How to Convert 'System.Drawing.Image' to 'System.Drawing.Bitmap'?

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Hi, i have a problem regarding:
Cannot implicitly convert type 'System.Drawing.Image' to 'System.Drawing.Bitmap'. An explicit conversion exists (are you missing a cast?)

On the line : Bitmap imagestream = GrayScale(Img);

C#

public Image GrayScale(Image Img)
{
    Stream imageStream = new MemoryStream();
    using (Bitmap bmp = new Bitmap(Img))
    {
        int rgb;
        Color c;

        for (int y = 0; y < bmp.Height; y++)
            for (int x = 0; x < bmp.Width; x++)
            {
                c = bmp.GetPixel(x, y);
                rgb = (int)((c.R + c.G + c.B) / 3);
                bmp.SetPixel(x, y, Color.FromArgb(rgb, rgb, rgb));
            }
        bmp.Save(imageStream, ImageFormat.Jpeg);
    }
    return Image.FromStream(imageStream);
}

private void button2_Click(object sender, EventArgs e)
{
    Image Img = Image.FromFile("C:\\Users\\L31101\\Desktop\\19.male.happy.normalized.jpg");

    Bitmap imagestream = GrayScale(Img);
}

Anyone knows how to solve this?

Posted 30-Jun-14 23:18pm

Dango123

Updated 30-Jun-14 23:29pm

Thomas Daniels

v2

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Comments

johannesnestler 1-Jul-14 5:46am

Image is a abstract class while Bitmap is a concrete implementation, so just create a new Bitmap and initialize with image data like ProgramFOX showed you

2 solutions

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Thomas Daniels · Accepted Answer · 2014-06-30T23:34:00

Solution 1

Try this:

C#

Bitmap imagestream = new Bitmap(GrayScale(Img));

Posted 30-Jun-14 23:34pm

Thomas Daniels

v2

CB Sharma · Accepted Answer · 2014-06-30T23:45:00

Solution 2

Hello

Try one one of the below

Bitmap oBitmap = new Bitmap(GrayScale(Img));

OR

Bitmap oBitmap = (Bitmap) GrayScale(Img);

OR

Image oImage = GrayScale(Img);

Bitmap oBitmap = oImage as Bitmap;

Posted 30-Jun-14 23:45pm

CB Sharma