Embedding grayscale halftone pictures in QR Codes using Correction Trees

7 Nov 2012Jarek Duda

Barcodes like QR Codes have made that encoded messages have entered our everyday life, what suggests to attach them a second layer of information: directly available to human receiver for informational or marketing purposes. We will discuss a general problem of using codes with chosen statistical constrains, for example reproducing given grayscale picture using halftone technique... (read more)

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