Users Manual – svs4021, svs2020,svs2050, svs2051, svs1020, svs1050, svs285, svs340, svs625
p. 27
Last Update 20.07.2009
balanced in this case in order to capture high quality images without any visible
border on the join between both taps.
Auto tap balance is usually switched “Off” during normal camera usage. It can
be activated for two modes:
Once
Continuous
When switched to “Once”, captured images will be checked for tap balance and
in case of a deviation, new left/right gain factors will be determined and be sent
to the camera. As soon as a balance is achieved between left and right channel,
the mode returns to “Off” automatically.
Mode “Once” is activated when a camera is opened. After capturing one or
multiple images, the mode switches back to “Off” what is the normal state for
camera usage.
In case of big changes for gain and/or exposure, it might be desirable to
monitor tap balance continuously. In this case the auto tap balance mode
should be switched to “Continuous”. There is no visible runtime penalty for the
“Continuous” mode since only a small stripe in the middle of each image is used
for evaluating tap balance.
Current tap balance will be displayed numerically in a range from -1.5 dB to
+1.5 dB as well as graphically by a slider. The slider can also be used for
manually adjusting arbitrary gain factors. The check box “Gain balance” has to
be checked in order to enable the slider for manual adjustments.
Current balance settings can be saved into a file and restored later using the
“Save” and “Load” buttons. Appropriate file save/load dialogs will open after
clicking on a button. Saving/Loading auto balance settings might be applicable
in case of working with different gain/exposure settings regularly. This would
avoid the need for running auto tap balance each time after changing the
gain/exposure settings.
A camera can also be switched to single-tap if this feature is supported
5.6 AutoGain/AutoExposure
When the “Auto” checkbox is activated for cameras that provide for the
AutoGain/AutoExposure feature, the “Luminance” panel changes to show the
settings that apply to this mode of operation. The manual settings for gain and
offset will disappear since the luminance will be controlled automatically.
The automated luminance control algorithm takes advantage of both, exposure
and gain settings. First the exposure will be tried to adjust it such that a set
