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A comment on Dry erase board lined with IR sensors to record pen strokes [video]. Parent comment

Re:Dry erase board lined with IR sensors to record pen strok... by raldi on Friday September 11, 2015 @03:55PM (#10205821)
And the erasers were circular, so that their rotation wasn't significant and didn't need to be known by the software.
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Re:Dry erase board lined with IR sensors to record pen strok... by jwcacces on Friday September 11, 2015 @04:13PM (#10205908)
Yes!
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