# 🧠 ClipSegMultiClass

Multiclass semantic segmentation using CLIP + CLIPSeg.  
Fine-tuned version of [`CIDAS/clipseg-rd64-refined`](https://huggingface.co/CIDAS/clipseg-rd64-refined)  
Supports multiple classes in a single forward pass.

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## 🔬 Model

**Name:** [`BioMike/clipsegmulticlass_v1`](https://huggingface.co/BioMike/clipsegmulticlass_v1)  
**Repository:** [github.com/BioMikeUkr/clipsegmulticlass](https://github.com/BioMikeUkr/clipsegmulticlass)  
**Base:** `CIDAS/clipseg-rd64-refined`  
**Classes:** `["background", "Pig", "Horse", "Sheep"]`  
**Image Size:** 352×352  
**Trained on:** OpenImages segmentation subset (custom fruit/animal dataset)

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## 📊 Evaluation

| Model                        | Precision | Recall  | F1 Score | Accuracy |
|-----------------------------|-----------|---------|----------|----------|
| CIDAS/clipseg-rd64-refined  | 0.5239    | 0.2114  | 0.2882   | 0.2665   |
| BioMike/clipsegmulticlass_v1| 0.7460    | 0.5035  | 0.6009   | 0.6763   |

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## 🎮 Demo

👉 Try it online:  
[Hugging Face Space 🚀](https://huggingface.co/spaces/BioMike/clipsegmulticlass)

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## 📦 Usage

```python
from PIL import Image
import torch
import matplotlib.pyplot as plt
import numpy as np
from model import ClipSegMultiClassModel
from config import ClipSegMultiClassConfig

# Load model
model = ClipSegMultiClassModel.from_pretrained("trained_clipseg_multiclass").to("cuda").eval()
config = model.config  # contains label2color

# Load image
image = Image.open("pigs.jpg").convert("RGB")

# Run inference
mask = model.predict(image)  # shape: [1, H, W]

# Visualize
def visualize_mask(mask_tensor: torch.Tensor, label2color: dict):
    if mask_tensor.dim() == 3:
        mask_tensor = mask_tensor.squeeze(0)

    mask_np = mask_tensor.cpu().numpy().astype(np.uint8)  # [H, W]
    h, w = mask_np.shape
    color_mask = np.zeros((h, w, 3), dtype=np.uint8)

    for class_idx, color in label2color.items():
        color_mask[mask_np == class_idx] = color

    return color_mask

color_mask = visualize_mask(mask, config.label2color)

plt.imshow(color_mask)
plt.axis("off")
plt.title("Predicted Segmentation Mask")
plt.show()