| { | |
| "schema_version": "1.2.1", | |
| "job_id": "qv_walking_sample_v1", | |
| "sequence": { | |
| "frame_count": 80, | |
| "action_label": "walking", | |
| "avg_landmark_visibility": 0.770697, | |
| "hip_center_displacement_mean_norm": 0.014724, | |
| "hip_center_path_sum_norm": 1.163219, | |
| "inter_frame_steps": 79, | |
| "velocity_proxy_available": true, | |
| "velocity_mean": 0.014724, | |
| "velocity_std": 0.010937, | |
| "velocity_cv_raw": 0.742789, | |
| "hip_velocity_smooth_window": 3, | |
| "velocity_mean_smoothed": 0.014721, | |
| "velocity_std_smoothed": 0.008312, | |
| "velocity_cv_smoothed": 0.564646, | |
| "velocity_cv_mad": 0.394393, | |
| "motion_consistency_cv_smoothed": 0.435354, | |
| "motion_consistency_mad": 0.605607, | |
| "motion_consistency_blend_cv_weight": 0.65, | |
| "short_sequence_motion_warning": false, | |
| "acceleration_mean": 0.008273, | |
| "avg_stride_length": 0.038663, | |
| "body_height_norm": 0.351658, | |
| "arm_swing_amplitude": 0.086108, | |
| "step_frequency": 24.6875, | |
| "motion_consistency": 0.494943, | |
| "motion_consistency_method": "blend_smoothed_cv_mad_v1" | |
| }, | |
| "notes": "norm = image-normalized coordinates (0–1); x/y clamped at export. Hip displacement is Euclidean distance in normalized space between consecutive exported frames. motion_consistency blends (1) stability of CV on a short moving-average of step lengths (reduces pose jitter) and (2) a robust MAD/median term (less harsh than raw std/mean on periodic gait). Raw velocity_cv can still be high for natural walking; prefer smoothed + MAD components. short_sequence_motion_warning=true when inter_frame_steps is below the configured threshold — sequence-level quality is less reliable for imitation learning. For higher motion_consistency in exports: lower stride, longer clips, walking_focused preset, temporal smoothing on accepted frames. stride_length = mean horizontal ankle separation per frame. body_height_norm = mean |nose.y − mid(ankles).y|. step_frequency ≈ hip displacement steps per second of source timeline." | |
| } |