191923 ⎘
Methods or arrangements for sensing record carriers, e.g. for reading patterns; Details; Synchronisation of sensing process by means of additional timing marks on the record-carrier
Two-dimensional code having superior decoding properties making it possible to control the level of error correcting codes, and method for encoding and decoding the same
#2Two-dimensional code having superior decoding property which is possible to control the level of error correcting codes, and method for encoding and decoding the same
#3Two-dimensional code having superior decoding properties making it possible to control the level of error correcting codes, and a method for encoding and decoding the same
#4Covert hologram design, fabrication and optical reconstruction for security applications