrik')
Draw_rectangle1 (3600, Row11, Column11, Row2, Column2)
Gen_rectangle1 (Rectangle, Row11, Column11, Row2, Column2)
Reduce_domain (Image, Rectangle, ImageReduced)
* extract contours and fit rectangles
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, Length21, Length31, PointOrder)
Gen_rectangle2 (Rectangle1, Row1, Column1, Phi1, Length21, Length31)
* * calculate the vertical foot and the included angle * *
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')
* take the points on the outline
Select_obj (SortedContours, ObjectSelected, 2)
Get_contour_xld (ObjectSelected, Row, Col)
* take the line on the outline
Select_obj (SortedContours, ObjectSelected1, 10)
Fit_line_contour_xld (ObjectSelected1, 'tukey',-1, 0, 5, 2, RowBegin, ColBegin, RowEnd, ColEnd, Nr, Nc, Dist)
* calculate the vertical foot from point to line
Projection_pl (Row [0], Col [0], RowBegin, ColBegin, RowEnd, ColEnd, RowProj, ColProj)
* display points, lines, vertical feet, vertical lines
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)
* calculate the angle between two lines
Angle_ll (RowBegin, ColBegin, RowEnd, ColEnd, Row [0], Col [0], RowProj, ColProj, Angle)
* Radian to angle deg, angle to Radian rad
Ang:=deg (Angle)
* calculate the angle between the line and the horizontal axis x
Angle_lx (RowBegin, ColBegin, RowEnd, ColEnd, Angle1)
Ang1:=deg (Angle1)
Angle_lx (Row [0], Col [0], RowProj, ColProj, Angle2)
Ang2:=deg (Angle2)
The above is a sample analysis of the Halcon operator. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.
