NAME

       ra_t16 - convert RADIANCE picture to/from Targa 16 or 24-bit image file

SYNOPSIS

       ra_t16 [ -2 ][ -3 ][ -g gamma ][ -e +/-stops ] [ input [ output ] ]
       ra_t16 -r [ -g gamma ][ -e +/-stops ] [ input [ output ] ]

DESCRIPTION

       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.

AUTHORS

       Greg Ward

BUGS

       Run-length encoded files can be read but not written with this program.

SEE ALSO

       pfilt(1), ra_bmp(1), ra_bn(1),  ra_ppm(1),  ra_pr(1),  ra_pr24(1),  ra_t8(1),  ra_tiff(1),
       ximage(1)