Questions tagged [opencv]
Open Source Computer Vision Library, real time computer vision
1
vote
0answers
14 views
Would ZRAM be helpful for running OpenCV?
I'm doing some OpenCV development on a Raspberry Pi 3, and I have found some information about using ZRAM on the Pi to try and boost its processing effectiveness. I know this isn't actually adding ...
1
vote
0answers
35 views
Error unknown machine command despite compiling without errors
I recently made a project using opencv 4 on my raspberry pi 3 b+, but then decided to port the whole project to a new raspberry pi zero, as I want to make it a permanent setup and want to keep my py 3 ...
0
votes
0answers
12 views
RPi camera OCR,and save output in variable (pyhton with tesseract)
I want to make a python code for the raspberry pi, with the tesseract OCR engine, that it keeps reading text from the camera in realtime, saves in a variable, and sends output to Arduino. Is there a ...
0
votes
0answers
17 views
Video streaming from Raspberry PI - Python vs. raspivid + netcat
Some time ago I posted the following post on Stack Overflow, but I got no reply.
I can't figure out where the additional lag with the Python method comes from. The netcat method is really smooth with ...
0
votes
1answer
16 views
Dependencies problem installing mmrcn
Hello i am trying to use ML techniques to identify cars in an image using opencv.
I have been following this tutorial : https://medium.com/@ageitgey/snagging-parking-spaces-with-mask-r-cnn-and-python-...
0
votes
0answers
12 views
OpenCV 3.3.0 issue
Hey when i am running code i got this annoying error
#!/usr/bin/env python
import numpy as np
import cv2 as cv
import os
from pantilthat import *
os.system('sudo modprobe bcm2835-v4l2')
cascade = ...
0
votes
0answers
6 views
Using Cakephp running python tensorflow
The program is work in Raspberry Pi using Rasbian Stretch. I have python script with TensorFlow object detection. Now I am using CakePHP to implement the website. In the CakePHP, I want to run the ...
2
votes
1answer
112 views
how to increase fps for raspberry pi for object detection
I'm having low fps for real-time object detection on my raspberry pi
I trained the yolo-darkflow object detection on my own data set using my laptop running windows 10. When I tested the model for ...
0
votes
0answers
45 views
Raspberry Pi shows 100% CPU usage then crashes when I run a python script
Hi I've been working an opencv and python project which the raspi should detect and recognize a face and detect a motion. It works fine with my laptop but after I run it on my raspi the raspi crashes. ...
0
votes
0answers
25 views
A way to synchronise image stream on multiple pis
I am trying to send a sequence of images from a "master" pi to two other pis on the same network. Each "slave" pi will need to receive a different image from the "master" pi but the two images will ...
0
votes
0answers
64 views
Tensorflow object detection script is being killed by system
I'm trying to run an object detection script using Tensorflow. After running the python script it's being killed or freezes. I can see camera's light is being turned on right before the script stops. ...
1
vote
0answers
44 views
When I run the face recognition code, I get the following errors
cv2.error: OpenCV(4.0.1-dev) /home/pi/opencv/modules/highgui/src/window.cpp:610: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa ...
0
votes
1answer
38 views
OpenCV install 'so' files not found cant insall via apt
Rasp 3 B+, Raspbian
I installed OpenCV using pip3 install opencv-python
Then tried to import cv2 which threw the error..
ImportError: libcblas.so.3: cannot open shared object file: No such file or ...
1
vote
2answers
41 views
Stream remote pi+rasp camera to another computer?
Hi is it possible to stream the video feed from a pi camera (3 b+ model) across a LAN to another computer running Linux?
My idea is to see if pi can be used almost like an IP security camera where I ...
0
votes
0answers
13 views
gpiozero ImportError in virtual environment
I've been trying to use the gpiozero library lately with one of my opencv projects. Installed gpiozero using pip. Sample code works fine, no issues.
The problem is, my opencv installation is in a ...
1
vote
3answers
235 views
can't install opencv on my pi
I'm an absolute Raspberry Pi newbie. My intention is to get some camera vision project working for which I need OpenCV3.3's dnn Python module.
I've found here a description of how OpenCV can be ...
0
votes
1answer
76 views
trying to run 6 USB cameras simultaneously on a single Raspberry Pi 3B+ with add-on 4 port USB hub with external power
We are trying to simultaneously run 6 cameras on a Raspberry Pi 3B+ with an add-on 4 port USB hub that has an external power supply. The cameras are set at 15 FPS with a colour image size of 640 X 480....
0
votes
1answer
80 views
cv2.line is not working in Rpi 3
model no: RPi 3 B
Software: Python 3.5.3
Problem:
I am using opencv 3.4 .I was trying to draw a line using function cv2.line().But it returns nothing.But the same code was working fine in my laptop ...
0
votes
1answer
175 views
RPI object tracking with multiple objects
I have been reading a tutorial on creating a Rpi colour based object tracking system but have been unable to test it due to me being a away from my Rpi. However I have read through the code and it ...
1
vote
0answers
80 views
OpenCv compilation on raspberry pi stops at 16%
I was installing OPENCV on raspberry pi and all are done but when the compilation of opencv it stops at 16%.I used make -j4 as well as make -j1.It gives no error and it comes to build folder.
This is ...
-1
votes
1answer
30 views
How to dynamically determine objects based on some uniqueness?
As the title states I looking for a way to (detect and then) determine a object within some range. The object will be forklift or "train" in the factory. Main goal is to provide some GUI from which it'...
0
votes
3answers
957 views
OpenCV 4 error?
When I run the command python faceDetection.py I get the error-
VIDEOIO ERROR: V4L: can't open camera by index 0
Traceback (most recent call last):
File "faceDetection.py", line 21, in <module&...
0
votes
1answer
860 views
Workon Command not found when using pi, but works from ssh
when I run the work command to get into my cv virtual environment on my pi it displays
pi@raspberrypi:~ $ workon cv
bash: workon: command not found
however when I ssh into my pi from my MacBook and ...
1
vote
0answers
46 views
Raspberry camera with opencv, measure brightness
I want to build a camera with my Raspi.
It should take picture whenever a face is detected.
But it should give a warning when the brightness is too low for a good picture.
Does anybody know a simlpe ...
1
vote
1answer
240 views
How to read RAW Picamera jpeg images in python
I acquired a set of images with the command raspistill -r -ss 100000 -o image.jpg, and I'd like to process the 'JPEG+RAW' images, which I already obtained, with OpenCV on python. I am aware of ...
0
votes
0answers
93 views
Executing a opencv python2 script from SSH Putty console
I try to execute a python2 script which is supposed to display a movie file.
When I execute this code with VNC it works, I can see the movie being played (eventhough the fps is limitted around 2...)
...
0
votes
0answers
484 views
Problem with Pi Cam / Python / opencv: “Incorrect buffer length for resolution 640x480”
I want to build an animal counter based on pi zero w, pi cam, python and opencv.
I read some tutorials (especially from https://www.pyimagesearch.com) how to setup all that stuff and in principle ...
0
votes
0answers
553 views
OpenCV : Gtk-WARNING **: cannot open display:
I got a python script supposed to load a video.
My Pi set up in headless mode and I would like not to use any X server for displaying the video but instead having the video displayed to the hdmi port....
3
votes
1answer
947 views
Install opencv on Raspberry Pi 3 in a different way than compiling from source
I am using Raspbian Stretch on my RPi 3, I wanted to install OpenCV on it.
I did this before by following the instructions detailed here .
The problem is that this takes a very long time.
Lately, I've ...
0
votes
1answer
238 views
How to Install OpenCV in Visual C++ for Linux Development
I want to use this plug-in for Visual Studio
Visual C++ for Linux Development
to develop applications for the Raspberry Pi with code generated from another computer using Visual Studio.
In my laptop ...
0
votes
1answer
74 views
Open CV Cmake g++ does not work on Rasbian jessie
I am compiling Open CV library on Raspbian jessie. I get below error .
> -- Check for working CXX compiler: /usr/bin/g++ -- broken
> CMake Error at /usr/share/cmake-3.6/Modules/...
0
votes
1answer
791 views
Access RPi's camera stream in OpenCV C++ (Qt)
I've setup my Raspberry pi 3 B with uv4l and have access to the video stream on
http://(raspberry-IP):8080/stream address.
Now, I have Qt5(C++) and OpenCV installed on my main computer.
How can I ...
0
votes
2answers
2k views
import cv2 not working Raspberry Pi
I used pip to install opencv3 with the following command on an Anaconda virtual environment.
install opencv-python
I successfully installed it because I can see the package in pip list.
(olfatf)...
0
votes
0answers
563 views
Http IP camera not working on Pi but working on Ubuntu
I have a situation, I have two IP cameras one on RTSP and other on HTTP, I am using I am using Python 3.4.2 and opencv 3.4.1 on my raspberry pi, I am able to read from My webcam, and RTSP IP camera ...
0
votes
0answers
430 views
Raspberry pi 3 B connection with wireless IP camera through RTSP (Wifi)
i'm using python=3.5 and OpenCV 3.1.4 to establish a connection with my IP camera via RTSP protocol and by using wifi on Raspberry Pi 3 B
here's my code
import cv2
from imutils.video import ...
0
votes
1answer
87 views
Installing opencv-3.3.0-r5 on Gentoo 64 bit OS at Raspbery Pi 3B+
My linux environment is
pi64 /home/demouser # uname -a
Linux pi64 4.14.31-v8-b36f4e9e1984+ #1 SMP PREEMPT Sun Apr 1 14:15:34 BST 2018 aarch64 GNU/Linux
First time, I use Porthole to emerge opencv-3....
4
votes
1answer
137 views
Does gpu memory affect video processing speeds using openCV or image array manipulations?
I am using my pi for video processing. The data transformations include image array manipulations and object detection.
It does not include any video display. Essentially, the pi takes in a video ...
1
vote
1answer
253 views
Slow Video Processing
I installed OpenCV libraries in raspberry pi for my project "Air Hockey Robot" and I'm using python for video processing. I am using PS3 eye camera for video capture at 60 fps. But it seems that video ...
0
votes
1answer
65 views
How to add openCV on PyCharm under rpi 3 B?
I am trying to add OpenCV lib on PyCharm running under Raspbian on a Rpi 3 model B. I tried the jessie version of commands but got stuck on the
cmake -D CMAKE_BUILD_TYPE=RELEASE \
-D ...
0
votes
0answers
372 views
How to improve face detection's performance and image quality using the NoIR camera?
I'm building something similar to a timelapse project where I'd like to be able to continuously detect faces and then align, scale and crop them before saving. I'm interested in having high quality ...
0
votes
1answer
1k views
Installing OpenCV 3
I have been trying to install opencv 3 but this github url(https://github.com/Itseez/opencv_contrib/archive/3.3.0.zip) seems not working. But the zip file is downloading when I'm entering above url in ...
0
votes
0answers
251 views
Webcam feed is very slow
I'm using this code to calibrate stereo vision using two Logitech c270 webcams and Raspberry pi 3 model B.
My problem is webcam feeds shown by openCV are very slow and even not responding sometimes. ...
1
vote
0answers
367 views
opencv cv2.imshow doesn't work
I'm working a project that getting a video from usb camera on raspi for encode qr code. So I wanna display the current frame, but i am getting this error:
<cv2.imshow('Current', frame)
error:/...
2
votes
1answer
4k views
How can I use OpenCV with Python 3 on a Raspberry Pi?
I have installed OpenCV and and access it with Python 2. However, I'm unable to use OpenCV with Python 3.
It says "Cannot open shared object".
ImportError: libQTtest.so.4: cannot open shared object ...
3
votes
2answers
4k views
Failed to create MMAL component b'vc.ril.camera': Out of memory
I am trying to run a simple script that listens for a button click and then takes a picture. Once two pictures have been taken it compares the two using OpenCV to calculate the difference. I am ...
0
votes
2answers
125 views
HEAD is now at 92387b1ef… Fix java version++
I have raspberry pi 3, I want to install OpenCV for python.
while I was doing that according to the following steps...
sudo apt-get update
sudo apt-get upgrade
sudo rpi-update
sudo reboot
sudo apt-...
5
votes
3answers
508 views
Is it necessary to release Raspberry Pi Camera before rebooting? If so how do I do it?
I have a python3 script that uses OpenCV and a Raspberry Pi cam. It runs almost 24/7. Using crontab the pi will reboot every night at midnight and the script will begin running again. This is mostly ...
0
votes
0answers
367 views
Gstreamer error qt / opencv project
After making project on Rpi I receive this error after calling VideoCapture c(0) (I think...)
Am I referencing the Pi NoIR camera incorrectly? Or am I missing or have I incorrectly installed ...
1
vote
0answers
824 views
Cant import cv2 (Model B) Python 3.5
Basically Im very new to linux systems and an, above average in python, I intended to make a program that detect hand gesture (high five , victory one,three etc) , I created my own test code that ...
0
votes
0answers
843 views
Stream Pi Camera to Server - webRTC
I have setup a raspberry pi to stream an h264 video feed from a pi cam to a remote host using Red5 Pro. I then use openCV cv::VideoCapture to read the stream and process it. Im currently using RTMP ...
