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HALCON示例程序rim.hdev輪圈孔檢測提取字符

示例程序源碼（加注釋）

• 關于顯示類函數解釋
  dev_update_off ()
  dev_close_window ()
  dev_open_window (0, 0, 768, 576, ‘black’, WindowID)
  set_display_font (WindowID, 16, ‘mono’, ‘true’, ‘false’)
  read_image (Rim, ‘rim’)
  dev_display (Rim)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 二值化
  threshold (Rim, Dark, 0, 128)
  dev_display (Rim)
  dev_set_color (‘green’)
  dev_set_draw (‘fill’)
  dev_display (Dark)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 分割連通域
  connection (Dark, DarkRegions)
• 使用圓度與面積篩選區域
  select_shape (DarkRegions, Circles, [‘circularity’,‘area’], ‘and’, [0.85,50], [1.0,99999])
  dev_display (Rim)
  dev_set_colored (12)
  dev_display (Circles)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 使用圓形膨脹
  dilation_circle (Circles, ROIOuter, 8.5)
• 使用圓形腐蝕
  erosion_circle (Circles, ROIInner, 8.5)
• 求不同
  difference (ROIOuter, ROIInner, ROI)
• 合并區域
  union1 (ROI, ROIEdges)
  dev_display (Rim)
  dev_set_draw (‘margin’)
  dev_set_line_width (3)
  dev_set_color (‘green’)
  dev_display (ROIEdges)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 縮減定義域，求取邊緣
  reduce_domain (Rim, ROIEdges, RimReduced)
  edges_sub_pix (RimReduced, Edges, ‘canny’, 4, 20, 40)
• 篩選邊緣
  select_contours_xld (Edges, RelEdges, ‘length’, 30, 999999, 0, 0)
  dev_display (Rim)
  dev_set_colored (12)
  dev_display (RelEdges)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 擬合橢圓
  fit_ellipse_contour_xld (RelEdges, ‘ftukey’, -1, 2, 0, 200, 3, 2, Row, Column, Phi, Ra, Rb, StartPhi, EndPhi, PointOrder)
  display_ellipses (Rim, Row, Column, Phi, Ra, Rb, WindowID)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 使用高斯平滑濾波
  gauss_filter (Rim, RimGauss, 11)
• 動態閾值分割區域
  dyn_threshold (Rim, RimGauss, SmallAndDarkerRegion, 5, ‘dark’)
  dev_display (Rim)
  dev_set_draw (‘fill’)
  dev_set_color (‘green’)
  dev_display (SmallAndDarkerRegion)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 分割連通域
  connection (SmallAndDarkerRegion, SmallAndDarker)
• 通過面積篩選區域
  select_shape (SmallAndDarker, CharCandidates, ‘area’, ‘and’, 40, 400)
• 使用長短軸篩選區域
  select_shape (CharCandidates, PossibleChar, [‘ra’,‘rb’], ‘and’, [10,5], [20,30])
  dev_display (Rim)
  dev_set_colored (12)
  dev_display (PossibleChar)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 合并區域
  union1 (PossibleChar, ROI)
• 使用圓形元素進行閉運算
  closing_circle (ROI, CharRegion, 17.5)
• 分割連通域
  connection (CharRegion, CharBlocks)
  dev_display (Rim)
  dev_set_draw (‘margin’)
  dev_display (CharBlocks)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
• 使用面積對區域進行篩選
  select_shape (CharBlocks, CharRegion, ‘area’, ‘and’, 400, 99999)
• 對區域進行型轉變換，求取最小外接矩形
  shape_trans (CharRegion, ROIChar, ‘rectangle2’)
  dev_display (Rim)
  dev_set_color (‘green’)
  dev_display (ROIChar)
  disp_continue_message (WindowID, ‘black’, ‘true’)
  stop ()
  display_ellipses (Rim, Row, Column, Phi, Ra, Rb, WindowID)
• 求取交集
  intersection (CharCandidates, ROIChar, Characters)
  dev_set_colored (12)
  dev_display (Characters)
• 求最小外接矩形
  smallest_rectangle2 (ROIChar, RowChar, ColumnChar, PhiChar, Length1Char, Length2Char)
• 創建標準轉換矩陣
  hom_mat2d_identity (HomMat2DIdentity)
• 旋轉
  hom_mat2d_rotate (HomMat2DIdentity, rad(180) - PhiChar, RowChar, ColumnChar, HomMat2DRotate)
• 平移
  affine_trans_region (Characters, CharRotated, HomMat2DRotate, ‘constant’)
• 進行仿射變換
  affine_trans_image (Rim, RimRotated, HomMat2DRotate, ‘weighted’, ‘false’)
  dev_open_window (0, 800, 192, 144, ‘black’, WindowChar)
• 合并區域
  union1 (CharRotated, CharRotatedAll)
• 求區域最小外接矩形
  smallest_rectangle1 (CharRotatedAll, Row1, Column1, Row2, Column2)
  ZoomHeight := Row2 - Row1 + 1
  ZoomWidth := Column2 - Column1 + 1
  ZoomFactor := min([768 / ZoomWidth,576 / ZoomHeight])
  ZoomRow := (Row1 + Row2) / 2
  ZoomColumn := (Column1 + Column2) / 2
  dev_set_part (ZoomRow - 576 / ZoomFactor / 2, ZoomColumn - 768 / ZoomFactor / 2, ZoomRow + 576 / ZoomFactor / 2 - 1, ZoomColumn + 768 / ZoomFactor / 2 - 1)
  dev_display (RimRotated)
  dev_set_draw (‘fill’)
  dev_set_colored (12)
  dev_display (CharRotated)

處理思路

這個例子是主要講解了使用blob方法進行孔洞測量；使用動態閾值進行字符區域提取。

后記

大家有什么問題可以向我提問哈，我看到了第一時間回復，希望在學習的路上多多結交良師益友。