Update app.py

app.py

@@ -4,7 +4,7 @@ def process(image: str, lang: str = 'eng') -> str:
     try:
         img = cv2.imread(image) 
         gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) 
-        threshold_img = cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)[1]
+        threshold_img = cv2.threshold(gray, 127, 255, cv2.THRESH_TOZERO)[1]
         result = pytesseract.image_to_string(threshold_img, lang=lang)
         os.remove(image)
         return result