项目需求：

此项目halcon检测钢珠的个数,并显示。

素材如下：

代码如下：

read_image (Image4, '扩视4.bmp')
*********关闭窗口***********
dev_close_window ()
*********打开窗口***********
dev_open_window (0, 0, 900, 512, 'black', WindowHandle)
*********显示原图***********
dev_display (Image4)
*********设置字体大小***********
set_display_font (WindowHandle, 30, 'mono', 'true', 'false')
*********二值化***********
binary_threshold (Image4, Region, 'max_separability', 'light', UsedThreshold)
*********闭运算***********
closing_circle (Region, RegionClosing, 250.5)
*********开运算***********
opening_circle (RegionClosing, RegionOpening, 100.5)
*********测量圆的尺寸***********
smallest_circle (RegionOpening, Row, Column, Radius)
*********生成一个圆***********
gen_circle (Circle, Row, Column, Radius)
*********抠图***********
reduce_domain (Image4, Circle, ImageReduced)
*********再二值化***********
binary_threshold (ImageReduced, Region1, \
'max_separability', 'dark', UsedThreshold1)
*********开运算***********
opening_circle (Region1, RegionOpening1, 103.5)
*********断开***********
connection (RegionOpening1, ConnectedRegions)
*********变形***********
shape_trans (ConnectedRegions, RegionTrans, 'inner_circle')
dev_display (Image4)
dev_display (RegionTrans)
count_obj (RegionTrans, Number)
disp_message (WindowHandle,'个数:'+ Number, 'Image4', 100, 100, 'green', 'false')

详细视频如下：

https://www.bilibili.com/video/BV1BQ4y1R71c?p=23