Update ocr_engine.py

ocr_engine.py

@@ -1,36 +1,44 @@
 from transformers import TrOCRProcessor, VisionEncoderDecoderModel
-from PIL import Image
+from PIL import Image, ImageFilter
 import torch
 import re
 
-# Load model and processor
+# Load TrOCR model
 processor = TrOCRProcessor.from_pretrained("microsoft/trocr-base-handwritten")
 model = VisionEncoderDecoderModel.from_pretrained("microsoft/trocr-base-handwritten")
 
 def clean_ocr_text(text):
     print("[RAW OCR]", text)
-    text = text.replace(",", ".").replace("s", "5").replace("o", "0").lower()
-    text = re.sub(r"[^\d\.kg]", "", text)
+    # Fix common misreads
+    text = text.replace(",", ".").replace("s", "5").replace("o", "0").replace("O", "0")
+    text = re.sub(r"[^\d\.kg]", "", text.lower())  # Keep digits, dot, kg
     print("[CLEANED OCR]", text)
     return text
 
+def preprocess_image(image):
+    # Enlarge + sharpen for better OCR
+    image = image.resize((image.width * 2, image.height * 2), Image.BICUBIC)
+    image = image.filter(ImageFilter.SHARPEN)
+    return image
+
 def extract_weight(image):
     try:
+        image = preprocess_image(image)
         pixel_values = processor(images=image, return_tensors="pt").pixel_values
         generated_ids = model.generate(pixel_values)
         raw_text = processor.batch_decode(generated_ids, skip_special_tokens=True)[0].strip()
 
         cleaned = clean_ocr_text(raw_text)
 
-        # First try with unit
-        match = re.search(r'(\d{1,5}(?:\.\d{1,3})?)\s*(kg|g)', cleaned)
+        # Try matching decimal weight with unit
+        match = re.search(r'(\d{1,3}\.\d{1,3})\s*(kg|g)', cleaned)
         if match:
             return f"{match.group(1)} {match.group(2)}"
 
-        # Fallback: only number, assume grams
-        fallback = re.search(r'(\d{1,5}(?:\.\d{1,3})?)', cleaned)
+        # Fallback: match only decimal number
+        fallback = re.search(r'(\d{1,3}\.\d{1,3})', cleaned)
         if fallback:
-            return f"{fallback.group(1)} g"
+            return f"{fallback.group(1)} g"  # Default to grams
 
         return f"No valid weight found | OCR: {cleaned}"
     except Exception as e: