Masked Pixel Checksum

[bahkoo]

I would like to create a function that works much like the GetPixelChecksum with one important difference: to perform the checksum only on pixels that match the specified color.

For example, I am trying to get the checksum on character and digit images that are always a single color but appear on various textured backgrounds. I want to get a checksum for a rectangle containing that character or digit, (which is a single color) ignoring all other colors that appear in that rectangle (because these are part of the background). The result will be that I can compare these characters regardless of the background they appear on (unless the background happens to contain a pixel of the same color).

To now, I have created a nested loop to loop through each pixel in a given rectangle, get each pixel and check if is the required color. Once found though, I don't know what to do with the result in order to create a unique checksum.

Getting each pixel individually like this does seem quite slow compared to the GetPixelChecksum. Anyone have ideas for optimizing the speed?

Also, how can I create a checksum based off all the (x,y) coordinates that succesfully match the criteria?

Thanks

[SmOke_N]

The request has been asked before, and been said that it would be too difficult to impliment. And the alternatives, because with the current implementation you can't do a PixleCheckSum by specific color, are going to obviously be slower unless you write your own method in a lower level language.

This is one alternative and you would base your own values.

http://www.autoitscript.com/forum/index.ph...c=36013&hl=

The other suggestion would be, that most use the "specific" color to act as an OCR, try looking that up ("OCR") in the Example Scripts section of the forums.

[bahkoo]

Looks good. Thanks