Multispectral and Thermal
Multispectral Support
Section titled “Multispectral Support”WebODM has support for radiometric normalization, which is able to generate reflectance orthophotos from multispectral cameras. Multispectral cameras capture multiple shots of the scene using different band sensors.
Supported Sensors
Section titled “Supported Sensors”While we aim to support as many cameras as possible, multispectral support has been developed using the following cameras, so they will work better:
Other cameras might also work. You can help us expand this list by sharing datasets captured with other cameras.
Creating Orthophotos from Multispectral Data
Section titled “Creating Orthophotos from Multispectral Data”For supported sensors listed above (and likely other sensors), users can process multispectral data in the same manner as visible light images. Images from all sensor bands should be processed at once (do not separate the bands into multiple folders). Users have the option to pass the --radiometric-calibration parameter with options camera or camera+sun 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).
NDVI and other vegetation indices can be calculated from these stitched orthophotos using software such as QGIS.
Thermal Support
Section titled “Thermal Support”WebODM has support for radiometric calibration of thermal data, which is able to generate temperature orthophotos from long-wave infrared (LWIR) cameras. LWIR images can be processed alone or as part of a multispectral dataset.
Hardware
Section titled “Hardware”While we aim to support as many cameras as possible, thermal support has been developed using the following cameras, so they will work better:
Other cameras might also work. You can help us expand this list by sharing datasets captured with other cameras.
Process the images using the --radiometric-calibration camera parameter to enable radiometric calibration.