https://blog.csdn.net/libaineu2004/article/details/102828588
本篇记录halcon图像image、区域region和轮廓xld的相互转换
一、xld转region
方法1：
gen_region_contour_xld (SelectedXLD, RegionXLD, 'filled')
方法2：
*UnionContours1为轮廓
sort_contours_xld (UnionContours1, SortedContours, 'upper_left', 'true', 'column')
count_obj (UnionContours1, Number)
*将轮廓转换成区域
gen_empty_obj (Line)
for i := 1 to Number by 1
select_obj (SortedContours, ObjectSelected, i)
get_contour_xld (ObjectSelected, Row, Col)
gen_region_polygon (Region, Row, Col)
concat_obj (Line, Region, Line)
endfor
二、region转xld
方法1：gen_contour_region_xld (SelectedRegions, Contours, 'border')
拟合部分边缘提取和轮廓分割之间会用到，因为轮廓分割需输入xld轮廓，而用boundary提取区域边缘输出的是区域（region），所以需要转换。
方法2：先将区域转换骨架，然后再提取骨架轮廓
skeleton (Region2, Skeleton2)
gen_contours_skeleton_xld (Skeleton2, Contours, 1, 'filter')
三、xld/region转换成image
方法1：
*Halcon感兴趣区域填充特定颜色
color24 := [255,0,0]
color8 := 255
gen_region_contour_xld (UnionContoursCircles, Region1, 'filled')
region_to_bin(Region, Binary, 0, 255, Width, Height)
overpaint_region (Binary, Region1, color8, 'fill')
write_image (Binary, 'bmp', 0, 'E:/Org.bmp')
方法2：
*创建空白图像，将得到的区域贴到上面
get_image_size (ImageReduced, Width1, Height1)
gen_image_proto (ImageReduced, ImageCleared, 128)
paint_region (Region, ImageCleared, ImageResult1, 255, 'fill')
方法3：（推荐）xld->region->image
*无效set_system ('init_new_image', 'false')
gen_region_contour_xld (ObjectSelected, Region, 'filled')
gen_image_const (NewImage, 'byte', Width, Height)
*Create an image with a specified constant gray value
gen_image_proto (NewImage, ImageCleared1, 255)
*Paint regions into an image
paint_region (Region, ImageCleared1, ImageResult, 0, 'fill')
write_image (ImageResult, 'jpeg', 0, 'D:/1111.jpg')
*Overpaint regions in an image
gen_image_proto (NewImage, ImageCleared2, 255)
overpaint_region(ImageCleared2, Region, 0, 'fill')
结论：paint_region 和overpaint_region最终的输出结果是一样的
四、从image裁剪需要的区域，成为新的image
read_image(Image,'monkey')
gen_rectangle1 (ROI_0, 588.03, 468.95, 2328.43, 3212.37)
reduce_domain (Image, ROI_0, ImageReduced)
crop_domain(ImageReduced, ImagePart)
write_image(ImagePart, 'bmp', 0, 'e:/1.bmp')
五、从image获得region
binary_threshold (Image, Region, 'smooth_histo', 'dark', UsedThreshold)
mean_image (Image, ImageMean, 12, 12)
dyn_threshold (Image, ImageMean, Region, 30, 'dark')
https://blog.csdn.net/libaineu2004/article/details/102828588