[Python] How can I detect duplicate barcodes in an image using Python, Pyzbar, and OpenCV?

I’m working with Python, Pyzbar, and OpenCV to read multiple barcodes from a single image. I’d like to detect if any barcodes appear more than once in that image. What’s the best way to approach this? Are there recommended techniques for scanning the image, extracting each barcode value, and then identifying duplicates? Any sample code or pointers would be greatly appreciated.

for barcode in barcodes:
barcode_data = barcode.data.decode("utf-8")
points = np.array(barcode.polygon, np.int32)
points = points.reshape((-1, 1, 2))

Continue reading...