X64 Xcelera-HS PX8 User's Manual
CamExpert Quick Start
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X64 Xcelera-HS PX8 Flat Field/Flat Line Support
The X64 Xcelera-HS PX8 supports hardware based real-time Flat Field Correction. The default
firmware supports 8 bit flat field correction. If required, 12 bit flat field correction firmware is also
available. See
User Programmable Configurations
" on page 9
for information on driver versions.
Flat Field Correction is the process of eliminating small gain differences between pixels in a sensor
array. That sensor when exposed to a uniformly lit field will have no gray level differences between
pixels when applying the calibrated flat field correction to the image. The CamExpert Flat Field tool
functions with hardware supporting flat field processing.
Loading the Required Camera File
Select the required camera configuration file for the connected camera. Verify the acquisition with
the live grab function. Make camera adjustments to get good images.
Set up Dark and Bright Acquisitions with the Histogram Tool
Before performing calibration, verify the acquisition with a live grab. Also at this time, make
preparations to grab a flat light gray level image, required for the calibration, such as a clean
evenly lighted white wall or non-glossy paper with the lens slightly out of focus.
Ideally, a controlled
diffused light source aimed directly at the lens is used
. Note the lens iris position for a bright but not saturated
image. Additionally check that the lens iris closes well or have a lens cover to grab the dark
calibration image.
Verify a Dark Acquisition
Close the camera lens iris and cover the lens with a lens cap. Using CamExpert, click on the grab
button and then the histogram button. The following figure shows a typical histogram for a very
dark image.
Figure 14: Flat Field - Verify a Dark Acquisition
