halcon-hom_mat2d_scale计算缩放变换矩阵

5.jpg

 

 在HDevelop中

dev_update_off()
read_image(Image,'D:/bb/tu/5.jpg')
get_image_size (Image, Width, Height)

hom_mat2d_identity (HomMat2D)
*创建一个仿射变换矩阵
hom_mat2d_scale (HomMat2D, 0.5, 0.5, 0, 0, HomMat2DScale)
*计算缩放变换矩阵
*参数1：输入变换矩阵
*参数2：Row方向(y方向)的缩放系数
*参数3：Column方向(x方向)的缩放系数
*参数4：缩放中心的x坐标
*参数5：缩放中心的y坐标
*参数6：输出变换矩阵


affine_trans_image (Image, ImageAffineTrans, HomMat2DScale, 'constant', 'false')
*对图像应用任意仿射2D变换

dev_open_window(0,0,521,338,'black',WindowHandle)
dev_display(ImageAffineTrans)
get_image_size (ImageAffineTrans, Width1, Height1)

 

 

 

 在QtCreator中

    HObject  ho_Image, ho_ImageAffineTrans;
    HTuple  hv_Width, hv_Height, hv_HomMat2D, hv_HomMat2DScale;
    HTuple  hv_WindowHandle, hv_Width1, hv_Height1;

    ReadImage(&ho_Image, "D:/bb/tu/5.jpg");
    GetImageSize(ho_Image, &hv_Width, &hv_Height);

    HomMat2dIdentity(&hv_HomMat2D);
    //创建一个仿射变换矩阵
    HomMat2dScale(hv_HomMat2D, 0.5, 0.5, 0, 0, &hv_HomMat2DScale);
    //计算缩放变换矩阵
    //参数1：输入变换矩阵
    //参数2：Row方向(y方向)的缩放系数
    //参数3：Column方向(x方向)的缩放系数
    //参数4：缩放中心的x坐标
    //参数5：缩放中心的y坐标
    //参数6：输出变换矩阵


    AffineTransImage(ho_Image, &ho_ImageAffineTrans, hv_HomMat2DScale, "constant",
        "false");
    //对图像应用任意仿射2D变换

    SetWindowAttr("background_color","black");
    OpenWindow(0,0,521,338,0,"visible","",&hv_WindowHandle);
    HDevWindowStack::Push(hv_WindowHandle);
    if (HDevWindowStack::IsOpen())
      DispObj(ho_ImageAffineTrans, HDevWindowStack::GetActive());
    GetImageSize(ho_ImageAffineTrans, &hv_Width1, &hv_Height1);