HALCON示例程序measure_circuit_width_lines_gauss.hdev電路板線寬檢測

示例程序源碼（加注釋）

• 關于顯示類函數解釋
  dev_update_off ()
  dev_close_window ()
  read_image (Image, ‘pcb_color’)
  get_image_size (Image, Width, Height)
  dev_open_window_fit_image (Image, 0, 0, -1, -1, WindowHandle)
  set_display_font (WindowHandle, 16, ‘mono’, ‘true’, ‘false’)
  dev_display (Image)
  dev_set_draw (‘margin’)
  dev_set_color (‘yellow’)
• Define the minimum and maximum width of the pcb tracks
  MaxTrackWidth := 6.0
  MinTrackWidth := 4.0
• Select a sub-region of the image
  Rectangle := [271,285,528,718]
  gen_rectangle1 (PcbPart, Rectangle[0], Rectangle[1], Rectangle[2], Rectangle[3])
  dev_display (Image)
  dev_display (PcbPart)
  disp_message (WindowHandle, ‘Measure the width of tracks using lines_gauss’, ‘window’, 12, 12, ‘black’, ‘true’)
  disp_continue_message (WindowHandle, ‘black’, ‘true’)
  stop ()
  dev_set_part (Rectangle[0] - 15, Rectangle[1] - 15, Rectangle[2] + 15, Rectangle[3] + 15)
  dev_display (Image)
  dev_display (PcbPart)
  disp_message (WindowHandle, ‘Exemplarily shown here for a part of the circuit board’, ‘window’, 12, 12, ‘black’, ‘true’)
  disp_continue_message (WindowHandle, ‘black’, ‘true’)
  stop ()
• Extract the tracks
  decompose3 (Image, ImageR, ImageG, ImageB)
  reduce_domain (ImageG, PcbPart, ImageReduced)
  threshold (ImageReduced, Region, 90, 255)
  dilation_circle (Region, RegionDilation, 3.5)
  opening_rectangle1 (Region, RegionOpening, 8, 8)
  dilation_circle (RegionOpening, RegionDilation1, 3.5)
  difference (Region, RegionDilation1, RegionDifference)
  difference (RegionDilation, RegionDilation1, RegionDifference)
  connection (RegionDifference, ConnectedRegions)
  select_shape (ConnectedRegions, RegionSelected, ‘area’, ‘and’, 260, 4595)
  union1 (RegionSelected, RegionTracks)
  reduce_domain (ImageReduced, RegionTracks, ImageReducedTracks)
• lines_gauss - 檢測線條及其寬度。
• lines_gauss（圖片：輸出線：高斯平滑值，滯后閾值低值，滯后閾值高值，線條是暗是亮，線條屬性，找線條模式，在無法提取線條處添加交叉點:)
  lines_gauss (ImageReducedTracks, Lines, 1.5, 1, 8, ‘light’, ‘true’, ‘bar-shaped’, ‘true’)
• 通過連續長度篩選線條
  select_shape_xld (Lines, SelectedXLD, ‘contlength’, ‘and’, 20, 99999)
  dev_display (Image)
  dev_set_color (‘yellow’)
  dev_display (PcbPart)
  dev_set_color (‘green’)
  dev_set_line_width (2)
  dev_display (Lines)
  disp_message (WindowHandle, ‘Extracted tracks’, ‘window’, 12, 12, ‘black’, ‘true’)
  disp_continue_message (WindowHandle, ‘black’, ‘true’)
  stop ()
  count_obj (SelectedXLD, NumberL)
  RowLine := []
  ColLine := []
  LineWidth := []

for IndexL := 1 to NumberL by 1select_obj (SelectedXLD, Line, IndexL)*get_contour_xld - 返回XLD輪廓的坐標。get_contour_xld（輪廓:::行，列）get_contour_xld (Line, Row, Column)*get_contour_attrib_xld - XLD輪廓的返回點屬性值。get_contour_attrib_xld（輪廓::屬性：值）get_contour_attrib_xld (Line, 'width_left', WidthL)get_contour_attrib_xld (Line, 'width_right', WidthR)RowLine := [RowLine,Row]ColLine := [ColLine,Column]LineWidth := [LineWidth,WidthR + WidthL]endfor

tuple_find (min2(LineWidth,MaxTrackWidth), MaxTrackWidth, IndicesTooBroad)
tuple_find (max2(LineWidth,MinTrackWidth), MinTrackWidth, IndicesTooNarrow)

if (IndicesTooBroad == -1)IndicesTooBroad := [] endif if (IndicesTooNarrow == -1)IndicesTooNarrow := [] endif

• 將各個點組成一個區域
  gen_region_points (RegionTooBroad, subset(RowLine,IndicesTooBroad), subset(ColLine,IndicesTooBroad))
  gen_region_points (RegionTooNarrow, subset(RowLine,IndicesTooNarrow), subset(ColLine,IndicesTooNarrow))
  connection (RegionTooBroad, RegionTooBroad)
• 將骨架轉換為XLD輪廓。
  gen_contours_skeleton_xld (RegionTooBroad, TracksTooBroad, 1, ‘filter’)
  smallest_circle (RegionTooBroad, RowTooBroad, ColumnTooBroad, RadiusTooBroad)
  gen_circle_contour_xld (CircleTooBroad, RowTooBroad, ColumnTooBroad, min2(RadiusTooBroad + 10,20), 0, 6.28318, ‘positive’, 1)
  connection (RegionTooNarrow, RegionTooNarrow)
  gen_contours_skeleton_xld (RegionTooNarrow, TracksTooNarrow, 1, ‘filter’)
  smallest_circle (RegionTooNarrow, RowTooNarrow, ColumnTooNarrow, RadiusTooNarrow)
  gen_circle_contour_xld (CircleTooNarrow, RowTooNarrow, ColumnTooNarrow, min2(RadiusTooNarrow + 10,20), 0, 6.28318, ‘positive’, 1)
  dev_clear_window ()
  dev_display (Image)
  dev_display (ImageReduced)
  dev_set_line_width (1)
  dev_set_color (‘green’)
  dev_display (Lines)
  dev_set_line_width (2)
  dev_set_color (‘red’)
  dev_display (TracksTooBroad)
  dev_display (CircleTooBroad)
  dev_set_color (‘magenta’)
  dev_display (CircleTooNarrow)
  dev_display (TracksTooNarrow)
  disp_message (WindowHandle, [‘Extracted tracks’,’ - Too broad’,’ - Too narrow’], ‘window’, 12, 12, [‘black’,‘red’,‘magenta’], ‘true’)

處理思路

這個例子是主要講解了lines_gauss算子的應用。一個能夠提取線段的算子。

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。

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