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.\" RCSid "$Id$" |
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.TH RA_BN 1 11/15/93 RADIANCE |
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.SH NAME |
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ra_bn - convert RADIANCE picture to/from Barneyscan image |
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.SH SYNOPSIS |
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.B ra_bn |
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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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[ |
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.B output |
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] |
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.br |
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.B ra_bn |
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.B \-r |
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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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.B input |
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[ |
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.B output |
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] |
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.SH DESCRIPTION |
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.I Ra_bn |
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converts between RADIANCE and Barneyscan native RGB image files. |
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Since Barneyscan images are stored in three files, one for each |
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color component, only the root file name is given and the program |
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appends the suffixes "red", "grn" and "blu". |
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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 2.0. |
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An exponent of 1.0 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 Barneyscan image |
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to a RADIANCE picture. |
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.SH AUTHORS |
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Greg Ward |
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.SH "SEE ALSO" |
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pfilt(1), ra_ppm(1), ra_pr(1), ra_pr24(1), ra_t8(1), ra_t16(1), |
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ra_tiff(1), ximage(1) |
