How to read a 8-bit grayscale JPEG image using C#?i need this code

Should OP choose to clarify it, we will be able to right a real thing for sure :-)
--SA

From the OP:

I want to read only grey pixel (8-bit)
and maybe you understand from this code :

Bitmap img1 = new Bitmap(fname1);
pictureBox1.Image = img1;
int[] myarray;
myarray = new int[256];

for (int i = 0; i< img1.Width; i++)
{
for (int j = 0; j< img1.Height; j++)
{
Color PixelColor = img1.GetPixel(i, j); (1)
int gray = (PixelColor.R + PixelColor.G + PixelColor.B) / 3; (2)


//gray = gray + 1;
myarray[gray] = myarray[gray] + 1;

}
}
in step one: i read the colored pixel by (getpixel)
in step two :i transfered the coloured pixel to grey pixel
i want to dispense on step two , and thet by getting method similarity the work of (getpixel)
but the pixel must be from the type of : bitmap and not from the type of color


and thanks for your help !

First, do NOT use GetPixel. It's way too slow for this.

You can find an example ofa Grayscale Filter in C# at http://www.codeproject.com/KB/GDI-plus/csharpgraphicfilters11.aspx