Average, min and max in file with header, using awk Post: 302771538

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pextrem

PEXTREM(1)						      General Commands Manual							PEXTREM(1)

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)

RADIANCE
							     11/15/93								PEXTREM(1)

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