What sort of background do you expect the barcode to be placed on?
If the patterns outside the barcode is not striped, or checkered, you can use the edge finder to determine an area in the image where the image have a lot of parallel white/black transitions
The result is alot of infinitle lines, that gives you approximately where the edges of the barcode is (width) and angle.
and if you then sample some of those lines you should be able to find the height., and tada a ROI rectangle + angle.
then for robustness increase the the size of that rectangle, and voila, a barcode finder tool is created.
Engineer, M.Sc. Autonomous Systems, Automation and Control of non-linear systems
Project Engineer @ R&D A/S
www.rdas.dk
