【halcon每日一练】

最新推荐文章于 2025-04-30 14:31:47 发布

火星wen

最新推荐文章于 2025-04-30 14:31:47 发布

阅读量321

点赞数

分类专栏： halcon 文章标签：计算机视觉人工智能图像识别

本文链接：https://blog.youkuaiyun.com/weixin_42727896/article/details/126644159

版权

halcon 专栏收录该内容

12 篇文章

订阅专栏

该博客介绍了一种图像处理方法，通过灰度转换、形态学操作和轮廓拟合来识别摄像头图像中的内外环，并计算它们的直径。通过中心点检测和平移变换，确定内环和外环的相对位置，进而测量两者之间的平均距离。最后，用箭头显示测量结果并输出在图像上，提供了一种精确的自动测量技术。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

#摄像头内外环直径测量

dev_update_off ()
dev_get_window (WindowHandle)
read_image (inImage, 'C:/Users/njtl003/Desktop/111.bmp')
get_image_size (inImage, Width, Height)
rgb1_to_gray (inImage, GrayImage)
*筛选出黑色区域
fast_threshold (GrayImage, Region, 0, 100, 1)
closing_circle (Region, RegionClosing, 5.5)
connection (RegionClosing, ConnectedRegions)
fill_up (ConnectedRegions, RegionFillUp)
*选取面积较大的外环
select_shape_std (RegionFillUp, SelectedRegions, 'max_area', 70)
boundary (SelectedRegions, RegionBorder, 'inner')
gen_contour_region_xld (RegionBorder, Contours, 'border')
fit_circle_contour_xld (Contours, 'algebraic', -1, 0, 0, 3, 2, Row, Column, Radius, StartPhi, EndPhi, PointOrder)
*显示外环中心点
dev_set_colored (3)
dev_set_color ('red')
gen_cross_contour_xld (CrossOuter, Row, Column, 20, 0)

*选取内环
reduce_domain (GrayImage, SelectedRegions, ImageReduced)
threshold (ImageReduced, Region1, 180, 255)
opening_circle (Region1, RegionOpening, 7.5)
connection (RegionOpening, ConnectedRegions1)
select_shape (ConnectedRegions1, SelectedRegions1, 'circularity', 'and', 0.6, 1)
boundary (SelectedRegions1, RegionBorder1, 'inner')
gen_contour_region_xld (RegionBorder1, Contours1, 'border')
fit_circle_contour_xld (Contours1, 'algebraic', -1, 0, 0, 3, 2, Row1, Column1, Radius1, StartPhi1, EndPhi1, PointOrder1)
*显示内环中心点
dev_set_color ('green')
gen_cross_contour_xld (CrossInner, Row1, Column1, 20, 0)

*先判断内环和外环的中心是否在同一坐标点，创建仿射变换矩阵进行平移操作
if(Row!=Row1 and Column!=Column1)
    hom_mat2d_identity (HomMat2DIdentity)
    vector_angle_to_rigid (Row, Column, 0, Row1, Column1, 0, HomMat2D)
    affine_trans_contour_xld (Contours, ContoursAffineTrans, HomMat2D)
    area_center_xld (ContoursAffineTrans, Area, Row2, Column2, PointOrder2)
    gen_cross_contour_xld (Cross, Row2, Column2, 20, 45)   
endif


MeasureCPRow:=Row1
MeasureCPCol:=Column1
*以内环的中心点为测量中心分别计算中心点到内环的距离和到仿射后的外环的距离
distance_pc (Contours1, MeasureCPRow, MeasureCPCol, DistanceMin, DistanceMax)
distance_pc (ContoursAffineTrans, MeasureCPRow, MeasureCPCol, DistanceMin1, DistanceMax1)

DistanceOuter2InnerMean:=(DistanceMin1+DistanceMax1)/2-(DistanceMin+DistanceMax)/2

*显示测量箭头
gen_region_line (RegionLines, MeasureCPRow, MeasureCPCol, MeasureCPRow, MeasureCPCol+Width/2)
intersection_line_contour_xld (Contours1, MeasureCPRow, MeasureCPCol, MeasureCPRow, MeasureCPCol+Width/2, CrossInnerRow, CrossInnerCol, IsOverlapping)
intersection_line_contour_xld (Contours, MeasureCPRow, MeasureCPCol, MeasureCPRow, MeasureCPCol+Width/2, CrossOuterRow, CrossOuterCol, IsOverlapping)

gen_arrow_contour_xld (Arrow, CrossInnerRow, CrossInnerCol, CrossOuterRow, CrossOuterCol, 5, 20)
dev_display (inImage)
dev_display (Arrow)
Text:='内环到外环的平均距离为：'
dev_disp_text (Text+DistanceOuter2InnerMean, 'window', 257, 186, 'black', [], [])

##原图
在这里插入图片描述
##结果图