How do DataGlyphs resist noise?
A. DataGlyphs are particularly good at resisting salt and pepper noise, which is a very common type of damage. Salt and pepper noise is characterized by “flipped pixels” and can be caused by imperfections in the printing process, imaging device, or environmental wear and tear. Many 2D barcodes are composed of arrays of on-or-off dots, which can be hard to distinguish from similarly looking noise patterns. DataGlyphs transmit information through angles, which are relatively easy to distinguish even in the presence of common types of noise. For example, our decoding software (and hopefully your eyes as well) can distinguish the angle of all but 8 of the data bearing glyphmarks in this image. The small number of missing or erroneously read glyphmarks are easily compensated for with error correction coding. In many respects, this is analogous to the situation with AM and FM radio. In AM radio, both the noise and the signal are modulations in the amplitude. FM radio (like DataGlyphs) is mor
