|Letters can be made by dots at greater and greater resolution.|
We read grids every day, from needlepoint to digital fonts to football fans. The human eye will do its best to read any collection of bits as letter: even a 5 x 5 grid can express every letter of the alphabet without ambiguity; with a little awkwardness the numerals can be included; there is even leeway for a little decoration.
|The lightbulbs on the old Goodyear blimp are |
easier to read from far away than up close.
Scale is also to be understood in relation to actual size: a small, low res letter is actually easier to read than the same letter blown up big.