Table of Contents
ra_t16 - convert RADIANCE picture to/from Targa 16 or 24-bit
image file
ra_t16 [ -2 ][ -3 ][ -g gamma ][ -e +/-stops ] [ input [
output ] ]
ra_t16 -r [ -g gamma ][ -e +/-stops ] [ input [ output ] ]
Ra_t16 converts between RADIANCE and Targa 16-bit or 24-bit
RGB image files (type 2 in Targa's documentation). In the
default mode, a RADIANCE picture is converted to an RGB file
of the same horizontal and vertical dimensions with 16-bits
per pixel. The -3 option tells the program to produce a
24-bit image file instead. The -g option specifies the
exponent used in gamma correction; the default value is 2.2.
An exponent of 1.0 turns gamma correction off. 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 16-bit or
24-bit Targa file to a RADIANCE picture. The determination
of depth is made automatically on reverse translation, so
the -2 and -3 options are not necessary. If the output file
is missing, the standard output is used.
Greg Ward
Run-length encoded files can be read but not written with
this program.
pfilt(1), ra_bn(1), ra_ppm(1), ra_pr(1), ra_pr24(1),
ra_t8(1), ra_tiff(1), ximage(1)
Header and Footer
RA_T16(1) RADIANCE (11/15/93) RA_T16(1)
Page 1 (printed 7/17/96)
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