VGAIMAGE(1)                                                        VGAIMAGE(1)



NNAAMMEE
       vgaimage - RADIANCE picture display program for VGA

SSYYNNOOPPSSIISS
       vvggaaiimmaaggee  [  --cc  nnccoolloorrss ][ --dd ][ --bb ][ --mm ][ --gg ggaammmmaa ][ --ee ++//--ssttooppss ]
       ppiixxffiillee

DDEESSCCRRIIPPTTIIOONN
       _V_g_a_i_m_a_g_e takes the RADIANCE picture file _p_i_x_f_i_l_e and displays it  on  a
       VGA or Super VGA card.  The _-_c option specifies the number of colors to
       use (default fills color table).  The _-_d option turns off color dither-
       ing.   The _-_b option displays the image in black and white (greyscale).
       The _-_m option forces monochrome output.  The _-_g  option  specifies  the
       exponent  used  in  gamma correction; the default value is given by the
       environment variable GAMMA, or 2.2  if  GAMMA  is  undefined.   The  _-_e
       option  specifies  an exposure compensation in f-stops (powers of two).
       Only integer stops are allowed, for efficiency.

       If no _p_i_x_f_i_l_e is given, input is read from stdin provided either the _-_b
       or _-_m option is in effect.

CCOOMMMMAANNDDSS
       Once  a  picture  is displayed, the user may perform a number of opera-
       tions.  Some of the operations make use of an area of interest, defined
       by  pressing  a  mouse button and dragging the cursor over a section of
       the image.  Pressing a button and immediately releasing  it  defines  a
       single point as the area of interest.  A command is a single character.

       qq         Quit program.

       <<rreettuurrnn>>  Display the radiance averaged over the area of interest.

       ll         Display the luminance value in the area of interest.

       cc         Display the color in the area of interest.

EENNVVIIRROONNMMEENNTT
       GAMMA          the default gamma correction value

AAUUTTHHOORRSS
       Greg Ward

SSEEEE AALLSSOO
       aedimage(1), pfilt(1), rpict(1), rtrace(1), ximage(1)



RADIANCE                           11/15/93                        VGAIMAGE(1)
