Comments (11)
what FLIR does from software to software, camera to camera is always a mystery (purposely no doubt). maybe send me a sample file since I don't know what your question really is. As you can tell from this package, we make use of exiftool's extraction capacity.
from thermimage.
from thermimage.
Splitting the files should still be possible. Admittedly, this R package isn't the best for working with videos since R isn't a fast environment to work. You could explore some bash/terminal code I've shared here: https://github.com/gtatters/ThermimageBash
I know this code works on old .SEQ files collected with Thermocam Researcher Pro as far back as 2008 when I first started collecting. It also works on .SEQ or .FCF files collected with ExaminIR.
But Thermimage mostly converts the files into their raw data, and then those raw files can be imported into ImageJ and you could use ThermimageJ (https://github.com/gtatters/ThermimageJ) to convert the raw data into temperature. These files would be smaller than working with .csv temperature files anyway.
If you have a small file you want me to test things out with to verify the code can operate on it, please feel free to share via wetransfer.com. My email can be found on my lab website: https://tattersalllab.com/contact-information/
from thermimage.
from thermimage.
my perl script (split.pl) can recognise some headers and that's what I will try with a sample file. The default one I'd first look for is "\x46\x46\x46\x00" but can try some others, simply to get and .fff file.
from thermimage.
The more up to date one is on ThermimageJ: https://github.com/gtatters/ThermImageJ/blob/master/scripts/split.pl
from thermimage.
from thermimage.
Not sure there will be any info on the conversion from 16bit to float within the file, but what could be stored within the info prior to the pixel start will be calibration constants for the conversion. Exiftool might be able to extract them for you.
https://exiftool.org/TagNames/FLIR.html
EEVBlog have a huge forum discussing how to convert FFF files into temperature.
And Walter Minkina's book discusses the algorithm to convert the raw value into temperature.
Minkina, W. and Dudzik, S. 2009. Infrared Thermography: Errors and Uncertainties. Wiley Press, 192 pp.
the conversion formula is also contained within the raw2temp() function in the Thermimage package, but requires that you have the calibration coefficients (exiftool refers to them as Planck coefficients in reference to the formula used).
maybe try running:
exiftool yourfilename.seq
and share the output here?
from thermimage.
from thermimage.
yes, a quadratic describing the relationship between the raw data and temperature would work. It's one of the solutions I have in my imageJ code.
from thermimage.
Related Issues (20)
- Bug in readflirJPG function? HOT 5
- flirsetting HOT 6
- Info about metadata HOT 5
- Error when loading FLIR jpg HOT 2
- Equation to convert to temperature HOT 4
- Error in raw2temp HOT 3
- Does the library work with files other than FLIR? HOT 13
- "Error in if (cams$Info$RawThermalImageType == "TIFF") { : argument is of length zero" error HOT 18
- convertflirJPG() seems to think flir jpg files are empty HOT 8
- Can't open FLIR ONE jpg HOT 8
- GPSLatitude and GPSLongitude not being read properly by flirsettings() HOT 4
- Package not extracting thermal image data HOT 1
- Getting random frame extraction times HOT 3
- Thermimage / Error in system2 HOT 4
- DN to Temp conversion results in a data matrix that exceeds (696, 928) the dimensions of the original camera resolution (640x480) HOT 11
- ATA1-2, ATB1-2, ATX are no constants HOT 13
- Importing images causes loss of resolution HOT 3
- Thermimage - convertflirVID, Warning messages: 1- in system2, 2- in file.remove HOT 17
- Error in writeBin & total frames HOT 17
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from thermimage.