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Click on Acquire White Image. The flat field demo will grab video frames, analyze the
pixel gray level spread, and present the statistics. The captured gray level for all pixels
should be greater than 128 but not saturated. If the histogram shows a good grab
accept the image as the white reference.
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Click on Save. The flat field correction data is saved as a TIF image with a file name of
your choice (suggestions are the camera name and its serial number).
Using Flat Field Correction
From the CamExpert menu bar enable Flat Field correction
(Pre-Processing • Flat Field Correction • Hardware). Now when doing a live grab or
snap, the incoming image is corrected by the current flat field calibration data for each
pixel.
Use the menu function Tools • Flat Field Correction • Load to load in a flat field
correction image from previously saved calibration data. CamExpert allows saving and
loading calibration data for all cameras used with the imaging system.
Flat Field Correction Control via Sapera LT or GigE Vision Compliant
Applications
Genie Sapera parameters for Flat Field Correction:
FlatFieldEnable = Enable Flat Field Correction {False=0, True=1}
FlatFieldFormat = {RO: mono 8, mono 9, mono 10, RGB}
FlatFieldWidth = read buffer width
FlatFieldHeight = read buffer height
FlatFieldGainMin = read minimum gain value
FlatFieldGainMax = read maximum gain value
FlatFieldOffsetMin = read minimum offset value
FlatFieldOffsetMax = read maximum offset value
FlatFieldGainBuffer = Flat Field correction gain data buffer
FlatFieldOffsetBuffer = Flat Field correction offset data buffer
+ Class constructor: SapFlatField::SapFlatField
In CamExpert, these features are available from the “Pre-Processing” menu.
XML features for Flat Field Correction:
ShadingCorrectionMode = {Enable, Disable, Calibration mode}
ShadingCorrectionPixelYCoordinate = Pixel Y Coordinate in the coefficient
table
ShadingCorrectionPixelXCoordinate = Pixel X Coordinate in the coefficient
table
ShadingCorrectionReplacePixel = Enable pixel replacement for current
pixel
ShadingCorrectionGain = Gain factor (multiplier) for the current pixel
ShadingCorrectionOffset = Offset value added to the current pixel after
the Gain multiplier
Genie Monochrome Series-GigE Vision Camera
Operational Reference
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