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CamExpert Quick Start
X64 Xcelera-HS PX8 User's Manual
Important: In this example, the average pixel value for the frame is close to black. Also, note
that most sensors will show a much higher maximum pixel value due to one or more "hot pixels".
The sensor specification accounts for a small number of hot or stuck pixels (pixels that do not
react to light over the full dynamic range specified for that sensor).
Verify a Bright Acquisition
Aim the camera at a diffused light source or evenly lit white wall with no shadows falling on it.
Using CamExpert, click on the grab button and then the histogram button. Use the lens iris to
adjust for a bright gray approximately around a pixel value of 200 (for 8-bit pixels). The following
figure shows a typical histogram for a bright gray image.
Figure 15: Flat Field - Verify a Bright Acquisition
Important: In this example, the average pixel value for the frame is bright gray. Also, note that
sensors may show a much higher maximum or a much lower minimum pixel value due to one or
more "hot or dead pixels". The sensor specification accounts for a small number of hot, stuck, or
dead pixels (pixels that do not react to light over the full dynamic range specified for that sensor).
Once the bright gray acquisition setup is done, note the camera position and lens iris position so as
to be able to repeat it during the calibration procedure.
