NAME
pextrem - find minimum and maximum values in RADIANCE picture
SYNOPSIS
pextrem [ -o ] [ picture ]
DESCRIPTION
Pextrem locates the minimum and maximum values for the input picture,
and prints their pixel locations and color values. The first line
printed contains the x and y pixel location (x measured from the left
margin, y measured from the bottom), followed by the red, green and
blue values. The second line printed contains the same information for
the maximum value.
The -o option prints the original (radiance) values, undoing any
exposure or color correction done on the picture.
If no input picture is given, the standard input is read.
AUTHOR
Greg Ward
BUGS
The luminance value is used for comparison of pixels, although in
certain anomolous cases (ie. highly saturated colors) it is possible
that pextrem will not pick the absolute minimum or maximum luminance
value. This is because a fast integer-space comparison is used. A
more reliable floating-point comparison would be slower by an order of
magnitude.
SEE ALSO
falsecolor(1), getinfo(1), pcomb(1), pcompos(1), pextrem(1), pfilt(1),
pflip(1), protate(1), psign(1), rpict(1), ximage(1)