Legacy ImageMagick Discussions Archive

Thanks, I'll try that.

If your scanned images are different sizes, then one barcode reference image will not always match well with the scanned image. Matching like that is not scale invariant. However, using a cross for a marker, will generally do better, though even that will not be totally scale invariant. Such ...

If forms have different barcodes, finding them is a messy problem. It's much easier to find something that is invariant between the forms. You can also use registration marks to detect whether, for example, a scanned form is inverted. Well, there's one barcode in the lower left which never changes ...

Those distorts look like they would do the trick, but I'm not sure how I would get the coordinates for the corners. Is there a way to, for example, find a barcode in a general area, and then get the corner point from that? That seems to be the major difficulty. Thanks, Blobby Edit: Hadn't seen the ...

Hi: I am using ImageMagick to clean up scanned black and white tiffs before passing them to our OMR (bubble mark reader) software. The problem with our forms is that they are printed out by users (from pdfs), and they come back all at slightly differnt scales, which confuses the OMR software ...