---
license: mit
language:
- en
tags:
- stylegan2-ada
- synthetic-data
- industrial-ai
- generative
- computer-vision
- object-detection
- defect-detection
- yolov8
- fingerprint
datasets:
- LukasMoravansky/Synth-Eye-GAN-Data
---

# Synth.Eye GAN

<p align="center">
  <img src="images/Logo_White.png" alt="Synth.Eye GAN" width="480"/>
</p>

Synth.Eye GAN is a data-driven extension of the [Synth.Eye](https://github.com/LukasMoravansky/Synth_Eye) platform. It replaces physics-based Blender rendering with [StyleGAN2-ADA](https://github.com/LukasMoravansky/stylegan2-ada-pytorch) to generate synthetic training images of fingerprint residue on industrial parts, which are used to train YOLO defect detection models for real-time inspection.

---

## Models

| File | Type | Resolution | Description |
|------|------|------------|-------------|
| `front.pkl` | StyleGAN2-ADA generator | 256×256 px | Generates industrial part front-side images |
| `back.pkl` | StyleGAN2-ADA generator | 256×256 px | Generates industrial part back-side images |
| `fingerprint.pkl` | StyleGAN2-ADA generator | 128×128 px | Generates fingerprint residue images |
| `yolov8m_object_detection` | YOLOv8 Medium | imgsz 640 | Detects part orientation — `Cls_Obj_Front_Side` (0), `Cls_Obj_Back_Side` (1) |
| `yolov8m_defect_detection` | YOLOv8 Medium | imgsz 640 | Detects fingerprint residue defects — `Cls_Defect_Fingerprint` (0) |

---

## Workflow

1. **Synthetic data generation** — GAN models generate front-side and fingerprint images. A compositing pipeline blends them with pressure simulation, motion blur, and alpha effects to produce labeled training images.
2. **YOLO training** — Both YOLO models are trained entirely on the synthetic composite dataset.
3. **Real-time inspection** — A PyQt5 desktop application runs both YOLO models live on a Basler camera feed for industrial surface inspection.

---

## Visual Examples

### GAN Output: Real vs. Synthetic

Left: real training photos captured at INTEMAC Research Center. Right: GAN-generated synthetic images from `front.pkl`, `back.pkl`, and `fingerprint.pkl`.

<p align="center">
  <img src="images/real-vs-syth.png" alt="Real vs Synthetic GAN output" width="340"/>
</p>

### YOLO Inference

Dual-model inference on a real industrial part — blue frame: `yolov8m_object_detection` (part orientation), orange box: `yolov8m_defect_detection` (fingerprint residue defect).

<p align="center">
  <img src="images/Yolo.png" alt="YOLOv8 dual-model detection" width="480"/>
</p>

---

## Training Data

| Model | Dataset | Size | Availability |
|-------|---------|------|--------------|
| Front/Back GAN | Proprietary photos from INTEMAC Research Center | ~130 images per side | Not public; cropped versions available on [HF Datasets](https://huggingface.co/datasets/LukasMoravansky/Synth-Eye-GAN-Data) |
| Fingerprint GAN | [SOCOFing](https://www.kaggle.com/datasets/ruizgara/socofing) | 6,000 scanned fingerprint images | Public (Kaggle) |
| YOLO models | Synthetic composites from Dataset_v2 and Dataset_v3 | See [HF Datasets](https://huggingface.co/datasets/LukasMoravansky/Synth-Eye-GAN-Data) | Public |

---

## Architecture

**StyleGAN2-ADA** generators use a custom fork at [LukasMoravansky/stylegan2-ada-pytorch](https://github.com/LukasMoravansky/stylegan2-ada-pytorch), based on the original [NVlabs/stylegan2-ada-pytorch](https://github.com/NVlabs/stylegan2-ada-pytorch).

Fork additions ([changelog](https://github.com/LukasMoravansky/stylegan2-ada-pytorch/blob/main/CHANGES.md)):
- PyTorch 2.x compatibility fix (custom bilinear interpolation for R1 regularization)
- Windows support via `STYLEGAN2_FORCE_REF_IMPL` environment variable
- Training launcher with named configuration presets

**YOLO** models use [Ultralytics YOLOv8 Medium](https://github.com/ultralytics/ultralytics) (≥ 8.4.48).

---

## Usage

### GAN inference (requires the StyleGAN2-ADA fork)

```python
import pickle
import torch

with open("front.pkl", "rb") as f:
    G = pickle.load(f)["G_ema"].cuda()

z = torch.randn(1, G.z_dim).cuda()
c = torch.zeros(1, G.c_dim).cuda()
img = G(z, c)  # (1, 3, 256, 256), range [-1, 1]
```

### YOLO inference

```python
from ultralytics import YOLO

model = YOLO("yolov8m_object_detection")
results = model("image.jpg", imgsz=640)
```

---

## Links

| Resource | Link |
|----------|------|
| GitHub (source) | [LukasMoravansky/Synth_Eye_GAN](https://github.com/LukasMoravansky/Synth_Eye_GAN) |
| Training dataset | [LukasMoravansky/Synth-Eye-GAN-Data](https://huggingface.co/datasets/LukasMoravansky/Synth-Eye-GAN-Data) |
| StyleGAN2-ADA fork | [LukasMoravansky/stylegan2-ada-pytorch](https://github.com/LukasMoravansky/stylegan2-ada-pytorch) |
| Original StyleGAN2-ADA | [NVlabs/stylegan2-ada-pytorch](https://github.com/NVlabs/stylegan2-ada-pytorch) |
| Synth.Eye (predecessor) | [LukasMoravansky/Synth_Eye](https://github.com/LukasMoravansky/Synth_Eye) |

---

## ⚠️ Limitations

- **Small training set**: Front/Back GANs were trained on ~130 real images per side. Output diversity is limited accordingly.
- **Domain-specific**: All models are tuned to a single industrial part type from INTEMAC Research Center. They are not general-purpose generators or detectors.
- **Fingerprint domain gap**: The fingerprint GAN was trained on scanned ink fingerprints (SOCOFing), which differ from optical-camera fingerprint residue on metal surfaces. Expect some visual mismatch relative to the target deployment domain.

---

## License

[MIT](LICENSE)