Update README.md
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README.md
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@@ -48,102 +48,6 @@ It uses a CTC head so it can handle variable-length text without needing segment
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```bash
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pip install torch torchvision pillow
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```
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### Option A โ using `model.pt` (state_dict)
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```python
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import torch
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import torch.nn as nn
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import numpy as np
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from PIL import Image
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from huggingface_hub import hf_hub_download
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# โโ 1. Model definition โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
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class KhmerOCR_DTWG(nn.Module):
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def __init__(self, num_chars, hidden_size=256):
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super().__init__()
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self.cnn = nn.Sequential(
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self._conv(1, 32), nn.MaxPool2d(2, 2),
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self._conv(32, 64), nn.MaxPool2d(2, 2),
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self._conv(64, 128),
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self._conv(128, 128),
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nn.MaxPool2d((2, 1), (2, 1)),
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self._conv(128, 256),
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self._conv(256, 256),
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nn.MaxPool2d((4, 1), (4, 1)),
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)
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self.lstm1 = nn.LSTM(256, hidden_size, bidirectional=True, batch_first=True)
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self.fc1 = nn.Linear(hidden_size * 2, hidden_size)
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self.lstm2 = nn.LSTM(hidden_size, hidden_size, bidirectional=True, batch_first=True)
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self.fc = nn.Linear(hidden_size * 2, num_chars + 1)
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def _conv(self, i, o):
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return nn.Sequential(
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nn.Conv2d(i, o, 3, 1, 1, bias=False),
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nn.BatchNorm2d(o),
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nn.ReLU(inplace=True),
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)
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def forward(self, x):
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x = self.cnn(x)
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x = x.squeeze(2).permute(0, 2, 1)
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x, _ = self.lstm1(x)
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x = torch.relu(self.fc1(x))
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x, _ = self.lstm2(x)
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x = self.fc(x)
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return x.permute(1, 0, 2)
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# โโ 2. Vocabulary โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
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TOKENS = (
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"0123456789"
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"แแแแแแ
แแแแแแแแแแแแแแแแแแแแแแแแแแแ แกแขแฃแคแฅแฆแงแฉแชแซแฌแญแฎแฏแฐแฑแฒแณ"
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"แถแทแธแนแบแปแผแฝแพแฟแแแแแแ
แแแแแแแแแแแแแแแแแแแแ"
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"แ แกแขแฃแคแฅแฆแงแจแฉแณ"
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"!@#$%^&*()-_=+[]{};:'\",.<>?/|\\ "
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)
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NUM_CHARS = len(TOKENS)
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idx2char = {i + 1: c for i, c in enumerate(TOKENS)}
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# โโ 3. Load model โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
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device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
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weights_path = hf_hub_download(repo_id="phonsobon/mini-ocr", filename="model.pt")
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model = KhmerOCR_DTWG(NUM_CHARS).to(device)
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model.load_state_dict(torch.load(weights_path, map_location=device))
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model.eval()
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# โโ 4. Helpers โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
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def load_image(path):
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img = Image.open(path).convert("L")
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w, h = img.size
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new_w = int(w / h * 32)
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img = img.resize((new_w, 32))
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img = np.array(img, dtype=np.float32) / 255.0
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return torch.tensor(img).unsqueeze(0).unsqueeze(0) # (1, 1, 32, W)
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def ctc_decode(logits):
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preds = torch.argmax(logits, dim=2)[:, 0].cpu().numpy()
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prev, text = -1, []
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for p in preds:
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if p != prev and p != 0:
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text.append(idx2char.get(p, ""))
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prev = p
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return "".join(text)
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# โโ 5. Inference โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
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img = load_image("your_image.png").to(device)
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with torch.no_grad():
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logits = model(img)
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result = ctc_decode(logits)
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print("OCR result:", result)
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```
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### Option B โ TorchScript (no class needed)
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```python
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import torch
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import numpy as np
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```bash
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pip install torch torchvision pillow
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```
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```python
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import torch
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import numpy as np
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