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ra_tiff - convert RADIANCE picture to/from a TIFF color or
greyscale image
ra_tiff [ -r ][ -b ][ -z ][ -g gamma ][ -e +/-stops ] input
output
Ra_tiff converts between RADIANCE and TIFF image formats.
The -g option specifies the exponent used in gamma
correction; the default value is 2.2, which is the
recommended value for TIFF images. The -b option can be
used to specify an 8-bit greyscale TIFF output file. The
type of input file is determined automatically. The -z
option will result in LZW compression of the TIFF output
file. Decompression is automatically determined for TIFF
input. The -e option specifies an exposure compensation in
f-stops (powers of two). Only integer stops are allowed,
for efficiency. The -r option invokes a reverse conversion,
from a TIFF image to a RADIANCE picture. The RADIANCE
picture file can be taken from the standard input or sent to
the standard output by using a hyphen ('-') in place of the
file name, but the TIFF image must be to or from a file.
Greg Ward
Sam Leffler really wrote this program because he wrote the
TIFF image manipulation library that was used.
Work on this program was initiated and sponsored by the LESO
group at EPFL in Switzerland.
Only TIFF 8-bit greyscale and 24-bit RGB color are
supported.
pfilt(1), ra_bn(1), ra_ppm(1), ra_pr(1), ra_pr24(1),
ra_t8(1), ra_t16(1), ximage(1)
Header and Footer
RA_TIFF(1) RADIANCE (11/15/93) RA_TIFF(1)
Page 1 (printed 7/17/96)
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