34
Shad-o-Scan 3001/4501 Detector
Teledyne DALSA
Image Processing Control
The following image (pre-)processing operations are considered standard practice in
today’s digital imaging applications, prior to distilling technical or
clinical information
through further image (post-)processing operations:
Defect Pixel Correction (DPC), in which defective or deviating pixels in the image are
interpolated using information from neighboring pixels; and
Flat Field Correction (FFC), a combination of black (offset) and gain correction, in which
spatial non-uniformities in the images due to detector or system (X-ray source,
collimation) characteristics are corrected to reduce fixed pattern noise and optimize
dynamic range.
The Rad-icon Detector controls, as shown by CamExpert, groups the image processing
specific parameters. Defect Pixel Correction (DPC) and Flat Field Correction (FFC)
functions are supported by the detector. The calibration reference maps required for DPC
and FFC opera
tions are loaded in the detector’s non
-volatile memory, for each
Readout
. A
set of factory maps and a set of customer maps are available. The factory maps are read-
only while the customer maps can be updated by the User.
The DPC and FFC functions can be used in combination with different
Trigger
and
Region
of Interest
readout modes.
The function features are listed in the table below; the following paragraphs describe
these features in more detail.
Display Name
Feature
Acc
Description
Factory
default
Min Max
FFC Enable
FFCEnable
RW
Turns On/Off
Flat Field
Correction
On
-
-
Off
Off
Off: Disabled
-
-
-
On
On
On: Enabled
-
-
-
FFC Processing
FFCActive
RO
Shows if FFC
processing is
enabled and
activated
-
-
-
Not Active
Not Active
FFC
processing
not active
-
-
-
Active
Active
FFC
processing
active
-
-
-
FFC Mode
FFCMode
RW
Changes
Mode for Flat
Field
Normal
-
-
