User`s manual

70 Piranha4 2K and 4K Camera Color User's Manual
03-032-20180-02 Teledyne DALSA
flatfieldCalibrationTarget
1. After calibration all pixels will be scaled to output this level
 Range: 8 bit, 0 to 255 DN
flatfieldCalibrationSampleSize
1. Number of lines to average when calibrating
2. 2048 or 4096
flatfieldCalibrationROIOffsetX
1. Together with ―flatfield Calibration ROIWidth‖ specifies the
range of pixels to be calibrated. Pixel coefficients outside this
range are not changed. It is possible to calibrate different
regions sequentially.
flatfieldCalibrationROIWidth
flatfieldCalibrationFPN
1. Save average line (of ―flatfield CalibrationSam p leSize‖ row s).
This is the first user correction applied – it is subtracted from
each line.
2. This feature may not be of use to many users as the camera
alread y subtracts true ―d ark current‖, bu t it m ay be u seful for
some to provide a per pixel offset correction.
3. Range 0 to 31 DN, 8 bit
4. Default value is 0 DN for each pixel
flatfieldCalibrationPRNU
1. Use ―flatfield CorrectionAlgorithm‖ to calculate the per p ixel
gain to achieve the specified target output.
2. Max 15.9998x
3. Default 1x
2. Contrast Enhancement
The offset and gain features can be used to maximize the use of the output dynamic range. Typical use is
to subtract the minimum pixel value expected and then gain up to the maximum pixel value to approach
full scale. This process may be useful for applications that process the RGB colors individually.
Offset
1. Single value added to each pixel
2. Range -32 to +31 DN
3. Positive values may be used to measure dark noise
Gain
1. Floating point digital multiplier applied to each pixel
2. Range 1x to 10x
Note: An application note describing a color transformation matrix calibration (document #03-
032-20181) is available. Please contact Teledyne DALSA Support for more information.