first "working" version of the barcode scanner

camera_test.py

@@ -0,0 +1,49 @@
+from imutils.video import VideoStream
+from pyzbar import pyzbar
+import argparse
+import datetime
+import imutils
+import time
+import cv2
+
+ap = argparse.ArgumentParser()
+ap.add_argument("-o", "--output", type=str, default="barcodes.csv",
+help="path to output CSV file containing barcodes")
+args = vars(ap.parse_args())
+vs = VideoStream(src=0).start()  #Uncomment this if you are using Webcam
+#vs = VideoStream(usePiCamera=True).start() # For Pi Camera
+time.sleep(2.0)
+csv = open(args["output"], "w")
+found = set()
+
+while True:
+    frame = vs.read()
+    frame = imutils.resize(frame, width=400)
+    barcodes = pyzbar.decode(frame)
+    for barcode in barcodes:
+        (x, y, w, h) = barcode.rect
+        cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 0, 255), 2)
+        barcodeData = barcode.data.decode("utf-8")
+        barcodeType = barcode.type
+        text = "{} ({})".format(barcodeData, barcodeType)
+        print (text)
+        cv2.putText(frame, text, (x, y - 10),
+        cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)
+
+# if the barcode text is currently not in our CSV file, write
+# the timestamp + barcode to disk and update the set
+        if barcodeData not in found:
+            csv.write("{},{}\n".format(datetime.datetime.now(),
+            barcodeData))
+            csv.flush()
+            found.add(barcodeData)
+            cv2.imshow("Barcode Reader", frame)
+            key = cv2.waitKey(1) & 0xFF
+
+# if the `s` key is pressed, break from the loop
+            if key == ord("s"):
+                break
+                print("[INFO] cleaning up...")
+                csv.close()
+                cv2.destroyAllWindows()
+                vs.stop()