| |
| """Sanity checks for KPP origin normalization. |
| |
| This is intentionally lightweight: it verifies the shared bbox-center/max-side |
| normalization round trip and catches the old bug where centering at GT origin |
| would make every origin label exactly zero. |
| """ |
|
|
| import os |
| import sys |
|
|
| import numpy as np |
|
|
| sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))) |
|
|
| from dragmesh.utils.kpp_normalization import ( |
| KPP_ORIGIN_NORMALIZATION, |
| bbox_center_scale, |
| denormalize_points, |
| normalize_points, |
| ) |
|
|
|
|
| def main(): |
| bounds_min = np.array([-1.0, -0.5, -0.25], dtype=np.float32) |
| bounds_max = np.array([2.0, 0.75, 1.25], dtype=np.float32) |
| gt_origin = np.array([1.4, -0.2, 0.9], dtype=np.float32) |
|
|
| center, scale = bbox_center_scale(bounds_min, bounds_max) |
| origin_norm = normalize_points(gt_origin, center, scale) |
| origin_roundtrip = denormalize_points(origin_norm, center, scale) |
|
|
| if np.allclose(origin_norm, 0.0): |
| raise AssertionError("KPP origin label collapsed to zero; check normalization center.") |
| if not np.allclose(origin_roundtrip, gt_origin, atol=1e-6): |
| raise AssertionError(f"Round trip failed: {origin_roundtrip} != {gt_origin}") |
|
|
| print(f"OK: {KPP_ORIGIN_NORMALIZATION} round trip passed") |
| print(f"center={center.tolist()} scale={scale:.6f} origin_norm={origin_norm.tolist()}") |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
