1 .\" RCSid "$Id: normpat.1,v 1.2 2003/12/09 15:59:06 greg Exp $"

     2 .TH NORMPAT 1 11/15/93 RADIANCE

     3 .SH NAME

     4 normpat - normalize RADIANCE pictures for use as patterns.

     5 .SH SYNOPSIS

     6 .B normpat

     7 [

     8 .B \-v

     9 ][

    10 .B \-b

    11 ][

    12 .B \-f

    13 ][

    14 .B "\-r maxres"

    15 ]

    16 .B "picture .."

    17 .SH DESCRIPTION

    18 .I Normpat

    19 normalizes one or more RADIANCE pictures to an average brightness of 1.0

    20 and optionally removes fundamental frequencies and blends the edges

    21 of the image.

    22 The original images are overwritten during this process, and it is

    23 recommended that the program work on copies of the pictures for this reason.

    24 .PP

    25 The

    26 .I \-r

    27 option can be used to set the maximum horizontal or vertical resolution

    28 of the final result, which should not be greater than 256 for most

    29 patterns (due to the associated memory burden during rendering).

    30 The

    31 .I \-f

    32 option uses a Fourier transform to remove the lowest frequencies

    33 from the image, reducing the noticeability of pattern repitition.

    34 The

    35 .I \-b

    36 option can be used to blend the edges of the image so that when

    37 it is tiled, the seams are less apparent.

    38 The

    39 .I \-v

    40 option turns on the verbose flag, which prints on the standard output

    41 progress messages as the script runs.

    42 .PP

    43 .I Normpat

    44 is a shell script that makes calls to other RADIANCE programs

    45 that do the actual work.

    46 .SH AUTHOR

    47 Greg Ward

    48 .SH "SEE ALSO"

    49 getinfo(1), pcomb(1), pcompos(1), pfilt(1), pflip(1), protate(1),

    50 psign(1), ra_bn(1), ra_pr(1), ra_t8(1), ra_t16(1), rpict(1)