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vgaimage - RADIANCE picture display program for VGA
vgaimage [ -c ncolors ][ -d ][ -b ][ -m ][ -g gamma ][ -e
+/-stops ] pixfile
Vgaimage takes the RADIANCE picture file pixfile 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 dithering. 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 pixfile is given, input is read from stdin provided
either the -b or -m option is in effect.
Once a picture is displayed, the user may perform a number
of operations. 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.
- q
- Quit program.
<return> Display the radiance averaged over the area of
interest.
- l
- Display the luminance value in the area of
interest.
- c
- Display the color in the area of interest.
- GAMMA
- the default gamma correction value
Greg Ward
aedimage(1), pfilt(1), rpict(1), rtrace(1), ximage(1)
Header and Footer
VGAIMAGE(1) RADIANCE (11/15/93) VGAIMAGE(1)
Page 1 (printed 7/17/96)
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