Figure 9. (Color online) Sample symbol showing one additional dot (dark blue dot) and one erasure (red dot) within the first codeword. The use of red dots was because it was determined the scanners filtered out red, which resulted in the red dots appearing as white to the scanners while allowing the researcher to still see the deleted dot

From

DotCode Damage Testing

Kevin Berisso

Journal of Computer Sciences and Applications. 2018, 6(1), 43-47 doi:10.12691/jcsa-6-1-6