HALCON示例程序inspect_bottle_mouth.hdev玻璃瓶口缺陷检测

HALCON示例程序inspect_bottle_mouth.hdev玻璃瓶口缺陷检测

示例程序源码(加注释)

  • 定义变量并初始化
    SmoothX := 501
    ThresholdOffset := 25
    MinDefectSize := 50
    PolarResolution := 640
    RingSize := 70
    get_system (‘store_empty_region’, StoreEmptyRegion)
    set_system (‘store_empty_region’, ‘false’)
    read_image (Image, ‘bottles/bottle_mouth_01’)

  • 关于显示类函数解释
    dev_update_off ()
    dev_close_window ()
    dev_close_window ()
    dev_open_window_fit_image (Image, 0, 0, 640, 512, WindowHandle1)
    set_display_font (WindowHandle1, 16, ‘mono’, ‘true’, ‘false’)
    dev_display (Image)
    dev_set_draw (‘margin’)
    dev_set_line_width (3)
    dev_open_window_fit_size (0, 648, RingSize, PolarResolution, 150, 512, WindowHandle)
    dev_set_draw (‘margin’)
    dev_set_line_width (3)
    dev_set_color (‘red’)
    for Index := 1 to 16 by 1
    read_image (Image, ‘bottles/bottle_mouth_’ + Index$’.02’)

    • 使用形态学检测瓶口
    • 使用多个阈值来分割单通道图像
      auto_threshold (Image, Regions, 2)
    • 选取灰度值最小的分割区域
      select_obj (Regions, DarkRegion, 1)
    • 开运算
      opening_circle (DarkRegion, RegionOpening, 3.5)
    • 闭运算
      closing_circle (RegionOpening, RegionClosing, 25.5)
    • 填充孔洞
      fill_up (RegionClosing, RegionFillUp)
    • 提取区域边界
      boundary (RegionFillUp, RegionBorder, ‘outer’)
    • 膨胀边界
      dilation_circle (RegionBorder, RegionDilation, 3.5)
    • 将膨胀边界提取出
      reduce_domain (Image, RegionDilation, ImageReduced)
    • 通过拟合圆形找到瓶口中心
    • 关于edges_sub_pix算子解释传送门
      edges_sub_pix (ImageReduced, Edges, ‘canny’, 0.5, 20, 40)
    • 分割XLD轮廓,算子解释传送门
      segment_contours_xld (Edges, ContoursSplit, ‘lines_circles’, 5, 4, 2)
    • union_cocircular_contours_xld - 计算属于同一个圆的轮廓的并集。
    • union_cocircular_contours_xld(轮廓:合并的轮廓:两个圆弧的最大角距离,两个圆弧的最大重叠,连接线与圆弧切线之间的最大角度,两个圆弧之间间隙的最大长度,两个圆弧的最大半径差,两个圆弧的最大中心距离,是否合并没有拟合圆的小轮廓,迭代次数:)
      union_cocircular_contours_xld (ContoursSplit, UnionContours, 0.9, 0.5, 0.5, 200, 50, 50, ‘true’, 1)
    • XLD轮廓长度
      length_xld (UnionContours, Length)
    • sort_index - 对元组的元素进行排序并返回已排序元组的索引。取最长轮廓
      select_obj (UnionContours, LongestContour, sort_index(Length)[|Length| - 1] + 1)
    • 拟合圆形
      fit_circle_contour_xld (LongestContour, ‘ahuber’, -1, 0, 0, 3, 2, Row, Column, Radius, StartPhi, EndPhi, PointOrder)
    • 使用极坐标变换将瓶口圆环展开成矩形
    • 画圆
      gen_circle (Circle, Row, Column, Radius)
    • 膨胀
      dilation_circle (Circle, RegionDilation, 5)
    • 腐蚀
      erosion_circle (Circle, RegionErosion, RingSize - 5)
    • 求不同
      difference (RegionDilation, RegionErosion, RegionDifference)
    • 缩减定义域
      reduce_domain (Image, RegionDifference, ImageReduced)
    • polar_trans_image_ext - 将图像进行极坐标变换。
    • polar_trans_image_ext(图片:极坐标变换图,弧中心行坐标,弧中心列坐标,起始角度,结束角度,起始半径,结束半径,宽度,高度,差值方法:)
      polar_trans_image_ext (ImageReduced, ImagePolar, Row, Column, 0, rad(360), Radius - RingSize, Radius, PolarResolution, RingSize, ‘nearest_neighbor’)
    • 使用动态阈值寻找缺陷
      scale_image_max (ImagePolar, ImageScaleMax)
      mean_image (ImageScaleMax, ImageMean, SmoothX, 3)
      dyn_threshold (ImageScaleMax, ImageMean, Regions1, 55, ‘not_equal’)
      connection (Regions1, Connection)
      select_shape (Connection, SelectedRegions, ‘height’, ‘and’, 9, 99999)
    • 消除噪声区域
      closing_rectangle1 (SelectedRegions, RegionClosing1, 10, 20)
      union1 (RegionClosing1, RegionUnion)
    • 反极坐标变换
      polar_trans_region_inv (RegionUnion, XYTransRegion, Row, Column, 0, rad(360), Radius - RingSize, Radius, PolarResolution, RingSize, 1280, 1024, ‘nearest_neighbor’)
    • 显示结果
      dev_set_window (WindowHandle1)
      dev_display (Image)
      dev_set_color (‘blue’)
      dev_display (RegionDifference)
      dev_set_color (‘red’)
      dev_display (XYTransRegion)
    • 显示极坐标变换区域
      dev_set_window (WindowHandle)
    • 围绕图像中心旋转图像
      rotate_image (ImagePolar, ImageRotate, 90, ‘constant’)
      dev_display (ImageRotate)
      count_obj (RegionUnion, Number)
      if (Number > 0)
      • 镜像区域
        mirror_region (RegionUnion, RegionMirror, ‘diagonal’, PolarResolution)
        mirror_region (RegionMirror, RegionMirror, ‘row’, PolarResolution)
        dev_display (RegionMirror)
        disp_message (WindowHandle1, ‘Not OK’, ‘window’, -1, -1, ‘red’, ‘false’)

    else
    disp_message (WindowHandle1, ‘OK’, ‘window’, -1, -1, ‘forest green’, ‘false’)
    endif
    if (Index < 16)
    disp_continue_message (WindowHandle1, ‘black’, ‘true’)
    stop ()
    endif
    endfor

  • 恢复系统参数
    set_system (‘store_empty_region’, StoreEmptyRegion)

处理思路

这个例子是主要讲解了使用极坐标变换进行缺陷检测的例子。
auto_threshold 、select_obj ,自动阈值分割。
boundary提取区域边缘edges_sub_pix、segment_contours_xld、union_cocircular_contours_xld、length_xld、select_obj 、fit_circle_contour_xld 边界的提取、分割、合并、求长、选取、拟合。
polar_trans_image_ext极坐标变换polar_trans_region_inv反极坐标变换
mirror_region镜像区域

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。

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