---
license: apache-2.0
tags:
  - image-segmentation
  - building-footprint
  - remote-sensing
datasets:
  - BONAI
model-index:
  - name: v6_8ch
    results:
      - task:
          type: image-segmentation
        metrics:
          - name: mIoU
            type: miou
            value: 0.5249
---

# Building Footprint Extraction — FootprintNet checkpoints

Checkpoints for the BONAI building-footprint extraction project. Each folder holds the best
checkpoint for one model run. The model family lineage is V0–V3 (ResNet-50 base), V4-Attention
(RegNetY-6.4GF), V5-Attention (18-channel pruned), and V6 (SegFormer mit_b2) which is the current
family.

## Current best model: v6_8ch

| File | Description |
|------|-------------|
| `v6_8ch/best_v6_8ch.pt` | Best checkpoint, 8 input channels, mIoU **0.5249** (TTA 0.5317) |
| `v6_8ch/best_v6_8ch_stripped.pt` | Deployable stripped weights (inference only) |
| `v6_8ch/eval_summary.txt` | Held-out eval metrics |
| `v6_8ch/tta_summary.txt` | HFlip+VFlip TTA comparison |

Best config: `in_channels=8`, SegFormer `mit_b2`, `batch_size=24`, `accum_steps=2`, `lr=3e-5`,
`warmup_epochs=8`, `early_stop_patience=30`, `grad_checkpoint=true`, `amp=true`.

## Model summary

| Folder | Input channels | Epoch | mIoU | Status |
|--------|---------------|-------|------|--------|
| v6_8ch | 8 | 129 | 0.5249 | **Current best** |
| v6_19ch | 19 | 83 | 0.4977 | Deprecated |
| v6_14ch | 14 | 63 | 0.5065 | Deprecated (Phase 69) |
| v6_11ch | 11 | 73 | 0.4958 | Deprecated (Phase 70) |
| v5_attn_1 | 18 | 24 | 0.3867 | Deprecated |
| v5_attn_1_continued | 18 | 35 | 0.4109 | Deprecated |
| v4_attn_retry_p41 | 19 | 23 | 0.4046 | Deprecated |
| v4_attn_synthetic_roof_p44 | 19 | 34 | 0.4025 | Deprecated |
| channel_attention_phase41_earlystop | — | 2 | 0.3864 | Probe (early stop) |
| channel_attention_phase44_earlystop | — | 3 | 0.3713 | Probe (early stop) |