Shad-o-Scan User Manual, Rev04
48
Shad-o-Scan 3001/4501 X-Ray Detector
Teledyne DALSA
Delete
To delete a customer defect map file from the host, the
Factory/Custom Upload
selector
in the
File Access Control
menu has to be set to
Customer
before opening the
File Access
Control
menu through
Upload/Download File
.
Select Type Miscellaneous in the first drop list and in the second drop list defect map.
Ensure yourself before pressing the
Delete
button, the selected file will be deleted
immediately with the message:
File Deleted Successfully.
Downloading
Both customer and factory Defect Maps can be downloaded. Set the
Factory/Custom
Upload
selector in the
File Access Control
menu in the preferred position before
opening the
File Access Control
menu through
Upload/Download File
.
To transfer a defect map file from the detector to the host press the button:
Download
(from Camera)
. A browse screen will be opened to select the
Save as…
location on the
host. Pressing the
Save
button after selecting the correct name and location, the
detector will start a transfer of the defect map file of the selected Resolution/Full Well
mode to the host. The download will finish with the message:
The file download
completed successfully.
Dark/Gain Maps
Introduction
Dark and Gain reference maps are stored in detector non-volatile memory. These
maps contain information required for Flat Field Correction (FFC).
The Dark reference map is created without exposure to X-ray. The Gain reference
map is calculated from dark-corrected images without object in the X-ray field.
Separate Dark and Gain maps are available for different Readout- and Full Well
modes. These maps are used by the detector to apply FFC on images, before
streaming them over the data communications interface.
The Dark and Gain maps can be used by the host application to apply offset and gain
corrections to images captured from the detector. The host application may use the
“Teledyne X
-Ray Proc
essing Library” functions to a
pply such corrections, or for the
creation and uploading of new correction maps. A copy of this library and its API can
be requested from your local technical customer support specialist or account
manager.
File Format
The file format of the dark (or gain) maps is as follows: a header indicates the
specification of the map and will be followed by a data block with the dark (or gain)
information per pixel. The 32 bytes header format is described below:
