Question

我需要将黑色图像转换为灰度图像。我的代码将彩色图像转换为灰度图像。但不会转换为黑色图像到灰度图像。甚至尝试从stackoverflow中的一个样本灰度转换。也不适用于黑色到灰度图像转换。该链接为https://stackoverflow.com/a/2265990/8569792

public void GreyScaleConversion()
{          
    //read image
     Bitmap bmp = global::Ribbon.Properties.Resources.Device;

     //load original image in picturebox1
     pictureBox1.Image = global::Ribbon.Properties.Resources.Device;

     //get image dimension
     int width = bmp.Width;
     int height = bmp.Height;

     //color of pixel
     Color p;

     //grayscale
     for (int y = 0; y < height; y++)
     {
         for (int x = 0; x < width; x++)
         {
             //get pixel value
             p = bmp.GetPixel(x, y);

             //extract pixel component ARGB
             int a = p.A;
             int r = p.R;
             int g = p.G;
             int b = p.B;

             //find average
             int avg = (r + g + b) / 3;

             //set new pixel value
             bmp.SetPixel(x, y, Color.FromArgb(a, avg, avg, avg));
         }
     }

     //load grayscale image in picturebox2
     pictureBox2.Image = bmp;
}

Answer 1

    public void GreyScaleConversion()
    {
        //read image
        Bitmap bmp = global::Ribbon.Properties.Resources.Device;

        //load original image in picturebox1
        pictureBox1.Image = global::Ribbon.Properties.Resources.Device;

        //get image dimension
        int width = bmp.Width;
        int height = bmp.Height;

        //color of pixel
        Color p;

        //grayscale
        for (int y = 0; y < height; y++)
        {
            for (int x = 0; x < width; x++)
            {
                //get pixel value
                p = bmp.GetPixel(x, y);

                //extract pixel component A
                int a = p.A;

                //set new pixel value
                bmp.SetPixel(x, y, Color.FromArgb(a, 155, 155, 155));
            }
        }

        //load grayscale image in picturebox2
        pictureBox2.Image = bmp;
    }

黑色图像转换为灰度图像

1 个答案: