halconpolar_trans_image_ext将图像中的圆弧变换为极坐标>圆环拉成直线

在HDevelop中

表盘.jpg

dev_update_off()
read_image(Image,'D:/bb/tu/表盘.jpg')
get_image_size (Image, Width, Height)

dev_open_window(0,0,Width,Height,'black',WindowHandle)
disp_obj (Image, WindowHandle)

******获取表盘中心坐标、获取表盘图像********
draw_circle (WindowHandle, Row, Column, Radius)
gen_circle (Circle, Row, Column, Radius)
reduce_domain (Image, Circle, ImageReduced)
******************************************

polar_trans_image_ext (ImageReduced, PolarTransImage, Row, Column, 0, 6.28319, 0, Radius, 2*3.1415*Radius, Radius, 'nearest_neighbor')
*将图像中的圆弧变换为极坐标-->圆环拉成直线
*参数1：输入图像
*参数2：输出图像
*参数3：圆弧中心的行坐标-y
*参数4：圆弧中心的列坐标-x
*参数5:起始弧度，默认值：0.0；【0弧度对应表盘的3点，顺时针为正】
*参数6：结束弧度
*参数7：极坐标开始的极长，一般是0
*参数8：极坐标结束的极长，一般是圆半径r
*参数9：图片宽，一般2πr
*参数10：图片高【r】
*参数11：插值，值列表：'bilinear', 'nearest_neighbor'

dev_open_window(0,0,2*3.1415*Radius,Radius,'black',WindowHandle1)
disp_obj (PolarTransImage, WindowHandle1)

在QtCreator中

    HObject  ho_Image, ho_Circle, ho_ImageReduced;
    HObject  ho_PolarTransImage;
    HTuple  hv_Width, hv_Height, hv_WindowHandle;
    HTuple  hv_Row, hv_Column, hv_Radius, hv_WindowHandle1;

    ReadImage(&ho_Image, //'D:/bb/tu/表盘.jpg'
         "D:/bb/tu/\350\241\250\347\233\230.jpg");
     GetImageSize(ho_Image, &hv_Width, &hv_Height);

     SetWindowAttr("background_color","black");
     OpenWindow(0,0,hv_Width,hv_Height,0,"visible","",&hv_WindowHandle);
     HDevWindowStack::Push(hv_WindowHandle);
     DispObj(ho_Image, hv_WindowHandle);

     //*****获取表盘中心坐标、获取表盘图像********
     DrawCircle(hv_WindowHandle, &hv_Row, &hv_Column, &hv_Radius);
     GenCircle(&ho_Circle, hv_Row, hv_Column, hv_Radius);
     ReduceDomain(ho_Image, ho_Circle, &ho_ImageReduced);
     //*****************************************

     PolarTransImageExt(ho_ImageReduced, &ho_PolarTransImage, hv_Row, hv_Column, 0,
         6.28319, 0, hv_Radius, (2*3.1415)*hv_Radius, hv_Radius, "nearest_neighbor");
     //将图像中的圆弧变换为极坐标-->圆环拉成直线
     //参数1：输入图像
     //参数2：输出图像
     //参数3：圆弧中心的行坐标-y
     //参数4：圆弧中心的列坐标-x
     //参数5:起始弧度，默认值：0.0；【0弧度对应表盘的3点，顺时针为正】
     //参数6：结束弧度
     //参数7：极坐标开始的极长，一般是0
     //参数8：极坐标结束的极长，一般是圆半径r
     //参数9：图片宽，一般2πr
     //参数10：图片高【r】
     //参数11：插值，值列表：'bilinear', 'nearest_neighbor'

     SetWindowAttr("background_color","black");
     OpenWindow(0,0,(2*3.1415)*hv_Radius,hv_Radius,0,"visible","",&hv_WindowHandle1);
     HDevWindowStack::Push(hv_WindowHandle1);
     DispObj(ho_PolarTransImage, hv_WindowHandle1);