Performing An Ffc Setup Via Sapera Camexpert; Set Up Dark And Bright Acquisitions With The Histogram Tool - Dalsa Everywhereyoulook Linea Lite GigE User Manual

Performing an FFC Setup via Sapera CamExpert

The Sapera LT CamExpert tool provides an easy GUI based method for a user to perform a Flat
Field Calibration. The process first requires the user to plan acquisitions in dark and bright
conditions, followed by the FFC process itself. These steps are detailed below.

Set up Dark and Bright Acquisitions with the Histogram Tool

Verify the camera's acquisition with a live grab and prepare to grab a flat light gray image required
for calibration. Ideally, a controlled diffused light source aimed directly at the lens should be used
or a non-glossy paper with the lens slightly out of focus (or evenly lit wall). Note the lens iris
position for a bright but not saturated image.
Verify a Dark Acquisition
Close the camera lens iris and cover the lens with the lens cap. Using CamExpert, click on the grab
button and then select Histogram. The following figure shows a typical histogram for a camera
grabbing a dark image.
Important: the average pixel value for the frame is close to black.
Note: Sensors might show a much higher maximum pixel value due to one or more
"hot pixels".
Linea Lite GigE Series Camera Camera Performance and Features • 41