FLI R
Duo P ro R Us e r Guide
Duo Pro R User Guide, Rev. 1.0
Information on this page is subject to change without notice
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is that radiometry parameters, such as emissivity and background temperature, can be adjusted in
post-processing for more thorough analysis and reporting.
If a compatible flight controller is available telemetry will be captured and saved in standard
metadata fields.
Files have a “_R.jpg” extension.
Note: the 8-bit thumbnail will change based on the camera video display mode.
-
If video display mode is set to “IR”, the
RJPEG thumbnail will be a thermal image.
-
If video display mode is set to “Visible” or “Picture
-in-
Picture”, the thumbnail will
be a low-quality visible image
No matter what the thumbnail appears as, the full IR and Visible image data will always be contained
within the file.
6.2.2
TIFF
TIFF is uncompressed 14-bit temperature linear sensor data with no post processing. If a
compatible flight controller is available, telemetry will be captured and saved in standard metadata
fields. This is the standard format required by most mapping applications.
Note: While TIFF is a standard file-format, it should be noted that radiometric parameters (such as
emissivity and background temperature) cannot be adjusted in post-processing. This is why FLIR
generally recommends the RJPEG file format.
The 14-bit TIFF file format of the Duo Pro R camera contains temperature information in the form
of pixel intensities. These pixel values can be converted into temperature using the following
formulas:
[counts@High Resolution] * 0.04
–
273.15 = deg C
[counts@Low Resolution] * 0.40
–
273.15 = deg C
where
“
counts@High Resolution
”
are the individual pixel values recorded using the Temp Range
setting of High (-25 to +135C) and
“
counts@Low Resolution
”
are pixel values recorded at a Temp
Range setting of Low (-40 to +550C).
Individual pixel values can be converted manually. FLIR’s ResearchIR software program can
convert the entire image as well. Alternatively, if pixel intensities of TIFF files can be exported in a
format that Microsoft Excel can recognize (.CSV for example), the conversion can be performed
using Excel tools.
In software programs like FLIR’s ResearchIR, these conversion formulas can be applied to images
by utilizing the Filter tools. Enable the Gain Filter and assign it a value of either 0.04 or 0.4,
depending on the camera’s Temp Range setting at the time of capture. Enable the Offset filter and
assign it a value of -273.15.
