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Add proxy eval and skeleton experiment tooling

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# Scoliosis Training Change Log
This file is the single run-by-run changelog for Scoliosis1K training and evaluation in this repo.
Use it for:
- what changed between runs
- which dataset/config/checkpoint was used
- what the resulting metrics were
- whether a run is still in progress
## Conventions
- Add one entry before launching a new training run.
- Update the same entry after training/eval completes.
- Record only the delta from the previous relevant run, not a full config dump.
- For skeleton-map control runs, use plain-text `ScoNet-MT-ske` naming in the notes even though the code class is `ScoNet`.
## Runs
| Date | Run | Model | Dataset | Main change vs previous relevant run | Status | Eval result |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 2026-03-07 | `DRF` | DRF | `Scoliosis1K-drf-pkl-118` | First OpenGait DRF integration on paper `1:1:8` split using shared OpenGait skeleton/PAV path | complete | `58.08 Acc / 78.80 Prec / 60.22 Rec / 56.99 F1` |
| 2026-03-08 | `DRF_paper` | DRF | `Scoliosis1K-drf-pkl-118-paper` | More paper-literal preprocessing: summed/sparser heatmap path, dataset-level PAV normalization, body-prior path refinement | complete | `51.67 Acc / 72.37 Prec / 56.22 Rec / 50.92 F1` |
| 2026-03-08 | `ScoNet_skeleton_118` | ScoNet-MT-ske control | `Scoliosis1K-drf-pkl-118-paper` | Plain skeleton-map baseline on the paper-literal export to isolate DRF vs skeleton-path failure | complete | `38.85 Acc / 61.23 Prec / 46.75 Rec / 35.96 F1` |
| 2026-03-08 | `ScoNet_skeleton_118_sigma8` | ScoNet-MT-ske control | `Scoliosis1K_sigma_8.0/pkl` | Reused upstream/default sigma-8 heatmap export instead of the DRF paper-literal export | complete | `36.45 Acc / 69.17 Prec / 43.82 Rec / 32.78 F1` |
| 2026-03-08 | `ScoNet_skeleton_118_sigma15_bs12x8` | ScoNet-MT-ske control | `Scoliosis1K-drf-pkl-118-sigma15` | Lowered skeleton-map sigma from `8.0` to `1.5` to tighten the pose rasterization | complete | `46.33 Acc / 68.09 Prec / 51.92 Rec / 44.69 F1` |
| 2026-03-09 | `ScoNet_skeleton_118_sigma15_joint8_sharedalign_2gpu_bs12x8` | ScoNet-MT-ske control | `Scoliosis1K-drf-pkl-118-sigma15-joint8-sharedalign` | Fixed limb/joint channel misalignment, used mixed sigma `limb=1.5 / joint=8.0`, kept SGD | complete | `50.47 Acc / 69.31 Prec / 54.58 Rec / 48.63 F1` |
| 2026-03-09 | `ScoNet_skeleton_118_sigma15_joint8_limb4_adamw_2gpu_bs12x8` | ScoNet-MT-ske control | `Scoliosis1K-drf-pkl-118-sigma15-joint8-sharedalign-limb4` | Rebalanced channel intensity with `limb_gain=4.0`; switched optimizer from `SGD` to `AdamW` | complete | `48.60 Acc / 65.97 Prec / 53.19 Rec / 46.41 F1` |
| 2026-03-09 | `ScoNet_skeleton_118_sigma15_joint8_sharedalign_nocut_adamw_1gpu_bs8x8` | ScoNet-MT-ske control | `Scoliosis1K-drf-pkl-118-sigma15-joint8-sharedalign` | Switched runtime transform from `BaseSilCuttingTransform` to `BaseSilTransform` (`no-cut`), kept `AdamW`, reduced `8x8` due to 5070 Ti OOM at `12x8` | training | no eval yet |
| 2026-03-09 | `ScoNet_skeleton_118_sigma15_joint8_sharedalign_nocut_adamw_proxy_1gpu` | ScoNet-MT-ske proxy | `Scoliosis1K-drf-pkl-118-sigma15-joint8-sharedalign` | Fast proxy route: `no-cut`, `AdamW`, `8x8`, `total_iter=2000`, `eval_iter=500`, `test_seq_subset_size=128` | training | no eval yet |
## Current best skeleton baseline
Current best `ScoNet-MT-ske`-style result:
- `ScoNet_skeleton_118_sigma15_joint8_sharedalign_2gpu_bs12x8`
- `50.47 Acc / 69.31 Prec / 54.58 Rec / 48.63 F1`
## Notes
- `ckpt/ScoNet-20000-better.pt` is intentionally not listed here because it is a silhouette checkpoint, not a skeleton-map run.
- `DRF` runs are included because they are part of the same reproduction/debugging loop, but this log should stay focused on train/eval changes, not broader code refactors.
- The long `ScoNet_skeleton_118_sigma15_joint8_sharedalign_nocut_adamw_1gpu_bs8x8` run was intentionally interrupted and superseded by the shorter proxy run once fast-iteration support was added.