"Anti-aliasing works with the way that our eyes see things.
Human eyes do not see in as precise detail as we would like to
think. In reality, the mind converts the images into what it
"thinks" they are supposed to look like.
"With anti-aliasing, the curve is created with squares of color
that are shaded darker or lighter depending on how much of the
curve would take up that square. For instance, if a portion of a
curve takes up 10% of a pixel, that pixel would be shaded with 10%
of the color saturation of the curve.
"What this amounts to is that anti-aliasing adds shading along
the curve to "fool the eye" into thinking it's seeing a smooth
curve rather than a jagged bitmap."