Patent ID: 8267321

Claim:
A method comprising the steps of: accessing a two-dimensional enhanced-density barcode to be decoded, wherein a first two-dimensional barcode and a second two-dimensional barcode are combined by overlaying and encoded in said two-dimensional enhanced-density barcode, the two-dimensional enhanced-density barcode including a set of blocks, each block including a predefined number of sub-pixels, the blocks of the two-dimensional enhanced-density barcode being arranged relative to each other in a geometrical lattice, and the lattice having a first and a second lattice direction; distorting the two-dimensional enhanced-density barcode in the first lattice direction, resulting in a first distorted two-dimensional barcode; distorting the two-dimensional enhanced-density barcode in the second lattice direction, resulting in a second two-dimensional distorted barcode; reconstructing the first two-dimensional barcode by low-pass filtering the first two-dimensional distorted barcode; and reconstructing the second two-dimensional barcode by low-pass filtering the second two-dimensional distorted barcode thereby producing two decoded two-dimensional barcodes corresponding to said first two-dimensional barcode and said second two-dimensional barcode encoded in said two-dimensional enhanced-density barcode.