Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [opencv]

Open Source Computer Vision Library, real time computer vision

386 questions
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3 answers

Can I use OpenCV?

While the Raspberry Pi is not exactly a powerhouse, it should be capable of doing some OpenCV image or video processing. Has anyone tried to install it?
Avogado
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16
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6 answers

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 running into this error when running my script followed…
Justin
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14
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2 answers

Using OpenCV with RasPiCam and python

Has any one been able to get OpenCV to directly play video from the RasPiCam board using python? I've seen some projects involving workarounds, but what I'm interested in is being able to use the RasPiCam board with OpenCV as if it were a USB…
Ryan
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13
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1 answer

Reading video from camera (Kinect if possible)

I am starting up a project that will require Computer Vision to be used on the Raspberry Pi. I am relatively familiar with OpenCV and am aware that it can be installed successfully on a Raspberry Pi though I don't know how successful the Pi would…
user912447
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10
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3 answers

ERROR: Environment '/home/pi/.virtualenvs/cv' does not contain an activate script

I am trying to install opencv 4 on my raspberry pi 4 using these instructions from this website but I have come across an error when I run the command mkvirtualenv cv -p python3. The error is found below. Please do help me guys as I have searched…
user3880651
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9
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2 answers

Can not capture video using OpenCV

I installed OpenCV 2.3.1 in my Raspberry Pi (Debian Wheezy) following this tutorial. But I can't take video using my USB webcam. Gstreamer shows this error: OpenCV Error: Unsupported format or combination of formats (Gstreamer Opencv backend doesn't…
sumith
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8
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1 answer

Different image quality from picamera capture to numpy array and path

The quality of capture from Pi Camera varies when captured to numpy array and when captured directly to a path. The former has more pinkish tint to it than the later. Why is that.? The code I used for capturing the images: from picamera import…
x.projekt
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8
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2 answers

Taking advantage of multiprocessing with OpenCV on raspberry Pi 2

I used to use OpenCV on Raspberry for different projects (face recognition, sync cam, stitcher etc...). I bought a raspberry Pi 2 for the advantages given by the new hardware config. However, I could not use the 4 cores for processing for example…
AtoM_84
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8
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2 answers

installing OpenCV 3.0 on raspberry pi b+

Is it possible to install OpenCV 3.0, opencv python on Raspberry pi b+? How to install and are there any precompiled binaries available ?
parthi82
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7
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2 answers

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 file: no such file or directory I have tried sudo…
JohnConstantine
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7
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2 answers

How to install OpenCV on Raspberry Pi 3 in Raspbian Jessie?

I have searched google for the process of installing OpenCV on Raspbian Jessie on Raspberry Pi 3 but have not yet found any useful help for the query. Following are the…
Aditya Mangalampalli
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7
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3 answers

Picamera taking pictures fast and processing them

I'm working on a school project where I have to make a robot move parallel to a wall and stop when it sees a big red square. For this I have the picamera module and the openCV library. I have working code but the camera takes too long to take a…
Michael Claes
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7
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1 answer

Cross Compiling to Raspberry Pi from Windows with External Libraries

Following this guide, http://www.a2p.it/wordpress/tech-stuff/development/remote-debugging-raspberrypi/ , I was able to cross compile from Windows to Raspberry Pi. But is it possible to cross compile with external libraries such as PCL and OpenCV.…
Xegara
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6
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4 answers

Is there a Raspbian image with OpenCV 3 pre-installed?

After spending days trying to get OpenCV3 to install on Raspbian Stretch, always failing, I thought it would massively help if there's an image with OpenCV pre-installed, which would save several hours of compilation and debugging. Please let me…
Jamboree
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6
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1 answer

2 usb webcam on raspberry pi with OpenCV

I would like to connect 2 usb webcams to a RaspberryPI and be able to get at least 1920 x 1080 frames at 10 fps simultanously. This will be done using OpenCV. Has anyone done this and knows if this is possible? I am worried that the PI has only 1…
Lightsout
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