Multispectral Support

Hardware

While we aim to support as many cameras as possible, multispectral support has been developed using the following cameras, so they will work better:

• MicaSense RedEdge-MX and Altum

• Sentera 6X

• DJI Phantom 4 Multispectral

Other cameras might also work. You can help us expand this list by sharing datasets captured with other cameras.

Usage

Process all the images from all bands at once (do not separate the bands into multiple folders) and pass the –radiometric-calibration parameter to enable radiometric normalization. If the images are part of a multi-camera setup, the resulting orthophoto will have N bands, one for each camera (+ alpha).

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Sentera AGX710

While this sensor is not officially supported by ODM, the following workflow gives some good results.

• all JPGs from the NDRE directory should be renamed with the exact following pattern 0000X_NIR.jpg. No extra ‘_’ should be present in the file names ie 10_51_14_IMG_00008.jpg => 00008_NIR.jpg

• all JPGs from the nRGB directory should be renamed with the exact following pattern 0000X_RGB.jpg. No extra ‘_’ should be present in the file names ie 10_51_14_IMG_00023.jpg => 00023_RGB.jpg

• All renamed XXXX_NIR.jpg and XXXX_RGB.jpg should be placed in the same folder

• The following command could be used to create an odm_orthophoto.tif file

docker run  --rm -v  input_image_dir/:/code/images \
-v output_dir/odm_georeferencing:/code/odm_georeferencing  \
-v output_dir/odm_orthophoto:/code/odm_orthophoto \
-v output_dir/odm_report:/code/odm_report \
opendronemap/odm --auto-boundary

• After the successful ODM processing, odm_orthophoto.tif bands names could be accurately renamed using contrib/ndvi/rename_sentera_agx710_multispectral_tif.py script

python3 contrib/ndvi/rename_sentera_agx710_multispectral_tif.py  output_dir/odm_orthophoto.tif

• output_dir/odm_orthophoto.tif could be open with QGIS with correct band names