why you want to process remote sensing image with UAV software?
UAV software lack function for remote sensing data, I dont think you can make precision DEM from it
better process it with ERDAS or ENVI software.
and yes with stereo pair image you can make DEM from it
here :
https://www.researchgate.net/post/How_do_you_generate_DEM_from_Cartosat-1_STEREO_data