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)