lbAG">&nbsp;</A>
<H2>WHAT IS GAMMA?</H2>

<P>A good explanation of gamma is in Charles Poynton's Gamma FAQ at
<A HREF="http://www.poynton.com/GammaFAQ.html">
http://www.poynton.com/GammaFAQ.html</A> and Color FAQ at <A
HREF="http://www.poynton.com/ColorFAQ.html">
http://www.poynton.com/ColorFAQ.html</A>.

<P>In brief: The simplest way to code an image is by using sample
values that are directly proportional to the intensity of the color
components.  But that wastes the sample space because the human eye
can