| --- |
| license: mit |
| tags: |
| - computer-vision |
| - onnx |
| - object-detection |
| - card-detection |
| - collectorvision |
| library_name: onnx |
| --- |
| |
| # ccgdetector-fastweb-single |
|
|
| ONNX corner detector for CollectorVision-style card scanning. This release is **fastweb-single 1.39** (`corndog`), an EfficientViT-B0 global-token SimCC model exported for 384x384 RGB input. |
|
|
| ## Model details |
|
|
| | Property | Value | |
| |---|---| |
| | Architecture | EfficientViT-B0 + global-token SimCC head | |
| | Input | 384×384 RGB, ImageNet-normalized | |
| | Outputs | corners (8 floats, normalized [0,1]), compatibility presence logit, sharpness scalar | |
| | Parameters | ~0.77M | |
| | File size | 3.19 MB (fp32 ONNX, stripped) | |
| | Local CPU speed | 8.4 ms / frame, 119.4 FPS (ONNX Runtime CPU, single thread, 384×384) | |
| | Codename | corndog | |
| | Latest version | 1.39 | |
|
|
| ## Artifact |
|
|
| | File | Notes | |
| |---|---| |
| | `fastweb-single-1.39.onnx` | Versioned stable-available artifact. | |
| | `model.onnx` | Alias for the same file. | |
|
|
| ## Status |
|
|
| This release is available through the CollectorVision **stable** channel for the |
| `fastweb-single` family. Cornelius remains the conservative stable default |
| detector family, while fastweb-single is the smaller/faster stable-available |
| alternative for consumers that explicitly select it. |
|
|
| ## Metrics |
|
|
| Normal eval, selected checkpoint epoch 39: |
|
|
| | metric | value | |
| |---|---:| |
| | validation IoU | 0.953966 | |
| | test IoU | 0.968839 | |
| | validation collapse count | 77 | |
| | test collapse count | 13 | |
|
|
| Full ±50 rotation stress: |
|
|
| | metric | value | |
| |---|---:| |
| | mean IoU | 0.974255 | |
| | p10 IoU | 0.960757 | |
| | bad `<0.5` | 1 | |
| | collapse count | 0 | |
|
|
| ## Comparison with Cornelius |
|
|
| Cornelius 2.12 is the stable conservative default. `fastweb-single` is a smaller |
| and faster stable-available alternative with the same 384×384 input contract and the same |
| three output tensors: `corners`, compatibility `presence`, and `sharpness`. |
|
|
| | Model | Channel | Normal test IoU | Normal collapse | Full ±50° mean / p10 IoU | Full-rotation bad / collapse | ONNX size | Params | Local CPU speed | |
| |---|---|---:|---:|---:|---:|---:|---:|---:| |
| | Cornelius 2.12 | stable | **0.968911** | 18 | 0.970411 / 0.954621 | **0 / 0** | 4.41 MB | 1.05M | 23.2 ms / 43.0 FPS | |
| | fastweb-single 1.39 | stable + testing | 0.968839 | **13** | **0.974255 / 0.960757** | 1 / 0 | **3.19 MB** | **0.77M** | **8.4 ms / 119.4 FPS** | |
|
|
| Takeaways: |
|
|
| - Normal accuracy is effectively tied: fastweb-single trails Cornelius by |
| 0.000072 IoU on the normal held-out test. |
| - fastweb-single is about 28% smaller on disk and about 2.8× faster in the |
| local single-thread CPU benchmark. |
| - fastweb-single has stronger rotation-stress mean and p10 IoU, but still has |
| one remaining bad rotation-stress case where Cornelius has zero. |
| - The current published ONNX uses argmax SimCC decoding. Local experiments with |
| parabolic peak refinement showed small gains, but that refinement is not baked |
| into this artifact. |
|
|
| Speed benchmark details: ONNX Runtime 1.24.4, CPUExecutionProvider, |
| `intra_op_num_threads=1`, `inter_op_num_threads=1`, 50 warmup runs and 300 timed |
| runs on a 384×384 float32 input. These numbers are intended for model-to-model |
| comparison on the same machine, not as universal device benchmarks. |
|
|
| ## Outputs |
|
|
| - **corners** — 8 floats `[x0,y0, x1,y1, x2,y2, x3,y3]` in TL→TR→BR→BL order, normalized [0,1] |
| - **presence** — compatibility logit. For this release it is a constant `1.0`; prefer the sharpness gate. |
| - **sharpness** — mean peak of the 8 SimCC softmax distributions; use this for card-present gating. |
|
|
