“A Pixel is Not A Little
Square”
–What I am about to say is so fundamental that I wish I could shout it from the treetops
and have people
remember! A pixel is a point sample—that is, the value of a continuous thing at
a single point
(with zero dimensions). If only this were understood, we might be able to rid the
world forever
of the misconception that a pixel is a little square. Alvy Ray Smith [Smith 1975]
–More on this
later when we discuss “zooming
into” (i.e., scaling) images