Josh StarnesHere I tested the 400 line wide QR code I stretched by hand and the 600 line QR code I custom made. The distance tested here was 7 ft 6 inches exactly with a 1 watt led illuminator 6400k color. This flavor of light favors blue. I used this because I am considering IR illuminator to ensure the QR codes are well lit at this distance.
https://www.youtube.com/watch?v=SfzHZibYt0Q&feature=youtube_gdata_player
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