Barcode reader

Hi everyone, I need a small program that will read barcodes from an image (you can use the images at: [login to view URL] as a sample - or search for other barcodes on the site). The returned value should be the barcode value (in the example above, the value 786162120328 should be returned). There are a LOT of programs out there to do exactly this, but I need one that is ported to MAC OS and can be run and compiled in Xcode. There are a lot on [login to view URL], but I think there are others as well. So this project is more of a port than an original development. All questions are welcome! Thank you, Brett