DUNNCOLOR
1
BRL-CAD
BRL-CAD

# dunncolor

set exposure values for a Dunn Model 631 camera

      dunncolor
        -p
        baseval
        redval
        greenval
        blueval

## DESCRIPTION

Dunncolor sets the exposure values in the Dunn Instruments Model 631 camera to the specified values. If the `-p` flag is used, the Polaroid (8X10) exposure values are set. Otherwise, the auxiliary camera exposure values are set. baseval, redval, greenval, and blueval, are values between 0 and 255 used to calculate the exposure times for the red, green, and blue filters. The final value for each color is the product of baseval and the value for that color (redval, greenval, or blueval). Exposure timing is based on the counting of vertical SYNC pulses. The final exposure value indicates the number of SYNC pulses for which the camera's monitor should be unblanked. At a 60 Hz rate, this means an exposure time of 1 second for every 60 SYNC pulses. Dunncolor reads the old values from the camera and prints them before setting the new values. The new values are then read from the camera and printed to verify that they have been changed. The five values printed are the exposure values for base, red, green, blue and black/white.

## EXAMPLES

35mm Kodachrome 64 at f/4, shaded images

    dunncolor 2 80 16 16

35mm Kodachrome 64 at f/4, single-pixel wireframes, hires

    dunncolor 14 70 16 18

16mm Video News Film 7250, f/8

    dunncolor 1 56 14 14

Typically, red is 4X green and blue.

## DIAGNOSTICS

Diagnostics are intended to be self-explanatory.

## FILES

/dev/camera

  camera device supported by the operating system

## SEE ALSO

brlcad 1, dunnsnap 1

## AUTHOR

BRL-CAD Team

## COPYRIGHT

This software is Copyright (c) 1989-2013 by the United States Government as represented by U.S. Army Research Laboratory.

## BUG REPORTS

Reports of bugs or problems should be submitted via electronic mail to <devs@brlcad.org>.