added QR_reader project (hacktoberfest2021)

Python/QR_reader/main.py

@@ -0,0 +1,36 @@
+
+import cv2
+from pyzbar import pyzbar
+
+
+def read_code(frame):
+    codes = pyzbar.decode(frame)
+    for code in codes:
+        x, y, w, h = code.rect
+        code_info = code.data.decode('utf-8')
+        cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 2)
+
+        font = cv2.FONT_HERSHEY_DUPLEX
+        cv2.putText(frame, code_info, (x + 6, y - 6), font, 2.0, (255, 255, 255), 1)
+        with open("qr_code_result.txt", mode='w') as file:
+            file.write("Recognized code:" + code_info)
+    return frame
+
+
+def readQR():
+    camera = cv2.VideoCapture(0)
+    ret, frame = camera.read()
+    while ret:
+        ret, frame = camera.read()
+        frame = read_code(frame)
+        cv2.imshow('QR code reader', frame)
+        if cv2.waitKey(1) & 0xFF == 27:
+            break
+    camera.release()
+    cv2.destroyAllWindows()
+
+
+# Press the green button in the gutter to run the script.
+if __name__ == '__main__':
+    readQR()
+

Python/QR_reader/requirements.txt

@@ -0,0 +1,2 @@
+pyzbar==0.1.8
+opencv-python==4.5.3.56

contributors.md

@@ -45,4 +45,4 @@
 * [Siddhant Srivastava](https://github.com/sidsrivastavasks)
 * [Vijay Thkaur](https://github.com/Tiro-rex)
 * [Alankar Singh](https://github.com/alankarartist)
-
+* [Praveen Yadav](https://github.com/pky99)