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Author Topic: Thermal processing workflow for DJI-H20T  (Read 7387 times)

Carlos E

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Thermal processing workflow for DJI-H20T
« on: July 18, 2023, 08:34:00 PM »
Good afternoon

Is there any specific workflow for proccesing the thermal images obtained with a H20T? I guess that you cannot use the process described in Processing R-JPEG data in Metashape (bit.ly/46RcSPI) since when you load the thermal images the Multi-camera system doesn't appear in the Add Photos dialog. Therefore, my best option is to follow the procces described in Thermal imagery processing  (bit.ly/3DhMz7x)

Am I right or there are better options?

Thank you very much in advance.

BenW22

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Re: Thermal processing workflow for DJI-H20T
« Reply #1 on: July 19, 2023, 04:37:17 AM »
Hi Carlos,

From my limited experience - I had to convert the r-jpg images to tif format. It was not easy to find free software to do this and even my DJI contact could not come up with a solution. Which I think is a problem on DJI's side. Also the free DJI viewer is very poor and crashes frequently.

It would be good if Agisoft updated the Metashape to read them. I have previously sent H20t r-jpg images to Metashape, so hopefully this is on their list.

My successful work-around came from a very clever guy on github (Gustavo). He has written software to convert the r-jpg images to tiff. Metashape then imports the tifs correctly reading the temperature values.

https://github.com/gpereyrairujo/IRimage

Please read the Issue Section on his Github page to get a background on his work - https://github.com/gpereyrairujo/IRimage/issues/4

Cheers
Ben



Paulo

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Re: Thermal processing workflow for DJI-H20T
« Reply #2 on: July 19, 2023, 03:42:10 PM »
Hello,

from https://agisoft.freshdesk.com/support/solutions/articles/31000166933-processing-r-jpeg-data-in-metashape, Metashape does process RJPEG (Flir format). So I was able to process images from H20T that were previously transformed to this RJPEG format. All images produced had a _FLIR extended to original DJI name.
Best Regards,
Paul Pelletier,
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toxicmag

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Re: Thermal processing workflow for DJI-H20T
« Reply #3 on: December 12, 2024, 12:37:19 PM »
Dear community,

are there any news regarding the possibility of processing thermal images from DJI drones with Metashape?
Some of my customers complain about that this is not possible any more.

It seems like DJI changed the export possibilities of their thermal images and now there is no radiometric data available in the pictures.
Third party software like Metashape is now kept out and only DJI Terra is working.


What is the current status of:

1) Is this behaviour also your experience of the current possibilities?
2) Is rJPG working in up to date Metashape versions?
3) Anyone succeeds in the creation of an radiometric orthomosaic?


Thanks a lot and
Best regards

Alex
« Last Edit: December 12, 2024, 12:43:38 PM by toxicmag »
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olihar

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Re: Thermal processing workflow for DJI-H20T
« Reply #4 on: December 14, 2024, 02:04:35 AM »
Dear community,

are there any news regarding the possibility of processing thermal images from DJI drones with Metashape?
Some of my customers complain about that this is not possible any more.

It seems like DJI changed the export possibilities of their thermal images and now there is no radiometric data available in the pictures.
Third party software like Metashape is now kept out and only DJI Terra is working.


What is the current status of:

1) Is this behaviour also your experience of the current possibilities?
2) Is rJPG working in up to date Metashape versions?
3) Anyone succeeds in the creation of an radiometric orthomosaic?


Thanks a lot and
Best regards

Alex

Metashape has never been able to open the images directly from H20T correcty right out of the camera, you need to convert them to radiometric first.