BVHsmooth

Apply smoothening filters to an animation in BVH format.

Usage

To smoothen the rotations of the animation run:

python code/smooth_rotation.py -i <input_file> -o <output_file> --filter <filter> <params>

To smoothen the positions of the animation run:

python code/smooth_position.py -i <input_file> -o <output_file> --filter <filter> <params>

Filters:

Butterworth (frquency domain)

--filter butterworth --border <border> --u0 <u0> --order <order>

Central Moving Average (time domain)

--filter average -m <m>

Gaussian (frquency domain) - Not recomended, poor results.

--filter gaussian --border <border> --sigma <sigma>

Example

You can see the results using BVH Player.

Let's use the provided sample BVH file bvh_files/sample01.bvh. The sample file was created by kinect capture method at CENA (Centro de Tecnologias Narrativas) laboratory, located at the Insituto Politécnico (IPRJ/UERJ).

First, apply the smoothening in rotations:

python code/smooth_rotation.py -i bvh_files/sample01.bvh -o bvh_files/out.bvh --filter butterworth --border 100 --u0 60 --order 2

Then, apply the smoothening in positions:

python code/smooth_position.py -i bvh_files/out.bvh -o bvh_files/out.bvh --filter butterworth --border 100 --u0 60 --order 2

Now you can compare the files bvh_files/sample01.bvh and bvh_files/out.bvh.