YOLOv8 Object Counting in Real-time with Webcam, OpenCV and Supervision

Curious about how to build an application capable of detecting objects on a camera stream in real time? You are in the right place! Together we will learn how to access the webcam using OpenCV, detect objects with YOLOv8, and count them with Supervision.

Chapters:

0:00 Introduction
0:38 Webcam inference with YOLOv8 CLI
02:12 Accessing webcam with OpenCV
07:05 Webcam inference with YOLOv8 SDK
08:25 Drawing bounding boxes
10:05 Using polygon zones to count detections
14:28 Eliminating double detections with agnostic NMS
16:07 Few extra tricks
18:59 Conclusion

Resources:

[pcsolutionsezcloudsystems]

I get this error: "...too many values to unpack (expected 4)" pointing inside the labels array. Why am I getting this error this error? What should I do to fix it? :)

pip list: ...numpy 1.24.2, torch 2.0.0, torchvision 0.15.1, ultralytics 8.0.82, supervision 0.6.0

[onyekaokonji]

Your content has become the best content I've watched on YT in a while and I love the Supervision package, it's making my work easier. Thanks

[SphinxKingStone]

omg thank you so much, everyone is using yolo on it's own and not with OpenCV and that's exactly what I needed

[MedexRND]

Hello sir,
How can I develop real-time webcam functionality using a dataset I've created?

[amirsabbagh]

When the number of objects increases, my model does not display the label format that I specified and only displays the object code, how can I display the specified label in any case?

[qqhmovo]

it was great to see how easy is it to remove a class from detections! Great job @roboflow!😁

[aaronfoo]

what changes do i need to make if I were to use Raspberry Pi 4 + Raspberry Camera?

[deepakkarmaDK]

i am getting this error
AttributeError: module 'supervision' has no attribute 'BoxAnnotator'

[vickyfikriachri]

Thanks for your complete step by step coding video. Kinna like it. I followed yolo since v3, but never know we can filter out hand or other unrelated object to be detected

[phamtienthinh]

It's so cool, thank you for showing basic function to work with YOLO, i'm having a small task that required learning object detection and I was frustrated to find some tutorial, this was really a big help

[talhanadeem]

I am using a windows 11 and it doesn't show me the webcam only the terminal in vscode

[wishnu]

Hi, your video is great. I've been using your code with my own model to count bacteria inside the zone and it works perfectly! Thank you for sharing the knowledge.

[lphonehacks]

how do you create a virtual environment at 00:45? on my end it says invalid syntax

[danielmeshulam]

thank you for this video! very helpful.
but i am a problem. the line "import cv2" in not identified what should i do?

[ThongMr]

Hello Amin! I get the error: AttributeError: type object 'Detections' has no attribute 'from_yolov8''

[gisanimrahma]

Hi, thank you for the tutorial. I'm working on my project right now and it helps me a lot. But this project require me to know the fps, is there a way to show it?

[kiangg]

Is it possible to do multiple polygon zones inside 1 frame?

[AdityaSingh-hmky]

hi, the pre trained model that u used how can we use if i want to train a custom dataset and then use it? like how to use it for model trained on custom dataset on collab but i want to detect in real time how to get that? can i download the already trained model on collab on my pc?

[boskobuha]

If I have remote camera on hill and I am monitoring wildfire how to get alert from camera and is it possible to work? What i need of equipment?

[UZMAALFATMI]

Well explained @Peter. Useful and informative video that can cover multiple use-cases. Thanks a lot!