Camera Control and Performing a Scan
Instruction Manual
SK22368U3TOC
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Instruction Manual SK22368U3TOC © 2022-03 E
Shading Correction compensates for non-uniform illumination and lens vignetting, as well as any differences in
pixel sensitivity. The signal from a white homogeneous background is obtained and used as a reference to correct
each pixel of the sensor with an individual factor. The result is a leveled signal along the full sensor length. A
shading correction with a balanced RGB sensitivity ensures a natural color reading. The reference signal is stored
in the Shading Correction Memory (SCM) of the camera and subsequent scans are normalized using the scale
factors from this white reference.
Step 1: White Balancing
• Use a homogeneous white object, e.g. a white sheet of paper, to acquire the RGB line signals.
Color line signal with separated RGB curves
White Balancing by Gain Adjustment
• Open the "Gain/Offset Control" dialog. Use the gain sliders to adjust all three curves to the same level. Some
camera models provide two gain/offset channels - thus two sliders - per color.
"Gain/Offset Control" Dialog
White Balance and Shading Correction
