如何在 emgu-cv c# 中将掩码设置为 GrabCut 方法？

Question

我正在尝试在 emgu cv 中使用 GrabCut 方法

这是我的代码

 Matrix<double> bg = new Matrix<double>(1, 65);

        bg.SetZero();



        Matrix<double> fg = new Matrix<double>(1, 65);
        fg.SetZero();


        Image<Gray, byte> mask =  new Image<Gray, byte>(img.Size);


        Rectangle rect = new Rectangle(img.Cols / 4, 0, (int)((double)img.Width / (0.75)), img.Height );


        CvInvoke.GrabCut(img, mask, rect,
           bg, fg, 5, Emgu.CV.CvEnum.GrabcutInitType.InitWithRect);


        for (int x = 0; x < mask.Cols; x++)
        {
            for (int y = 0; y < mask.Rows; y++)
            {
                if (mask[y, x].Intensity == new Gray(1).Intensity || mask[y, x].Intensity == new Gray(3).Intensity)
                {
                    mask[y, x] = new Gray(1);
                }
                else
                {
                    mask[y, x] = new Gray(0);
                }
            }

        }

        img = img.Mul(mask.Convert<Bgr,byte>());




        imageBox3.Image = img;

我的头像：

结果：

但我想要这件 T 恤，所以我尝试使用这个面具（我在 photoshop 中制作）

面具：

我更改了掩码，所以我的代码变成了这样：

 Matrix<double> bg = new Matrix<double>(1, 65);

        bg.SetZero();



        Matrix<double> fg = new Matrix<double>(1, 65);
        fg.SetZero();


        Image<Gray, byte> mask =  new Image<Gray, byte>(@"C:\Users\iP\Desktop\exaples\mas.jpg");

        //here i set the only white pixels (foreground object ) to 1 and 0 for else
        for (int x = 0; x < mask.Cols; x++)
        {
            for (int y = 0; y < mask.Rows; y++)
            {
                if (mask[y, x].Intensity > new Gray(200).Intensity)
                {
                    mask[y, x] = new Gray(1);
                }
                else
                {
                    mask[y, x] = new Gray(0);
                }
            }
        }


        Rectangle rect = new Rectangle(img.Cols / 4, 0, (int)((double)img.Width / (0.75)), img.Height );


        CvInvoke.GrabCut(img, mask, rect,
           bg, fg, 5, Emgu.CV.CvEnum.GrabcutInitType.InitWithRect);


        for (int x = 0; x < mask.Cols; x++)
        {
            for (int y = 0; y < mask.Rows; y++)
            {
                if (mask[y, x].Intensity == new Gray(1).Intensity || mask[y, x].Intensity == new Gray(3).Intensity)
                {
                    mask[y, x] = new Gray(1);
                }
                else
                {
                    mask[y, x] = new Gray(0);
                }
            }

        }

        img = img.Mul(mask.Convert<Bgr,byte>());




        CvInvoke.Imshow("result", img);

但我用第一个面具（没有 T 恤）得到了相同的结果

我的代码哪里出错了？？

并且我尝试将 Emgu.CV.CvEnum.GrabcutInitType.InitWithRect 更改为
Emgu.CV.CvEnum.GrabcutInitType.InitWithMask

我明白了

Answer 1

这段代码现在可以使用了:)

Matrix<double> bg = new Matrix<double>(1, 65);

        bg.SetZero();



        Matrix<double> fg = new Matrix<double>(1, 65);
        fg.SetZero();


        Image<Gray, byte> mask = new Image<Gray, byte>(img.Size);


        Rectangle rect = new Rectangle(img.Cols / 4, 0, (int)((double)img.Width / (0.75)), img.Height );


        CvInvoke.GrabCut(img, mask, rect,
           bg, fg, 5, Emgu.CV.CvEnum.GrabcutInitType.InitWithRect);


        Image<Gray, byte> mask2 = new Image<Gray, byte>(@"C:\Users\iP\Desktop\exaples\mas.jpg");

        ////here i set the only white pixels (foreground object ) to 1 and 0 for else
        for (int x = 0; x < mask.Cols; x++)
        {
            for (int y = 0; y < mask.Rows; y++)
            {
                if (mask2[y, x].Intensity > new Gray(200).Intensity)
                {
                    mask[y, x] = new Gray(1);
                }
                else
                {

                }
            }
        }

        CvInvoke.GrabCut(img, mask, rect,
             bg, fg, 5, Emgu.CV.CvEnum.GrabcutInitType.InitWithMask);


        for (int x = 0; x < mask.Cols; x++)
        {
            for (int y = 0; y < mask.Rows; y++)
            {
                if (mask[y, x].Intensity == new Gray(1).Intensity || mask[y, x].Intensity == new Gray(3).Intensity)
                {
                    mask[y, x] = new Gray(1);
                }
                else
                {
                    mask[y, x] = new Gray(0);
                }
            }

        }

        img = img.Mul(mask.Convert<Bgr,byte>());




        CvInvoke.Imshow("result", img);

结果：

视频：https://www.youtube.com/watch?v=463TMas4vHU

如何在 emgu-cv c# 中将掩码设置为 GrabCut 方法？

how to set mask to GrabCut method in emgu-cv c#?

c#

opencv

image-processing

emgucv