Invisible barcode with optimized error correction

The demands to connect between paper media and digital worlds are increasing, and an "electronic clipping system", which overprints an invisible barcode into analog media, is an example of connecting these worlds. However, depending on the combination of the target paper media, the ink used in the media, and the invisible ink, we cannot always correctly decode the information. In this paper, we introduce a new 2D barcode encoding and decoding method which overcomes such problems. In our method, we divide the 2D code data area into several blocks, and do not use for encoding the blocks where many of the bits in the block have high probabilities of bit errors. The decoder determines the skipped blocks from the image itself. The experimental results proved that our method greatly improved the probability of correct information decoding for the invisible barcode.