
Resolution 7
An electrical engineer may call
this simply
frequency response.
The qualifier
magnitude
distin-
guishes it from other functions
of frequency such as phase
frequency response.
To avoid visible pixel structure in image display,
some
overlap is necessary in the distributions of light
produced by neighboring display elements, as
I explained in
Image structure,
on page 43. Also, to
avoid spatial aliasing in image capture, some overlap is
necessary in the distribution of sensitivity across neigh-
boring sensor elements. Such overlap reduces sharp-
ness. In this chapter, I will explain