TR-33 TR-34 TR-35 Trillium Rhino User's Manual - Frame Grabbers

Trillium User’s Manual 67
4. Examine the value of the white levels.
White Levels Lower than 254 DN
If the actual white levels are lower than 254 DN for each color, your white
reference is brighter than the white in your media and you need to brighten the
image by increasing the calibration target levels:
1. Adjust the levels for each channel by sending the command
correction_set_balance {100 * Desired Levels/Actual
Levels for each Color}.
2. Re-calibrate the camera.
White Levels Higher than 254 DN
If the actual white levels are higher than 254 DN, your white reference is dimmer
than the white in your media and you need to stop saturation by reducing the
calibration target levels:
1. Send the command correction_set_balance 50, 50, 50.
2. Re-calibrate the camera.
3. Obtain the image data for the actual white levels recorded by the camera by
sending the command get_line #channel, 20.
4. Examine the value of the white levels.
5. Adjust the levels for each channel by sending the command
correction_set_balance {100 * Desired Levels/(2 * Actual
Levels for each Channel)}
6. Re-calibrate the camera
The desired levels for each channel should now be met when imaging the white
present in the media.
Saving your Settings
After you have completed the calibration you can save these settings in the
camera's non-volatile memory in order to retain them after a power down/up
cycle. To save your settings, send the command write_settings.
DALSA 03-32-10119-03