Point Grey Flea3 GigE Technical Reference
8 Flea3 GigE Attributes
Model
Range
FL3-GE-13S2C-C
0 dB to 24 dB
FL3-GE-14S3M-C
0 dB to 24 dB
FL3-GE-14S3C-C
0 dB to 24 dB
FL3-GE-20S4M-C
0 dB to 24 dB
FL3-GE-20S4C-C
0 dB to 24 dB
FL3-GE-28S4M-C
0 dB to 24 dB
FL3-GE-28S4C-C
0 dB to 24 dB
FL3-GE-50S5M-C
0 dB to 24 dB
FL3-GE-50S5C-C
0 dB to 24 dB
Increasing gain also increases image noise, which can affect image quality. To
increase image intensity, try adjusting the lens aperture (iris) and
Shutter Time
time first.
To adjust gain:
n
GenICam—
Analog Control
n
FlyCapture API—
Setting Gain Using the FlyCapture API
8.11 Auto Exposure
Auto exposure allows the camera to automatically control shutter and/or gain in order to achieve a specific average
image intensity. Additionally, users can specify the range of allowed values used by the auto-exposure algorithm by
setting the auto exposure range, the auto shutter range, and the auto gain range.
Auto Exposure allows the user to control the camera system’s automatic exposure algorithm. It has three useful states:
State
Description
Off
Control of the exposure is achieved via setting both Shutter and Gain. This mode is achieved by
setting Auto Exposure to Off, or by setting Shutter and Gain to Manual.
Manual Exposure Control
The camera automatically modifies Shutter and Gain to try to match the average image intensity to
the Auto Exposure value. This mode is achieved by setting Auto Exposure to Manual and either/both
of Shutter and Gain to Automatic.
Auto Exposure Control
The camera automatically modifies the value in order to produce an image that is visually
pleasing. This mode is achieved by setting the all three of Auto Exposure, Shutter, and Gain to
Automatic. In this mode, the value reflects the average image intensity.
Auto Exposure can only control the exposure when Shutter and/or Gain are set to Automatic. If only one of the settings
is in "auto" mode then the auto exposure controller attempts to control the image intensity using just that one setting. If
both of these settings are in "auto" mode the auto exposure controller uses a shutter-before-gain heuristic to try and
maximize the signal-to-noise ratio by favoring a longer shutter time over a larger gain value.
The auto exposure algorithm is only applied to the active region of interest, and not the entire array of active pixels.
Revised 10/29/2013
Copyright ©2010-2013 Point Grey Research Inc.
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