reading a barcode with a webcam

Question

Hey,
I\'m trying to read a EAN-13 barcode from my webcam.
I already wrote a class to do that work.
I\'m taking a picture from my webcam, trimming it to show ONLY the

Answer 1

I see two problems:

1) You only scan the top most pixel row of your image (see the second parameter of GetPixel). Your barcode is probably in the middle of the image and not at the top.

Color c = bb.GetPixel((int)Math.Round(i,0), 0);

2) Instead of the green component, you take the alpha component to convert the colored pixel into a binary value. Since the alpha component is probably always 255, you always get 0 unless you have a very dark pixel.

if (c.A + c.B + c.R > 128 * 3)