Flat Field Calibration Window
The Flat Field calibration window provides a three step process to acquire two reference
images and then save the flat field correction data for the Genie used. To aid in determining
if the reference images are valid, a histogram tool is provided so that the user can review
the images used for the correction data.
CamExpert Flat Field Calibration Menu
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Click on the Advanced Setting button to change the default number of frames
averaged for each calibration step. The default value is 10 frames.
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Setup the camera to capture a uniform black image. Black paper with no illumination
and the camera lens’ iris closed to minimum can provide such a black 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 Set up Dark and Bright Acquisitions with
the Histogram Tool for information).
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Operational Reference
Genie Monochrome Series-GigE Vision Camera