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RawThermalImage information and extraction

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This topic contains 2 replies, has 2 voices, and was last updated by Profile photo of Filipe Filipe 4 years, 6 months ago.

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  • #4907

    Profile photo of Filipe
    Filipe

    Participant

    Hello,

    Im having problem extracting the 'rawthermalimage' from Flir files, but I can manage to solve this with the exiftool application, Im trying to extract them using LabVIEW.
    My real problem is the raw image data interpretation. I have those images:

    Thermal: https://drive.google.com/open?id=0BzSW60ZeIxpVd0lmb1ZXMGtuMTg
    RawThermalImage: https://drive.google.com/open?id=0BzSW60ZeIxpVVV9XVTl4Q0lMenc

    Someone can explain what these ‘rawthermalimage’ means? why do I have those phase changes in the image?
    can I proccess this image in way to get the absolute temperature values from each pixel?

    thankyou very much for your attention, i`m looking forward for your answer.
    Sorry for bad english =D.

    Filipe.

    #4908

    Profile photo of Ian Butler
    Ian Butler

    Participant

    The banding, that you call “phase changes”, looks like the values are being interpreted with the wrong endianness. If you interpret in the opposite endianness or perform a byte-swap operation on the data, it should come out correct.

    The raw thermal is 16-bit per pixel single channel, and I believe it is big endian.

    #4917

    Profile photo of Filipe
    Filipe

    Participant

    Topic solved,

    thank you all

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