All Questions
41 questions
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142
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Improving sphere detection in a bearing with opencv
Via a USB microscope on a RPI4,
I'm trying to check how many balls are on the image.
I'm trying with the HoughCircles solution and I have some results with tuning the parameters.
But I'm wondering if ...
- 11
-1
votes
1
answer
240
views
Capturing video using raspberry pi with 64 bit OS
I tried capturing video using Raspberry Pi 4 Model B 8GB RAM and OS of 64 bit. But unable to capture a video due to c2 error. Along with that I'm having no camera in interface option so I updated then ...
1
vote
0
answers
1k
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ERROR: Could not build wheels for opencv-python, which is required to install pyproject.toml-based projects
I expected to download opencv-python on Raspberry PI 4, but found this issue.
pi@raspberrypi:~ $ pip3 install opencv-python
Defaulting to user installation because normal site-packages is not ...
- 11
0
votes
1
answer
558
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Can't receive frame Opencv Python Raspberry Pi
I am working on Raspberry Pi 4 with the latest os VERSION="12 bookworm" and a Raspberry Pi camera Rev1.3.
I want to use this pi camera to capture video useing opencv.
Issue: I getting error ...
0
votes
0
answers
85
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How do I install opencv on my Raspberry Pi 4 properly?
I kept getting this error.
ImportError: /usr/local/lib/python3.9/dist-packages/cv2/cv2.abi3.so: undefined symbol: __atomic_store_8
I've checked the python and opencv installed on my raspberry pi and ...
- 1
0
votes
1
answer
141
views
How can I decrease the latency while recording rtsp stream in raspberrypi 4b?
I have an ipcam which using rtsp protocol through ethernet, and the decode format is h.264.When I record the rtsp video, the latency was about 1~2sec.
Spec:raspberrypi 4b/RAM 8gb/SDcard 32GB A1
python ...
- 1
0
votes
0
answers
130
views
Webstreaming ERROR from OpenCV when streaming with flask in Raspberry Pi
I want to stream on the website using Raspberry Pi, Pi Camera, flask and OpenCV.
So I wrote the streaming code.
from flask import Flask, render_template, Response
import cv2
app = Flask(__name__)
...
0
votes
0
answers
56
views
Raspberry image detection code error: error: (-215:Assertion failed) !ssize.empty() in function 'resize'
I'm doing a project on object and animal recognition with Raspberry Pi 4 Model B. All the libraries are set and the camera is ready but I get the following error:
error: (-215:Assertion failed) !ssize....
0
votes
0
answers
150
views
openCV moveWindow, not moving
I've connected two USB cameras to a Raspberry Pi4. Using OpenCV I'm able to stream the videos from both cameras simultaneously, however I'd like to position the video windows in a specific location on ...
-1
votes
1
answer
1k
views
Yolov8 on Raspberry Pi model 4B 64 bit OS
I am trying to run a yolov8 model on my Raspberry Pi and have installed ultralytics using pip3 install ultralytics command. But whenever I try to import YOLO in Thonny using from ultralytics import ...
0
votes
0
answers
594
views
Can't install Opencv on raspberry pi 4
I'm using the raspberry pi 4 on visual studio code and whenever I enter the command pip install opencv-python in the terminal, after 40 mins I get the error message
FileNotFoundError: [Errno 2] No ...
- 13
1
vote
0
answers
433
views
Unable to change exposure settings for CSI Pi Camera on Raspberry Pi 64 bit Bullseye
Tried varying the expsoure settings for the Pi CSI based camera using libcamera library in python.
Tried out multiple methods which did not lead to successful implementation.
Unable to vary exposure ...
- 13
0
votes
1
answer
475
views
Can't open camera by index on Raspberry-pi4
So, i installed the official Raspberry-pi OS "Raspberry pi OS Lite 64" and installed OpenCV.
But when trying to call cv2.VideoCapture(1) an error appears (i have USB camera):
[ WARN:[email protected] ]...
- 46
-1
votes
2
answers
1k
views
(OpenCV , cv2) The cv2.error while capture the image through camera lens
Error (-215) size.width>0 && size.height>0 occurred when attempting to display an image using OpenCV
I have the similar issue with this discussion, after I read it still don't have clue ...
- 249
1
vote
3
answers
11k
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How to solve opencv cv2.imshow() Unable to init server: Could not connect: Connection refused Can't initialize GTK backend in function 'cvInitSystem'
Hi I installed opencv to a raspberry pi 4 (2022-04-04 Buster OS).
Here is the code I am using:
import cv2
camera = cv2.VideoCapture(0)
success, frame = camera.read()
if not success:
stop('...
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