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.\" RCSid "$Id: ra_pr24.1,v 1.3 2004/03/26 22:58:20 greg Exp $" |
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.TH RA_PR24 1 11/15/93 RADIANCE |
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.SH NAME |
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ra_pr24 - convert RADIANCE picture to/from 24-bit rasterfile |
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.SH SYNOPSIS |
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.B ra_pr24 |
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[ |
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.B \-r |
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| |
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.B \-rgb |
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][ |
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.B "\-g gamma" |
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][ |
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.B "\-e +/-stops" |
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] |
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[ |
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.B input |
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[ |
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.B output |
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] |
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] |
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.SH DESCRIPTION |
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.I Ra_pr24 |
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converts between RADIANCE and 24-bit pixrect rasterfile formats. |
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The |
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.I \-g |
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option specifies the exponent used in gamma correction; |
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the default value is 2.2. |
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An exponent of 1 turns gamma correction off. |
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The |
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.I \-e |
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option specifies an exposure compensation in f-stops (powers of two). |
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Only integer stops are allowed, for efficiency. |
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The |
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.I \-r |
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option invokes a reverse conversion, from a 24-bit rasterfile to |
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a RADIANCE picture. |
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If the |
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.I \-rgb |
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option is used, the output rasterfile will be in RGB byte-ordering |
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rather than the more standard (for Sun) BGR ordering. |
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Byte ordering is determined automatically for the reverse |
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conversion. |
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If the output file is missing, the standard output is used. |
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If the input file is missing as well, the standard input is used. |
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.SH AUTHOR |
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Greg Ward |
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.SH BUGS |
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Only standard 24-bit color rasterfiles are read or written. |
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.SH "SEE ALSO" |
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pfilt(1), ra_bmp(1), ra_bn(1), ra_ppm(1), ra_pr(1), ra_t8(1), ra_t16(1), |
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ra_tiff(1), ximage(1) |
