{HEAD ~ A method} of reading and decoding scrambled and encoded two dimensional data represented on a sheet of {TAIL ~ media} as a dot matrix includes the step of detecting a data area on the sheet of media by detecting targets on the sheet of media 
{ HEAD ~ A method } of reading and decoding scrambled and encoded two dimensional data represented on a sheet of { TAIL ~ media } as a dot matrix includes the step of detecting a data area on the sheet of media by detecting targets on the sheet of media
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