We have a series of approx 2500 images from a manned flight and are using ODM to generate an orthophoto. I’ve been told that we believe the resolution was around 3-5 cm/pixel, flight altitude was roughly 1200 feet AGL, flight time was about 1 hour, and flight area was approximately 3.5 square miles.
The only option specified on the command line was --fast-orthophoto. After failing on AWS instances with up to 160G RAM, it finally finished in just under 20 hours using an instance having 244GB of RAM.
The resulting ortho seems to include approx 20-30% of the entire area of images that was taken and I’m hoping that by providing the full log file and resulting image, someone may have some advice. If I can provide any other files or information to help, please let me know.
This next image shows shows a POINT where each image was taken (left), an image from output of ODM in MeshLab (middle) and the resulting ortho (right).
I have a smaller dataset (having 900 images) for a very similar type of area which I’m using to test min-num-features of 12000 to see if I get a better result.
We are also going to start testing with ODM clustering to split projects.