copy ALL exif information for multispectral camera

[Lindsii]

Wow this is very impressive.
From this I get 21 values of 8 bytes each, I should just have 19. But I will check this.

Thank you 1000000 times, Phil!

[Lindsii]

Thanks very much Phil!

From that I will get 1 Long, and 20 Double values, althoug i just should have 18, but I will see why that is.

Thanks again 100000 times, Phil!!

[Phil Harvey]

There look to be 18 double values:  10 in the first opcode starting at offset 24 (dec), and 8 in the second opcode starting at offset 120 (dec).

- Phil

[Lindsii]

wow this is amazing.
Is the phdump available?

And do you see a possibility to batch this process, for exmaple for a whole folder of images?
Thank you so much!

[Phil Harvey]

I hadn't made phdump available yet, but if you can compile it, here is the source code for you.

To compile with g++, the command is:  g++ -o phdump phdump.cxx

Batching this process would require a bit of programming or fancy scripting I think.

- Phil

[Lindsii]

Thank you so much Phil, you helped me so much, I will write about you in my acknoledgements!!

[CmdrDaniels]

Thanks heaps!!!
I have the binary information to convert them, so I will see how it goes.
Thanks so much
linda

Hi!  The information in this thread is very useful!
I am also trying to extract and understand the binary information in this XMP block from the RedEdge metadata.

Lindsii - can you share the information that shows how to convert this binary information to the camera parameters?
Thanks

[marliesL]

Hi

I guess my question is the same than the original but I am using Pythonscripts.

My code reads:
subprocess.call(['exiftool', '-m','-overwrite_original', '-TagsFromFile', "old_im.tif", "new_im.tif"])

Although the coordinates are transferred to the new image, the images are not recognised as multispectral data in Agisoft.
Did I not copy the band information?

Thanks
Grtz

[Phil Harvey]

The OpcodeList tags are marked as unsafe (!) (see here), so they must be copied explicitly.  You might also want to add -all:all to write the tags in the same locations:

Code Select Expand

subprocess.call(['exiftool', '-m','-overwrite_original', '-TagsFromFile', "old_im.tif", "-all:all", "-opcodelist1", "-opcodelist2", "-opcodelist3", "new_im.tif"])

There may be other tags you want to add as well.

- Phil

[marliesL]

Hi Phil

Thank you for the quick repsonse.
I get this warning:
Warning: Can't convert value for SubIFD:OpcodeList3 (no PrintConvInv)
The images are still nog recognised as multispectral data. Could the tag, holding this information be, 'ImageLayer' or is it in this OpcodeList3?

Kind regards
Marlies

[Phil Harvey]

Right.  You must copy the unconverted values for these tags (ie. -opcodelist1# -opcodelist2# -opcodelist3#).

As I said, you may need to copy more tags than just these.  You'll have to do a bit of detective work yourself to see what is required.

- Phil