Image Processing PPC

[Guest]

I have an C# PPC app and am experiencing extream lag time when manipulating
pixel values in an Image object. Is there a way to make the GetPixel /
SetPixel operation faster ?

my image is 144x256 pixel and takes about 3 minutes to simply invert the
colors using the following code:

**********************************************************
if (chkInvert.Checked)
{
Color tmpclr, newClr;
int r, g, b;
Bitmap img2Invert = new Bitmap(pictureBox1.Image);

//loop through the image and invert each pixel
for (int iy = 0; iy < img2Invert.Height; iy++)
for (int ix = 0; ix < img2Invert.Width; ix++)
{
tmpclr = img2Invert.GetPixel(ix, iy);
r = 255 - tmpclr.R;
g = 255 - tmpclr.G;
b = 255 - tmpclr.B;
newClr = Color.FromArgb(r, g, b);
img2Invert.SetPixel(ix, iy, newClr);

}

pictureBox1.Image = img2Invert;
}

************************************************************

Help with this would be much appreciated.

 

[Ilya Tumanov [MS]]

No, there's no way to make Get/SetPixel faster. Please use LockBits and
access bitmap data directly instead (NETCF V2 only).


--
Best regards,

Ilya

This posting is provided "AS IS" with no warranties, and confers no rights.

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[Guest]

Thanks! I appriciate the help...^_^

If you could provide an example of LockBits it would be great -- meanwhile
I'll query msdn for it. :]

~Digiwizard~