Comments on: Set Up USB Camera for OpenCV Projects with Raspberry Pi https://randomnerdtutorials.com/set-up-usb-camera-opencv-raspberry-pi/ Learn ESP8266, ESP32, Arduino, and Raspberry Pi Fri, 31 May 2024 14:00:49 +0000 hourly 1 https://wordpress.org/?v=6.6.1 By: James Tervit https://randomnerdtutorials.com/set-up-usb-camera-opencv-raspberry-pi/#comment-920216 Fri, 31 May 2024 14:00:49 +0000 https://randomnerdtutorials.com/?p=146115#comment-920216 Hi Rui, installed all great on Bookworm 64bit, shows the camera which has very low latency, so all good.

Just one error python opencv_test_usb_camera.py
qt.qpa.plugin: Could not find the Qt platform plugin “wayland” in “/home/myname/Desktop/projects/projectsenv/lib/python3.11/site-packages/cv2/qt/plugins”

]]> By: Berger Luc https://randomnerdtutorials.com/set-up-usb-camera-opencv-raspberry-pi/#comment-910555 Sun, 28 Apr 2024 09:50:04 +0000 https://randomnerdtutorials.com/?p=146115#comment-910555 In reply to Toni.

Toni, doing exactly that, but helas the OCR give results with strange results, without being consistently same error.
I will be pleased to share my code:
luc -dot- berger -at- gmail -dot- com

]]> By: Luc Berger https://randomnerdtutorials.com/set-up-usb-camera-opencv-raspberry-pi/#comment-910226 Sat, 27 Apr 2024 15:14:22 +0000 https://randomnerdtutorials.com/?p=146115#comment-910226 Toni, doing exactly that, but helas the OCR give results with strange results, without being consistently same error.
I will be pleased to share my code:
luc -dot- berger -at- gmail -dot- com

]]> By: Rui Santos https://randomnerdtutorials.com/set-up-usb-camera-opencv-raspberry-pi/#comment-901669 Thu, 28 Mar 2024 14:02:39 +0000 https://randomnerdtutorials.com/?p=146115#comment-901669 In reply to Toni.

Hello Toni!
It’s definitely possible to do something like that, but I don’t have any tutorial planned for that exact topic.

Thank you for the suggestion!
Rui

]]> By: Toni https://randomnerdtutorials.com/set-up-usb-camera-opencv-raspberry-pi/#comment-901619 Thu, 28 Mar 2024 09:50:48 +0000 https://randomnerdtutorials.com/?p=146115#comment-901619 Hello Ruiz,

thank you very much for covering USB-cams on the Pi.

Im using them for years taking meter readings (gas, electricity and water) using the tools provided by the OS-version used, so not using OpenCV.

However, so far I was not able to manage to optically grab the actual meter readings, as numbers.

Some folks claim to get it work using

“ESP32-Cam on your water meter with “AI-on-the-edge” — also for gas and power meters”

Well, if that`s the case, a Pi using OpenCV and Tesseract should do it as well. However, each kind of meter-displays have there own difficulties, especially water meters. Gas-Meters are best, then electric meter (Ferraris-Type), water-meters are the worst.

Many Gas-Meters have a pulse count, so you could use it (however the actual reading is preferrable). Ferraris-Counter could be equipped with a puls count also.

So a working Pi project for meter reading would be just great.

Thanks

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