Correction data, Correction sets, File system – ALLIED Vision Technologies Pearleye P-030 LWIR User Manual
Page 36: Correction data correction sets, In chapter, T in chapter, Rection sets
Image processing
Pearleye Technical Manual V2.2.1
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Correction data
Ex factory camera specific correction data for each correction module are deter-
mined and stored in the camera so that an optimum image quality is available.
A PC with a Gigabit Ethernet interface can transmit the temperature data
directly to the main memory or rather to the display.
Correction sets
For high quality requirements we recommend to use more than one correction
data set. So operating conditions of the camera are mostly compensated.
Several different correction sets for the two-point correction are stored inside
the camera.
File system
The Pearleye P-007 LWIR / Pearleye P-030 LWIR camera models are equipped
with a non-volatile data memory (64 MByte flash) which records configuration
and correction data. The data is managed in a minimalist file system.
Due to the file system there are the following restrictions:
•
Files are identified via one byte. Regarding to its function this file number
is somewhat comparable to the file name (including extension) from the
PC world. Valid file numbers are between 1 (0x01) and 254 (0xFE).
•
The file type can be defined via a further byte. It is an optional clustering
feature for files, but it has no relevance for the file identification.
•
There is no directory structure. All files are on one single hierarchy level
within the main directory. This results in a maximum possible number of
254 simultaneously stored files, because each file number can only be
allocated once.
Ex factory the camera is usually already equipped with several files, containing
system and correction data. The Pearleye P-007 LWIR / Pearleye P-030 LWIR
don’t use the whole 64 MByte, so that a customer can also use this memory for
own data.
Note
To reach more exact temperature measurements consider the
emission ratio and the environment temperature: For more
information see Chapter
Consideration of the emission ratio
Note