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Figure 2
An example of QR code decoding using the webcam. The top image is as captured using OpenCV. The focus of the camera has been adjusted with the best effort. The bottom image is after preprocessing using Gaussian adaptive thresholding. Even though the original image is probably over exposed and not in sharp focus, the two QR codes are successfully decoded. The image size is 1280 × 400 pixels. The red boxes in the bottom image are the polygons returned by pyzbar.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 4| July 2021| Pages 1237-1244
https://doi.org/10.1107/S160057752100521X
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