Extracting png from E54 recent FLIR camera

[thurston]

Hello,

I really like exiftool which manages to perfectly process E45, E300 (quite old) flir camera jpg image.
i use this
exiftool -b -RawThermalImage E45.jpg > E45.png
exiftool -b -RawThermalImage E54.jpg > E54.png
Still, on latest IR camera (E54), this doesn't give a valid png image i can later process with a python script. Is it a known issue? Is there a workaround?
Joined 2 images which gives completly different png files
E45.jpg is ok once processed.
E54.jpg is not giving a valid png file (psychedelic B&W kind of).
Joined as well the png image. see the difference.
Thanks for your help and long life to exiftool.
Cheers
Thurston

SG Edit:
E45.jpg/png



E54.jpg/png

[StarGeek]

A previous thread (which references this post) shows a similar problem image. The problem might be this from the RawData tags section

Note that most FLIR cameras using the PNG format seem to write the 16-bit raw image data in the wrong byte order.

Extracting the PNG image, piping it directly into ImageMagick to convert it to RAW data, which is then piped again to invert the byte order, results in an image which looks to be correct.

This is the command I used. I'm using ImageMagick 7, which is why the command is magick. ImageMagick 6 used separate commands to process files, which is why the links above don't have magick in them.
exiftool -b -RawThermalImage Y:\!temp\x\y\E54.jpg | magick  convert - gray:- | magick convert -depth 16 -endian msb -size 320x240 gray: Y:\!temp\x\y\E54_New.png

And the resulting image


So exiftool is extracting the image correctly, it's just that it was written incorrectly in the first place.

Edit: Do you mind if I save this image and add it to my notes, which I will probably make public at some point?

[thurston]

Excellent, and really thank you for the tip (and command).
(On linux, simply install imagemagick and use convert directly)
exiftool -b -RawThermalImage E54.jpg | convert - gray:- | convert -depth 16 -endian msb -size 320x240 gray: E54_New.png
Please use the image as you want, and really thank you for your help
cheers
T