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gipfel 0.2.6 (Default branch)
01-26-2009
gipfel is a tool to find the names of mountains or points of interest on a picture. It uses a database containing names and GPS data. With the given viewpoint (the point from which the picture was taken) and two known mountains on the picture, it can compute all parameters needed to compute the positions of other mountains on the picture. gipfel can also generate (stitch) panorama images. License: GNU General Public License (GPL) Changes:|
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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)