ra_t161
Convert radiance picture to/from targa 16 or 24-bit image file
Usage
ra_t16 [-2]
[-3]
[-g
gamma]
[-e
+/-stops]
[input
[output]]
ra_t16 -r
[-g
gamma]
[-e
+/-stops]
[input
[output]]
Overview
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.
Releases
Unchanged in 3 releases since Debian 5.0 (Lenny).