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HALCON示例程序rim.hdev轮圈孔检测提取字符

示例程序源码（加注释）

关于显示类函数解释
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 ()
分割连通域
connection (Dark, DarkRegions)
使用圆度与面积筛选区域
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 ()
使用圆形膨胀
dilation_circle (Circles, ROIOuter, 8.5)
使用圆形腐蚀
erosion_circle (Circles, ROIInner, 8.5)
求不同
difference (ROIOuter, ROIInner, ROI)
合并区域
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 ()
缩减定义域，求取边缘
reduce_domain (Rim, ROIEdges, RimReduced)
edges_sub_pix (RimReduced, Edges, ‘canny’, 4, 20, 40)
筛选边缘
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 ()
拟合椭圆
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 ()
使用高斯平滑滤波
gauss_filter (Rim, RimGauss, 11)
动态阈值分割区域
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 ()
分割连通域
connection (SmallAndDarkerRegion, SmallAndDarker)
通过面积筛选区域
select_shape (SmallAndDarker, CharCandidates, ‘area’, ‘and’, 40, 400)
使用长短轴筛选区域
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 ()
合并区域
union1 (PossibleChar, ROI)
使用圆形元素进行闭运算
closing_circle (ROI, CharRegion, 17.5)
分割连通域
connection (CharRegion, CharBlocks)
dev_display (Rim)
dev_set_draw (‘margin’)
dev_display (CharBlocks)
disp_continue_message (WindowID, ‘black’, ‘true’)
stop ()
使用面积对区域进行筛选
select_shape (CharBlocks, CharRegion, ‘area’, ‘and’, 400, 99999)
对区域进行型转变换，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)
创建标准转换矩阵
hom_mat2d_identity (HomMat2DIdentity)
旋转
hom_mat2d_rotate (HomMat2DIdentity, rad(180) - PhiChar, RowChar, ColumnChar, HomMat2DRotate)
平移
affine_trans_region (Characters, CharRotated, HomMat2DRotate, ‘constant’)
进行仿射变换
affine_trans_image (Rim, RimRotated, HomMat2DRotate, ‘weighted’, ‘false’)
dev_open_window (0, 800, 192, 144, ‘black’, WindowChar)
合并区域
union1 (CharRotated, CharRotatedAll)
求区域最小外接矩形
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)

处理思路

这个例子是主要讲解了使用blob方法进行孔洞测量；使用动态阈值进行字符区域提取。

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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HALCON示例程序rim.hdev轮圈孔检测提取字符

HALCON示例程序rim.hdev轮圈孔检测提取字符

示例程序源码（加注释）

处理思路

后记

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