Spyder3 GigE Vision User Manual
03-032-20027-02 DALSA
46
Sets the camera’s analog gain value. Analog gain is multiplied by the analog signal to
increase the signal strength before the A/D conversion. It is used to take advantage of the
full dynamic range of the A/D converter.
GainSelector
Tap selection:
All or Tap1 to Tap2 for individual tap selection.
GainAbs
Gain value in a range from –10 to +10dB.
• Not available on the 4k model.
Related Commands:
CalculateCameraGain
Calibrating Camera Gain
Instead of manually setting the analog gain to a specific value, the camera can determine
appropriate gain values. This command calculates and sets the analog gain according to
the algorithm determined by the first parameter.
CameraGainAlgorithmSelector
Calibration algorithm to use.
1 = This algorithm adjusts analog gain so that 8% to 13% of tap region of interest (ROI)
pixels are above the specified target value (i.e. CalculateCameraGainTargetValue).
2 = This algorithm adjusts analog gain so that the average pixel value in tap’s ROI is equal
to the specified target value (i.e. CalculateCameraGainTargetValue).
3 = This algorithm adjusts digital gain so that the average pixel value in tap’s ROI is equal
to the specified target (i.e. CalculateDigitalCameraGainTarget).
4 = This algorithm adjusts the analog gain so that the peak tap ROI pixels are adjusted to
the specified target (i.e. CalculateCameraGainTargetValue).
CalculateCameraGainTargetValue
Calculation target value in a range from 1024 to 4055 DN (12 bit LSB).
• This function requires constant light input while executing.
• If very few tap pixels are within the ROI, gain calculation may not be optimal.
• When all taps are selected, taps outside of the ROI are set to the average gain of the
taps that are within the ROI.
• Perform analog gain algorithms before performing FPN and PRNU calibration.
• All digital settings affect the analog gain calibration. If you do not want the digital
processing to have any effect on the camera gain calibration, then turn off all digital
settings by sending the commands: DigitalOffsetRaw 0,
EnablePixelCoefficients 0, SubtractBackgroundRaw 0, and
DigitalGainRaw 4096
• Only algorithm 3 available on 4k models.
Related Commands: GainAbs, DigitalGainRaw
4k model
CalculateDigitalCameraGain = This
algorithm adjusts digital gain so that the
average pixel value in tap’s ROI is equal
to the specified target (i.e.
CalculateDigitalCameraGainTarget).
CalculateDigitalCameraGainTarget = Target of the
digital gain calibration algorithm.
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