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normpat (1)
NAME
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normpat - normalize RADIANCE pictures for use as patterns. |
SYNOPSIS
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normpat [ -v ][ -b ][ -f ][
-r maxres ] picture .. |
DESCRIPTION
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Normpat normalizes one or more RADIANCE pictures to
an average brightness of 1.0 and optionally removes
fundamental frequencies and blends the edges of the image.
The original images are overwritten during this process, and
it is recommended that the program work on copies of the
pictures for this reason. |
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The -r option can be used to set the maximum
horizontal or vertical resolution of the final result, which
should not be greater than 256 for most patterns (due to the
associated memory burden during rendering). The -f
option uses a Fourier transform to remove the lowest
frequencies from the image, reducing the noticeability of
pattern repitition. The -b option can be used to
blend the edges of the image so that when it is tiled, the
seams are less apparent. The -v option turns on the
verbose flag, which prints on the standard output progress
messages as the script runs. |
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Normpat is a shell script that makes calls to other
RADIANCE programs that do the actual work. |
AUTHOR
SEE ALSO
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getinfo(1), pcomb(1), pcompos(1), pfilt(1), pflip(1),
protate(1), psign(1), ra_bn(1), ra_pr(1), ra_t8(1),
ra_t16(1), rpict(1) |
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