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Setup the camera to capture a uniform dark image. Black paper with no illumination and the
camera lens' iris closed to minimum can provide such a dark image. Or cover the lens with a
black lens cap.
Click on Acquire Black Image. The flat field calibration tool will grab video frames, analyze
the pixel gray level spread, and present the statistics. The desired black reference image should
have pixel values less then 20. If the results are acceptable, accept the image as the black
reference.
Setup the camera to acquire a uniform white image (but not saturated white). Even illumination
on white paper can be used, with a gray level of minimum of 128 (8-bit mode). It is preferable
to prepare for the white level calibration step before starting the calibration procedure (see the
previous section for information).
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.
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). The FFC data file is uploaded
to the Linea GigE via the
Linea GigE Series Camera
file access
features.
Operational Reference 61
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