All Questions
1,014
questions
0
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1
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63
views
PS Camera taking too much light on OpenCV
I installed a third-party driver and firmware to use my PS 4 Camera on PC and I need it to do a object detection project. Everything works fine on camera on Windows (the screen resolution looks buggy ...
- 5
0
votes
0
answers
58
views
cv2.imshow() not working with Picamera2 library
I'm facing an issue with displaying images using imshow when capturing images with picamera2 on my Raspberry Pi. Here are the details:
Problem: After capturing an image using picamera2, I'm unable to ...
- 1
0
votes
0
answers
48
views
Cannot use OpenCV read four 1080p cameras simultaneously
When I run the following code, all four cameras can be turned on (openCamera() does not return -1), but at most only two cameras can output images, and more precisely, they all work at low frame rates ...
0
votes
1
answer
54
views
How to get world coorditates from image coordinates (z=0)
I my camera captures the area on which the objects are located that is why I do not need "Z" coordinate. I recently have this code. I have 4 objects (qr codes, which are in fixed position) ...
0
votes
0
answers
108
views
Latency on the thermal camera while using multi-threading for multiple cameras
I am trying to do some real-time image processing by openCV with videos from web-camera and thermal-camera. I am using multi-threadings methods: one threading for one camera. The simplified code is ...
0
votes
0
answers
127
views
Raspberry Pi Camera Python OpenCV Exposure Control
I'm capturing images from a Raspberry Pi Camera Module v2 using OpenCV in Python (picamera is too slow for my purposes).
I need to increase the exposure time, and have been trying to do that using a ...
- 123
0
votes
0
answers
38
views
Opencv decode failing for user uploaded images
I am getting the decodedMat object as
Mat [ 00CV_8UC3, isCont=true, isSubmat=false, nativeObj=0x6000005f5800, dataAddr=0x0 ]
for most of the jpeg images which are uploaded by users via camera/gallery. ...
- 3
0
votes
0
answers
43
views
What is the correct approach to always use the latest camera frame in OpenCV [duplicate]
I am trying to take stills from a webcam and do some processing on the images
I am using Python 3.10.9 and opencv-python==4.9.0.80
This is pretty much how I set up a USB webcam
camera = cv2....
- 53
0
votes
0
answers
345
views
Camera :Docker: Error response from daemon: error gathering device information while adding custom device "/dev/video0": no such file or directory
i have a python script that open the integrated camera when i run it . it works fine but when i put the script in docker container and tries to run i face this error in the log of the container:
Error:...
- 21
0
votes
0
answers
36
views
Sharpen a part of a image based on a target image with arUco markers
I'm trying to detect as many arUco markers as possible around a screen, but due to the limitations of the camera it sometimes only detects 3-4 markers when the maximum of markers is 16.
So if I know ...
- 1
0
votes
1
answer
69
views
multiple initializations of CV2 VideoCapture
I need to use the camera while it is already recording --> for video streaming at the same time
I heard that it is not possible to call multiple initializations of
video = cv2.VideoCapture(0)
...
- 35
0
votes
0
answers
40
views
New to using openCV in python, I tried copying a code from a youtube tutorial to understand it better, but it isn't working for me why is that?
I'm new to the OpenCV library and I'm trying to learn it. As part of it I tried just using someone's code and testing it on my own computer. The code is identical to that of the video, yet does not ...
- 1
0
votes
0
answers
55
views
Why the camera is not loading in spyder?
I am doing a project based on image processing. In the project I uses the camera to detect and classify images. But the problem is sometimes the camera screen is blank. But sometimes it might come. ...
- 25
0
votes
0
answers
69
views
Open camera shows correct fps but when recording the fps is different
I have 3 Logitech brio/4k stream cameras. Until yesterday, I used them with 30 fps properly.
My OS is Linux. i'm using outer application called 'guvcview' to watch the fps of the cameras on live. It ...
- 1
-2
votes
1
answer
44
views
Not able to access any camera in cv2.VideoCapture()
I tried looping through all the camera ports from 0 to 100, but none of them seem to work. I tried with my laptop cam as well as obs cam. I am working on this for days.
This is my code so far:
#video ...
