halcon-实例：根据颜色提取想要的对象

 

 实例目的：提取最上面黄色的线

在HDevelop中

dev_close_window () read_image (Image, 'D:/bb/tu/8.png') get_image_size (Image, Width, Height) decompose3 (Image, Red, Green, Blue)          *将RGB三通道数据转化为HSV色彩空间的三通道图像数据     *HSV：看https://blog.csdn.net/xiaoyafang123/article/details/113029596     trans_from_rgb (Red, Green, Blue, Hue, Saturation, Intensity, 'hsv')          对HSV图像中的饱和度通道进行阈值操作     threshold (Saturation, HighSaturation, 200, 255)          *获取上述阈值操作后区域中的色调通道图像数据     reduce_domain (Hue, HighSaturation, HueHighSaturation)          *对上述色调通道图像数据进行阈值处理     threshold (HueHighSaturation, Yellow, 20, 30)          *寻找连通域     connection (Yellow, ConnectedRegions)          *保留ConnectedRegions里的最大的区域     select_shape_std (ConnectedRegions, SelectedRegions, 'max_area', 0)          *对SelectedRegions进行闭运算操作     closing_circle (SelectedRegions, Yellow, 3.5)          *将Yellow区域里的图像剪切出来     reduce_domain (Image, Yellow, ImageReduced)               dev_open_window(10,10,Width, Height,'black',WindowHandle)     dev_display(ImageReduced)           

 

 

在Qt Creator中

  HObject  ho_Image, ho_Red, ho_Green, ho_Blue;   HObject  ho_Hue, ho_Saturation, ho_Intensity, ho_HighSaturation;   HObject  ho_HueHighSaturation, ho_Yellow, ho_ConnectedRegions;   HObject  ho_SelectedRegions, ho_ImageReduced;   HTuple  hv_Width, hv_Height, hv_WindowHandle;

 

  ReadImage(&ho_Image, D:/bb/tu/8.png);   GetImageSize(ho_Image, &hv_Width, &hv_Height);   Decompose3(ho_Image, &ho_Red, &ho_Green, &ho_Blue);    //将RGB三通道数据转化为HSV色彩空间的三通道图像数据   //HSV：看https://blog.csdn.net/xiaoyafang123/article/details/113029596   TransFromRgb(ho_Red, ho_Green, ho_Blue, &ho_Hue, &ho_Saturation, &ho_Intensity,        hsv);    //对HSV图像中的饱和度通道进行阈值操作   Threshold(ho_Saturation, &ho_HighSaturation, 200, 255);    //获取上述阈值操作后区域中的色调通道图像数据   ReduceDomain(ho_Hue, ho_HighSaturation, &ho_HueHighSaturation);    //对上述色调通道图像数据进行阈值处理   Threshold(ho_HueHighSaturation, &ho_Yellow, 20, 30);    //寻找连通域   Connection(ho_Yellow, &ho_ConnectedRegions);    //保留ConnectedRegions里的最大的区域   SelectShapeStd(ho_ConnectedRegions, &ho_SelectedRegions, max_area, 0);    //对SelectedRegions进行闭运算操作   ClosingCircle(ho_SelectedRegions, &ho_Yellow, 3.5);    //将Yellow区域里的图像剪切出来   ReduceDomain(ho_Image, ho_Yellow, &ho_ImageReduced);     SetWindowAttr(background_color,black);   OpenWindow(10,10,hv_Width,hv_Height,0,visible,,&hv_WindowHandle);   HDevWindowStack::Push(hv_WindowHandle);   if (HDevWindowStack::IsOpen())     DispObj(ho_ImageReduced, HDevWindowStack::GetActive());