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.\" RCSid "$Id" |
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.TH NORMPAT 1 11/15/93 RADIANCE |
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.SH NAME |
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normpat - normalize RADIANCE pictures for use as patterns. |
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.SH SYNOPSIS |
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.B normpat |
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[ |
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.B \-v |
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][ |
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.B \-b |
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][ |
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.B \-f |
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][ |
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.B "\-r maxres" |
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] |
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.B "picture .." |
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.SH DESCRIPTION |
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.I Normpat |
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normalizes one or more RADIANCE pictures to an average brightness of 1.0 |
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and optionally removes fundamental frequencies and blends the edges |
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of the image. |
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The original images are overwritten during this process, and it is |
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recommended that the program work on copies of the pictures for this reason. |
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.PP |
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The |
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.I \-r |
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option can be used to set the maximum horizontal or vertical resolution |
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of the final result, which should not be greater than 256 for most |
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patterns (due to the associated memory burden during rendering). |
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The |
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.I \-f |
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option uses a Fourier transform to remove the lowest frequencies |
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from the image, reducing the noticeability of pattern repitition. |
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The |
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.I \-b |
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option can be used to blend the edges of the image so that when |
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it is tiled, the seams are less apparent. |
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The |
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.I \-v |
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option turns on the verbose flag, which prints on the standard output |
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progress messages as the script runs. |
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.PP |
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.I Normpat |
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is a shell script that makes calls to other RADIANCE programs |
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that do the actual work. |
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.SH AUTHOR |
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Greg Ward |
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.SH "SEE ALSO" |
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getinfo(1), pcomb(1), pcompos(1), pfilt(1), pflip(1), protate(1), |
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psign(1), ra_bn(1), ra_pr(1), ra_t8(1), ra_t16(1), rpict(1) |
