DJI Thermal Images Processing (converter to .tiff) SOLVED!

[Miro_Rava]

Thank you for this! Very helpful, and creates a beautiful orthomosaic, but unfortunately when I open it in ArcGIS it shows pixel DN instead of radiometric data...

Hi, this is unfortunate to hear, I'm not very practical with GIS softwares, I mainly produce outputs for 3d reconstruction .

Can you tell me more about the import problem in ArcGIS? It would be beneficial also for others if i can manage to fix it,
Thank you very much for your feedback anyway!

 

[Miro_Rava]

Thank you for this! Very helpful, and creates a beautiful orthomosaic, but unfortunately when I open it in ArcGIS it shows pixel DN instead of radiometric data...

Hi @xyzm,
I might have found one solution, but I'm not sure if you already tried.

When you export the orthomosaic, remember to check the "write alpha channel" as well, this will export the additional channel as float values.
I don't know if this is what you are looking for but it might help.

Let me know if you have suggestions!

 

[Mattia_Ventimiglia]

Thanks for the tool Miro!

I try to use it with Mavic 3 T but it seems that the B4 value is not correct, i attach my settings in Metashape.

I also add one rjpeg.

Can you help me?

Thank you

 

[Miro_Rava]

Thanks for the tool Miro!

I try to use it with Mavic 3 T but it seems that the B4 value is not correct, i attach my settings in Metashape.

I also add one rjpeg.

Can you help me?

Thank you

Hi Mattia,
Can you tell me more about your issue?

- in metashape are you using the tiffs or the rjpeg?
- you need to use tiffs (if you want also visual rgb images , but then you need to select the multicamera system at the start)
- once you set B4, remember to hit apply before going to the palette page

If it is easier for you, contact me by email at [email protected], since you are from italy I can share you my number and we can message on whatsapp if you need

 

[marcos.grinstein63@gmail.]

Thank you for your work sir, got one question, what version of metashape are you using? I dont get the same options when importing a folder.
Thanks

 

[Miro_Rava]

Thank you for your work sir, got one question, what version of metashape are you using? I dont get the same options when importing a folder.
Thanks

any version of metashape should work,
double check that your file/folder layout is one of the following cases:

1. you are using both tiffs (converted with my tool) and WIDE rgb jpegs from the main drone camera
   • in this case both the tiffs and wide_Rgb.jpeg must be the same number, if they are in different number metashape wont recognise them as the same multisensor camera. if you are in this wrong case, discard the wide and use only the tiffs.
   • the Layout should be like this (import the main folder):
     • MAIN_FOLDER
       • RGB_WIDE_1.jpg
       • RGB_WIDE_2.jpg
       • RGB_WIDE_3.jpg
       • ......
       • ......
       • ......
       • THERMAL_FOLDER
         • Thermal_1.tiff
         • Thermal_2.tiff
         • Thermal_3.tiff
         • .....
         • .....
         • .....
2. if you are using only tiff images, you wont see the option for multisensor camera, just use the single camera option and continue normally

Let me know if this helped, have a nice day!

 

[marcos.grinstein63@gmail.]

any version of metashape should work,
double check that your file/folder layout is one of the following cases:

1. you are using both tiffs (converted with my tool) and WIDE rgb jpegs from the main drone camera
   • in this case both the tiffs and wide_Rgb.jpeg must be the same number, if they are in different number metashape wont recognise them as the same multisensor camera. if you are in this wrong case, discard the wide and use only the tiffs.
   • the Layout should be like this (import the main folder):
     • MAIN_FOLDER
       • RGB_WIDE_1.jpg
       • RGB_WIDE_2.jpg
       • RGB_WIDE_3.jpg
       • ......
       • ......
       • ......
       • THERMAL_FOLDER
         • Thermal_1.tiff
         • Thermal_2.tiff
         • Thermal_3.tiff
         • .....
         • .....
         • .....
2. if you are using only tiff images, you wont see the option for multisensor camera, just use the single camera option and continue normally

Let me know if this helped, have a nice day!

Ill try it, do the names have to be RGB_WIDE_Number.JPG or any name_number.JPG will do?

 

[Miro_Rava]

Ill try it, do the names have to be RGB_WIDE_Number.JPG or any name_number.JPG will do?

They can be any name you like, usually I leave the name that came out of the dji camera, both for the thermal and the rgb ones, then you can give the main folder to my program and it will convert and replace all the thermal ones, and after open metashape and continue the procedure

 

[marcos.grinstein63@gmail.]

Thanks a lot

 

[Miro_Rava]

Thanks a lot

Did it work?

Hope it worked, it was a pleasure to help you!

 

[charliepapadelta]

Hi Miro, Grateful for you effort here. Would you happen to have a raster expression that transforms the radiometric data to absolute temperatures for the H20T?

 

[Miro_Rava]

Hi Miro, Grateful for you effort here. Would you happen to have a raster expression that transforms the radiometric data to absolute temperatures for the H20T?

Hi Charliepapadelta, I've converted many images from dji_radiometric (not the same as flir radiometric) to tiff with my tool, many of them were from H20T thermal cameras, can you elaborate a little bit more on what is your problem or what do you want to achieve? Do you mean a formula using my tool or maybe do you mean a formula for metashape?
I'll be happy to answer you!
Have a nice Day!

 

[charliepapadelta]

Hi Charliepapadelta, I've converted many images from dji_radiometric (not the same as flir radiometric) to tiff with my tool, many of them were from H20T thermal cameras, can you elaborate a little bit more on what is your problem or what do you want to achieve? Do you mean a formula using my tool or maybe do you mean a formula for metashape?
I'll be happy to answer you!
Have a nice Day!

Hi Miro,
Thank you for the response. Yes I am using Metashape to create the orthomosaic from the .TIFF images created from your conversion tool. I am wondering if you have come up with an raster expression that will transform the radiometric data within the ortho to absolute temperature values. I found this one for a Sensefly platform, 0.01*thermal_ir - 100. I found this one for the XT-2, 0.04*thermal_ir - 273.15. Both will give you an index which is useful. I am wondering if there is a way to get the absolute temperature from the H20T? Here are the links to a couple of threads I am referencing.

Processing R-JPEG data in Metashape

Metashape Professional edition supports processing of the data captured by thermal cameras and saved in R-JPEG (FLIR data) format. The article describes the basic stages of R-JPEG data processing. Loading photos Aligning photos Building DEM...

agisoft.freshdesk.com

Thermal imagery processing

Agisoft Metashape Professional supports processing of thermal data from AscTec (ARA format), WIRIS (TIFF format) cameras and cameras saving data in R-JPEG (FLIR data) format. For other thermal images if you are interested in temperature value...

agisoft.freshdesk.com

Thank you for looking at this.

-Chuck

 

[Miro_Rava]

Hi Miro,
Thank you for the response. Yes I am using Metashape to create the orthomosaic from the .TIFF images created from your conversion tool. I am wondering if you have come up with an raster expression that will transform the radiometric data within the ortho to absolute temperature values. I found this one for a Sensefly platform, 0.01*thermal_ir - 100. I found this one for the XT-2, 0.04*thermal_ir - 273.15. Both will give you an index which is useful. I am wondering if there is a way to get the absolute temperature from the H20T? Here are the links to a couple of threads I am referencing.

Processing R-JPEG data in Metashape

Metashape Professional edition supports processing of the data captured by thermal cameras and saved in R-JPEG (FLIR data) format. The article describes the basic stages of R-JPEG data processing. Loading photos Aligning photos Building DEM...

agisoft.freshdesk.com

Thermal imagery processing

Agisoft Metashape Professional supports processing of thermal data from AscTec (ARA format), WIRIS (TIFF format) cameras and cameras saving data in R-JPEG (FLIR data) format. For other thermal images if you are interested in temperature value...

agisoft.freshdesk.com

Thank you for looking at this.

-Chuck

Hi, the converted images in TIFF format that come out of my tool are already in C° Celsius, inside metashape raster transform you can simply put the thermal channel as a formula, like B1 (if you are using only thermal images) or B4 (if you are using also rgb images).

This works for me quite well, let me know if you need help, if so I can send you my metashape workflow.

 

[charliepapadelta]

Hi, the converted images in TIFF format that come out of my tool are already in C° Celsius, inside metashape raster transform you can simply put the thermal channel as a formula, like B1 (if you are using only thermal images) or B4 (if you are using also rgb images).

This works for me quite well, let me know if you need help, if so I can send you my metashape workflow.

Hi, I found another thread where you explain this. I will just give B1 a try. Thank you.