Fix HOTA overall aggregation#209
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cheind merged 1 commit intoJul 10, 2026
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Summary
Fixes the OVERALL aggregation for HOTA-family metrics so py-motmetrics combines sequences the same way TrackEval does.
The previous merge functions averaged per-sequence deta_alpha, assa_alpha, and hota_alpha directly. TrackEval instead sums detection counts for DetA, weights association accuracy by true positives/detections, and recomputes HOTA = sqrt(DetA * AssA) from those aggregate values.
This PR updates deta_alpha_m, assa_alpha_m, and hota_alpha_m, and adds combined-sequence TUD fixture regression coverage.
It also moves the optional xmltodict import into load_detrac_xml, so MOT-only tests do not require the DETRAC XML dependency at import time.
Hopefully this fix the HOTA issues once and for all 😄
Validation
I also checked the py-motmetrics bundled TUD fixtures against BoxMOT’s bundled TrackEval implementation; combined and per-sequence HOTA, DetA, and AssA matched exactly.