ALLIED Vision Technologies Pike F-1600 - Manual (Page 235)

Controlling image capture
PIKE Technical Manual V5.1.2
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Smear reduction (not Pike F-1100/1600)
Smear reduction: definition
Definition Smear is an undesirable CCD sensor artefact creating a vertical bright line that
extends above and below a bright spot in an image.
Definition Smear reduction is a function implemented in hardware in the camera itself to
compensate for smear.
Smear reduction: how it works
To reduce smear a reference line is used. This reference line is built from the
mean value of the so-called black lines (two lines before image start). The ref-
erence line is subtracted from every line of the whole image.
But how will this reduce smearing?
The point is: black lines have no image information but are also affected from
smearing. Thus the smearing effect itself is isolated and can be reduced in the
whole image.
The two additional black lines and the calculated anti-smear values do not
lower the transfer rates significantly due to hardware implementation.
Smear reduction: switch on/off in register and
SmartView
To switch on/off smear reduction in advanced registers, see Chapter Smear
reduction (not Pike F-1100/1600) on page 369.
In SmartView: Edit settings  Adv3 tab ( Smear reduction Enable)