Update src/ocr_engine.py

src/ocr_engine.py

@@ -1,19 +1,24 @@
 import os
-os.system("apt-get update && apt-get install -y libgl1-mesa-glx")  # ← This is the fix!
-
-import cv2
 import numpy as np
 import pytesseract
 from PIL import Image
 
 def extract_weight_from_image(pil_img):
+    # ✅ Install system lib first (before cv2 is imported)
+    os.system("apt-get update && apt-get install -y libgl1-mesa-glx")
+
+    import cv2  # ✅ delay import until libGL is ready
+
     image = np.array(pil_img.convert("RGB"))
     gray = cv2.cvtColor(image, cv2.COLOR_RGB2GRAY)
     blur = cv2.GaussianBlur(gray, (3, 3), 0)
     _, thresh = cv2.threshold(blur, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)
+
     config = '--psm 7 -c tessedit_char_whitelist=0123456789.'
     data = pytesseract.image_to_data(thresh, config=config, output_type=pytesseract.Output.DICT)
+
     extracted_text = ''.join(filter(lambda x: x in '0123456789.', ''.join(data['text'])))
     confidences = [int(conf) for conf in data['conf'] if conf.isdigit()]
     avg_conf = sum(confidences)/len(confidences) if confidences else 0
+
     return extracted_text.strip(), avg_conf