Add code for Text Detection

+"""Detects text in the file."""
+from google.cloud import vision
+
+import io
+import os
+
+os.environ["GOOGLE_APPLICATION_CREDENTIALS"]="C:/Users/User/Downloads/SmokeDetection-ab1773dcbc6a.json"
+client = vision.ImageAnnotatorClient()
+path = 'D:/Curricular/5-2/CapstoneDesign2/git/Prj/test01.jpg'
+
+with io.open(path, 'rb') as image_file:
+    content = image_file.read()
+
+image = vision.Image(content=content)
+
+price_candidate = []
+card_number_candidate = []
+date_candidate = []
+
+response = client.text_detection(image=image)
+texts = response.text_annotations
+print('Texts:')
+
+for text in texts:
+    content = text.description
+    content = content.replace(',','')
+    print('\n"{}"'.format(content))
+
+
+if response.error.message:
+    raise Exception(
+        '{}\nFor more info on error messages, check: '
+        'https://cloud.google.com/apis/design/errors'.format(
+            response.error.message))