一,检测需求

        图片中的芯片会发送位置变换，需要检测芯片的针脚数量是否缺少，芯片的每一根针脚宽度是否达到要求。图像如下：

 二，halcon代码讲解

1. 先读取一张图片，准备用来创建模板。
2. 创建图像模板，选择芯片的中心图案作为模板。
3. 绘制测量矩形，用两个测量矩形测量针脚。
4. 开始读取待检测图像进行匹配，匹配后进行仿射变换，将绘制的两个矩形位置也经行变换。然后测量针脚，判断结果显示。详细代码如下。

   * 读取文件夹中的图像，模拟相机采集
   list_files ('D:/File/c# code/ce liang/bin/Debug/图像', ['files','follow_links'], ImageFiles)
   tuple_regexp_select (ImageFiles, ['\\.(tif|tiff|gif|bmp|jpg|jpeg|jp2|png|pcx|pgm|ppm|pbm|xwd|ima|hobj)$','ignore_case'], ImageFiles)
   for Index := 0 to |ImageFiles| - 1 by 1
       read_image (ImageCheck, ImageFiles[Index])
       get_image_size (ImageCheck, Width, Height)
       *进行模板匹配
       find_shape_model (ImageCheck, ModelID, rad(0), rad(360), 0.5, 1, 0.5, 'least_squares', 0, 0.9,RowCheck, ColumnCheck, AngleCheck, Score)
        *仿射变换，匹配成功才进行
       if (|Score| > 0)
           *匹配    
           hom_mat2d_identity (HomMat2DIdentity)
           hom_mat2d_translate (HomMat2DIdentity, RowCheck, ColumnCheck, HomMat2DTranslate)
           hom_mat2d_rotate (HomMat2DTranslate, AngleCheck, RowCheck, ColumnCheck, HomMat2DRotate)
           *变换模板轮廓
           affine_trans_contour_xld (ModelContours, ShapeModelTrans, HomMat2DRotate)
           dev_display (ShapeModelTrans)
           *转换绘制的两个矩形的点
           affine_trans_pixel (HomMat2DRotate, rectRow2, rectColumn2, Rect1RowCheck, Rect1ColCheck)
           affine_trans_pixel (HomMat2DRotate, rectRow3, rectColumn3, Rect2RowCheck, Rect2ColCheck)
           *根据转换后位置生成两个测量矩形
           gen_rectangle2 (Rectangle1Check, Rect1RowCheck, Rect1ColCheck, AngleCheck, rect1Width, rect1Height)
           gen_rectangle2 (Rectangle2Check, Rect2RowCheck, Rect2ColCheck, AngleCheck,  rect2Width, rect2Height)
           dev_set_color ('blue')
           dev_set_draw ('margin')
           dev_set_line_width (3)
           dev_display (Rectangle1Check)
           dev_display (Rectangle2Check)
           count_seconds (S1)
           gen_measure_rectangle2 (Rect1RowCheck, Rect1ColCheck, AngleCheck, rect1Width, rect1Height, Width, Height, 'bilinear', MeasureHandle1)
           gen_measure_rectangle2 (Rect2RowCheck, Rect2ColCheck, AngleCheck, rect2Width, rect2Height, Width, Height, 'bilinear', MeasureHandle2)
           *测量，使用测量队模式，将一组边缘作为一对
           measure_pairs (ImageCheck, MeasureHandle1, 3, 99, 'positive', 'all', RowEdgeFirst1, ColumnEdgeFirst1, AmplitudeFirst1, RowEdgeSecond1, ColumnEdgeSecond1, AmplitudeSecond1, IntraDistance1, InterDistance1)
           measure_pairs (ImageCheck, MeasureHandle2, 3, 99, 'positive', 'all', RowEdgeFirst2, ColumnEdgeFirst2, AmplitudeFirst2, RowEdgeSecond2, ColumnEdgeSecond2, AmplitudeSecond2, IntraDistance2, InterDistance2)
           close_measure (MeasureHandle1)
           close_measure (MeasureHandle2)
           count_seconds (S2)
           dev_set_color ('red')
           *画线对，把测量到的边缘绘制显示
           disp_line (WindowHandle, RowEdgeFirst1 - rect1Height * cos(AngleCheck), ColumnEdgeFirst1 - rect1Height * sin(AngleCheck), RowEdgeFirst1 + rect1Height * cos(AngleCheck), ColumnEdgeFirst1 + rect1Height * sin(AngleCheck))
           disp_line (WindowHandle, RowEdgeSecond1 - rect1Height * cos(AngleCheck), ColumnEdgeSecond1 - rect1Height * sin(AngleCheck), RowEdgeSecond1 + rect1Height * cos(AngleCheck), ColumnEdgeSecond1 + rect1Height * sin(AngleCheck))
           disp_line (WindowHandle, RowEdgeFirst2 - rect2Height * cos(AngleCheck), ColumnEdgeFirst2 - rect2Height * sin(AngleCheck), RowEdgeFirst2 + rect2Height * cos(AngleCheck), ColumnEdgeFirst2 + rect2Height * sin(AngleCheck))
           disp_line (WindowHandle, RowEdgeSecond2 - rect2Height * cos(AngleCheck), ColumnEdgeSecond2 - rect2Height * sin(AngleCheck), RowEdgeSecond2 + rect2Height * cos(AngleCheck), ColumnEdgeSecond2 + rect2Height * sin(AngleCheck))
           dev_set_line_width (1)
           *测量时间
           time:=S2-S1 
           *针脚大小判断
           distance_threshold:=10.5 
           wrongdistance:=[]
           wrongRow:=[]
           wrongCol:=[]
           *从第一个测量矩形判断，判断每一个针脚的宽度是否符合要求，将不符合要求的针脚边缘中心的坐标保存
           for Index1 := 0 to |IntraDistance1|-1 by 1
               if(IntraDistance1[Index1]
                   wrongRow:=[wrongRow,RowEdgeFirst1[Index1]]
                   wrongCol:=[wrongCol,ColumnEdgeFirst1[Index1]]
                   *将缺陷距离保存
                   wrongdistance:=[wrongdistance,IntraDistance1[Index1]]
               endif
           endfor
           *判断第二个测量矩形的结果
           for Index2 := 0 to |IntraDistance2|-1 by 1
               if(IntraDistance2[Index2]
                   wrongRow:=[wrongRow,RowEdgeFirst2[Index2]]
                   wrongCol:=[wrongCol,ColumnEdgeFirst2[Index2]]
                   *将缺陷距离保存
                   wrongdistance:=[wrongdistance,IntraDistance2[Index2]]
               endif
           endfor
           *针脚总数计算  
           set_display_font (WindowHandle, 10, 'mono', 'true', 'false')
           NumLeads := |IntraDistance1| + |IntraDistance2|
           *显示结果模块
           if (NumLeads<28)      
               disp_message (WindowHandle, '缺少针脚', 'window', 20, 20, 'red', 'false')
           elseif (|wrongRow|>0)            
              dev_set_draw ('margin')
              dev_set_color ('red')
              dev_clear_window ()
              dev_display (ImageCheck)
              *显示不合格的针脚
              for Index3 := 0 to |wrongRow|-1 by 1
                  disp_circle (WindowHandle, wrongRow[Index3], wrongCol[Index3], 6.0)
                  disp_message (WindowHandle, wrongdistance[Index3]$'.2f', 'window', wrongRow[Index3]-30, wrongCol[Index3]-50, 'black', 'true')
              endfor           
              disp_message (WindowHandle, '针脚有缺陷', 'window', 20, 20, 'red', 'false')
           else
               dev_set_color ('green')
               disp_message (WindowHandle, '图像OK,针脚数：'+NumLeads, 'window', 20, 20,'green', 'true')
           endif
           stop()
       * Image Acquisition 01: Do something
      endif     
   endfor
   

 三，检测示意图

 最后的检测效果如下，左上角显示检测结果。

结语

在本专栏下一篇文章中，将实现halocn代码的导出，和c#软件界面的搭建。

这里是图像文件和halcon的源码

链接：https://pan.baidu.com/s/1MhI64rQA2GAIIjdMZ7R8iw 
提取码：wtu2

链接：https://pan.baidu.com/s/119fA7JdX_Hgh-GyMIvBC5w 
提取码：7f2q