USB3.0 Board Level Camera
·
User Manual
47
Table 11-2
Exposure Method and Principle
Exposure Method
Principle
Off
The camera exposures according to the value configured by
user in
Exposure Time
.
Once
Adjust the exposure time automatically according to the
image brightness. After adjusting, it will switch to
Off
Mode.
Continuous
Adjust the exposure time continuously according to the
image brightness.
When the
Exposure Auto
is set as
Off
, you can enter
Exposure Time
manually. When the
Exposure
Auto
is set as
Once
or
Continuous
, the exposure time should be within the range of
Auto Exposure
Time Lower Limit
and
Auto Exposure Time Upper Limit
.
Figure 11-16
Set Exposure Time under Once or Continuous Mode
If the camera is under
Continuous
exposure method, once external trigger mode is enabled, the
camera will automatically switch to
Off
exposure mode.
11.9
Set Gain
The gain function may differ by camera models.
The camera has 2 types of gain, including the analog gain and digital gain. The analog gain is
applied before the signal from the camera sensor is converted into digital values, while digital gain
is applied after the conversion.
When increasing gain, the image noise will increase too, which will influence image quality. If you
want to increase image brightness, it is recommended to increase t
he camera’s exposure time. If
the exposure time reaches its upper limit, it is recommended to increase analog gain. If the image
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