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ronshnapp / MyPTV

MyPTV is an open source library designed for 3D particle Tracking (3D-PTV) measurements
MIT License
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Error in stitching step in 2D tracking #34

Closed yukeli1993 closed 1 year ago

yukeli1993 commented 1 year ago

When doing stitching step after 2D_tracking steps, error comes out as:

given inputs - params file name: params_file.yml action: stitching

starting at 60 trajectories with 63.7 samples per trajectory on average

searching for candidates to connect: Traceback (most recent call last): File "workflow.py", line 1028, in wf = workflow(fname, action) File "workflow.py", line 93, in init self.do_stitching() File "workflow.py", line 926, in do_stitching ts.stitch_trajectories() File "C:\ProgramData\Anaconda3\lib\site-packages\myptv\traj_stitching_mod.py", line 368, in stitch_trajectories self.calc_dij() File "C:\ProgramData\Anaconda3\lib\site-packages\myptv\traj_stitching_mod.py", line 161, in calc_dij v = gradient(x, axis=0) File "<__array_function__ internals>", line 6, in gradient File "C:\ProgramData\Anaconda3\lib\site-packages\numpy\lib\function_base.py", line 1065, in gradient "Shape of array too small to calculate a numerical gradient, " ValueError: Shape of array too small to calculate a numerical gradient, at least (edge_order + 1) elements are required.

I guess it may relate to the disagreement between 3D and 2D stitching or improper setting parameters. Here I set them as:

stitching: trajectory_file: trajectories_2D max_time_separation: 3 max_distance: 5 save_name: trajecotries_stitched

yukeli1993 commented 1 year ago

Solved Sorry, it is my fault. The trajectories_file should be smoothed_trajectories.