Point Grey Flea3 FL3-U3 - Example: Setting Auto Exposure Using the Flycapture API

Point Grey Flea3 USB 3.0 Technical Reference 7 Imaging Parameters and Control
Offset Name Field Bit Description
1A70h AE_ROI_CTRL
Presence_Inq [0]
Presence of this feature
0:Not Available, 1: Available
[1-5] Reserved
ON_OFF [6]
Read: read a status
Write: ON or OFF for this feature
0: OFF, 1: ON
If this bit = 0, other fields will be read only
[7-31] Reserved
1A74h AE_ROI_OFFSET [0-31] 32-bit offset for the AE_ROI CSRs
Base + 0h AE_ROI_UNIT_POSITION_INQ
Hposunit [0-15] Horizontal units for position
Vposunit [16-31] Vertical units for position
Base + 4h AE_ROI_UNIT_SIZE_INQ
Hunit [0-15] Horizontal units for size
Vunit [16-31] Vertical units for size
Base + 8h AE_ROI_POSITION
Left [0-15] Left position of ROI
Top [16-31] Top position of ROI
Base + Ch AE_ROI_SIZE
Width [0-15] Width of ROI
Height [16-31] Height of ROI
Format:
7.10.3 Example: Setting Auto Exposure Using the FlyCapture API
The following FlyCapture 2.0 code snippet adjusts auto exposure to -3.5 EV using the C++ interface. The snippet
assumes a Camera object cam.
//Declare a Property struct.
Property prop;
//Define the property to adjust.
prop.type = AUTO_EXPOSURE;
//Ensure the property is on.
prop.onOff = true;
//Ensure auto-adjust mode is off.
prop.autoManualMode = false;
//Ensure the property is set up to use absolute value control.
prop.absControl = true;
//Set the absolute value of auto exposure to -3.5 EV.
prop.absValue = -3.5;
//Set the property.
error = cam.SetProperty( &prop );
Revised 9/27/2012
Copyright ©2011-2012 Point Grey Research Inc.
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