8.8

Pattern sizes
The absolute minimum required for an Anoto Digital Pen to read the pattern and know it's
position on the page is 7mm (1/4"). Any pattern smaller than this will not be readable. However,
at 7mm width and height, the pen can only recognize a single dot within that pattern, at the top
of the field.
This is because the pen's camera (which captures the position of the pen)is located under the
pen tip and must fully see the pattern. The following image illustrates how the pen reads its
position:
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