HALCON示例程序measure_ring.hdev齿轮齿宽度测量

示例程序源码（加注释）

• 关于显示类函数解释
  read_image (Image, ‘rings_and_nuts’)
  dev_close_window ()
  dev_open_window_fit_image (Image, 0, 0, 640, 640, WindowHandle)
  set_display_font (WindowHandle, 14, ‘mono’, ‘true’, ‘false’)
  get_image_size (Image, Width, Height)
• 使用灰度直方图分割图像
  binary_threshold (Image, Region, ‘max_separability’, ‘dark’, UsedThreshold)
  connection (Region, ConnectedRegions)
  fill_up (ConnectedRegions, RegionFillUp)
• 返回区域紧凑度
  compactness (RegionFillUp, Compactness)
  for i := 0 to |Compactness| - 1 by 1
  if (Compactness[i] > 1.5 and Compactness[i] < 2.5)
  select_obj (RegionFillUp, ObjectSelected, i + 1)
  * 最小外接圆
  smallest_circle (ObjectSelected, Row, Column, RadiusMax)
  * 最大内接圆
  inner_circle (ObjectSelected, CenterRow, CenterCol, RadiusMin)
  Radius := (RadiusMax + RadiusMin) / 2.0
  AnnulusRadius := (RadiusMax - RadiusMin) / 4.0
  * 得到区域轮廓的多边形
  get_region_polygon (ObjectSelected, AnnulusRadius, RowsBorder, ColumnsBorder)
  SqrDistanceBorder := (RowsBorder - CenterRow) * (RowsBorder - CenterRow) + (ColumnsBorder - CenterCol) * (ColumnsBorder - CenterCol)
  * 按照升序对数组排序并返回索引号
  tuple_sort_index (SqrDistanceBorder, Indices)
  * 求取线性角度
  line_orientation (CenterRow, CenterCol, RowsBorder[Indices[0]], ColumnsBorder[Indices[0]], AngleStart)
  AngleExtent := rad(360)
  Interpolation := ‘bilinear’
  * 准备提取垂直于环形弧的直边。
  gen_measure_arc (CenterRow, CenterCol, Radius, AngleStart, AngleExtent, AnnulusRadius, Width, Height, Interpolation, MeasureHandle)
  Sigma := 1.0
  Threshold := 30
  Transition := ‘negative’
  Select := ‘all’
  * 提取垂直于矩形或环形弧的直边对。
  measure_pairs (Image, MeasureHandle, Sigma, Threshold, Transition, Select, RowEdgeFirst, ColumnEdgeFirst, AmplitudeFirst, RowEdgeSecond, ColumnEdgeSecond, AmplitudeSecond, IntraDistance, InterDistance)
  distance_pp (RowEdgeFirst, ColumnEdgeFirst, RowEdgeSecond, ColumnEdgeSecond, LinearDistance)
  AngularDistance := deg(IntraDistance / Radius)
  gen_empty_obj (Crosses)
  for J := 0 to |RowEdgeFirst| - 1 by 1
  gen_cross_contour_xld (Cross1, RowEdgeFirst[J], ColumnEdgeFirst[J], 12, atan2(CenterRow - RowEdgeFirst[J],ColumnEdgeFirst[J] - CenterCol))
  gen_cross_contour_xld (Cross2, RowEdgeSecond[J], ColumnEdgeSecond[J], 12, atan2(CenterRow - RowEdgeSecond[J],ColumnEdgeSecond[J] - CenterCol))
  concat_obj (Crosses, Cross1, Crosses)
  concat_obj (Crosses, Cross2, Crosses)
  endfor
  dev_display (Image)
  dev_set_line_width (2)
  dev_set_color (‘green’)
  dev_display (Crosses)
  Message := 'Number of cogs: ' + |RowEdgeFirst| Message[1] := 'Mean cog size:' Message[2] := '- Arc length: ' + mean(IntraDistance)$'.2f' + ' +/- ' + deviation(IntraDistance)$'.2f' + ' pixel' Message[3] := '- Linear: ' + mean(LinearDistance)$'.2f' + ' +/- ' + deviation(LinearDistance)$'.2f' + ' pixel' Message[4] := '- Angular: ' + mean(AngularDistance)$'.2f' + ' +/- ' + deviation(AngularDistance)$'.2f' + ' deg' disp_message (WindowHandle, Message, 'window', 260, 10, 'black', 'true')
  close_measure (MeasureHandle)
  disp_continue_message (WindowHandle, ‘black’, ‘true’)
  stop ()
  endif
  endfor

处理思路

这个例子是主要讲解了如何使用gen_measure_arc、measure_pairs 搭配提取垂直圆弧的直边。

后记

大家有什么问题可以向我提问哈，我看到了第一时间回复，希望在学习的路上多多结交良师益友。