Prof. Ismael H. F. Santos
-ismael@tecgraf.puc-rio.br2
This is a
demonstration of a spatial phenomenon, caused by the fact that we have
relatively few S cones in our retina.In turn, this means that S cones alias signals that have high spatial
frequency.The most obvious signs of
this are that narrow blue stripes look green (and blue text is notoriously
hard to read).Look at the sets of
stripes in the next three slides --- do the narrow ones look greener?
