This guide focuses on QR (Quick Response) Codes and decoding them live with a Raspberry Pi. These codes are absolutely everywhere in our modern world and for great reason. Sharing a lot of similarities to barcodes, but instead of a laser, a camera is used to identify spaces between black and white squares markings. Encoding data this way is incredibly useful and, with machine learning, it has never been easier to decode their secrets.
All scripts dived into here will display decoded QR data live, one will also capture the information into a text file and the final will use specific QR codes to control the GPIO. There are lots of standards and types of QR codes but this system will work with all common types.
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While we get the content ported over into the Tutorial, the attachments for this tutorial are available as a download by clicking on this link.
The first line is a simple method to update all current packages on your computer.
The majority of the next Terminal Commands are installation methods for packages for Python to increase its functionality. Second, third, and fourth are all package installation lines. The third line looks a touch confusing because it actually installs 6 packages all at once. If you are interested in exactly what each package (and about the authors of them) you can find them at | pypi.org |. For instance here is the details on the | python3-pyqt5 | package installed when you run the third line - PyQt5 Ā· PyPI
The final line is a firmware/driver required to make the PiCamera work with the Raspberry Pi. If that loads correctly, your should be able to access the video feed from the camera in OpenCV.
Hello, I dont know how to express how stoked I am to have found this page. I am very new to the Raspberry Pi but have discovered it as a potential solution to something I am working on.
I am running the Latest OS and hoping i dont have to erase and jump back to a previous OS.
When I try to enter pip3 install opencv-contrib-python==4.1.0.25 into the terminal i get an Error message. Any suggestions? If i have to start over with an older OS i.e. āBusterā how do I upload this using a Mac computer?