Can't evaluate accuracy of a calibration

[jessicalfr]

I performed the calibration of 3 câmeras without any problems, and now I'm trying to evaluate the accuracy of the calibration with a new set of images. Initially I followed the instructions setting the input_path as alt (the folder with new set of images), but I got the following error:

$ multical calibrate --boards charuco_16x22.yaml --input_path alt --calibration calibration.json --fix_intrinsic --fix_camera_poses
usage: multical [-h] {calibrate,intrinsic,boards,vis} ...
multical: error: unrecognized arguments: --input_path alt

So I figured the argument was wrong, once that input_path is not a listed argument: in $ multical calibrate --help.

So I tried using this command multical calibrate --boards charuco_16x22.yaml --image_path alt --calibration calibration.json --fix_intrinsic --fix_camera_poses which gave me a set of errors like these (one for each image):

Traceback (most recent call last):
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/threading.py", line 21, in __call__
    result = self.__callable(*args, **kwargs)
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/image/detect.py", line 14, in load_image
    assert path.isfile(filename), f"load_image: file {filename} does not exist"
AssertionError: load_image: file /alt/alt/cam0/image01.jpg does not exist

The function is looking for the images in the alt/alt/ folder, but I specified alt. In the error above, the right path would be alt/cam0/image01.jpg. It looks like a bug to me.

[jessicalfr]

I'm using multical 0.2.2, opencv-python 4.6.0.66, and python 3.10.6 in Ubuntu 22.04.1 LTS.

[huntkao]

Does it work by simply making symbol link to alt/alt/ folder?

[jessicalfr]

When I move the images to the alt/alt/folder, I get a different error:

$ multical calibrate --boards charuco_16x22.yaml --image_path alt --calibration calibration.json --fix_intrinsic --fix_camera_poses
INFO - Using boards:
INFO - charuco_16x22 CharucoBoard {type='charuco', aruco_dict='4X4_1000', aruco_offset=0, size=(16, 22), num_ids=176, marker_length=0.0085, square_length=0.011, aruco_params={}}
Traceback (most recent call last):
  File "/home/jessica/.local/bin/multical", line 8, in <module>
    sys.exit(cli())
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/app/multical.py", line 28, in cli
    run_with(Multical)
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/config/arguments.py", line 73, in run_with
    return program.app.execute()
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/app/multical.py", line 24, in execute
    return self.command.execute()
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/app/calibrate.py", line 21, in execute
    calibrate(self)
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/app/calibrate.py", line 34, in calibrate
    camera_images = find_camera_images(args.paths.image_path, 
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/config/runtime.py", line 39, in find_camera_images
    image_names, filenames = find_images(camera_paths, extensions=extensions)
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/image/find.py", line 44, in find_images_matching
    image_names = find_matching_files(camera_dirs, extensions)
  File "/home/jessica/.local/lib/python3.10/site-packages/multical/image/find.py", line 22, in find_matching_files
    return natsorted(set.intersection(*[set(files) for files in camera_files.values()]))
TypeError: unbound method set.intersection() needs an argument

[Mabroukiimen]

Hello Jessica, can you please tell me what's exactly the command that you wrote to perform calibration ? this is the way I write the command: multical calibrate --cameras C11139,C11140,C11141,C11458,C11459,C11461,C11462,C11463
with : C11139,C11140,C11141,C11458,C11459,C11461,C11462,C11463 are the name of my cameras but it gives me this error: ValueError: mutable default <class 'multical.config.arguments.PathOpts'> for field paths is not allowed: use default_factory