Add landmark_asymmetry for a per-frame L/R facial asymmetry score - #375
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cindysteward wants to merge 1 commit into
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Add landmark_asymmetry for a per-frame L/R facial asymmetry score#375cindysteward wants to merge 1 commit into
cindysteward wants to merge 1 commit into
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Adds a facial asymmetry metric using the MediaPipe landmark model.
Motivated by the fact that (clinical) facial motor assessment (e.g., stroke, facial palsy, neurological deficit) often relies on a left/right comparison. Py-feat currently has no built-in metric for
this.
The module reuses the existing canonical mesh mirror map from feat.utils.region_maps. Exposed as Fex.landmark_asymmetry, returns 0 for a perfectly symmetric face, normalised by interocular distance so scores are comparable across subjects/distances.
Tests added in feat/tests/test_landmark_asymmetry.py.