Questions tagged [opencv]

Open Source Computer Vision Library, real time computer vision

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5
votes
1answer
8k views

Resolution properties for python's OpenCV and uv4l camera driver

I've followed this tutorial to install OpenCV 2.3.1 in raspberry and it has worked fine. I've also installed from here the uv4l raspicam driver. But now I need to modify some capture properties as the ...
6
votes
3answers
21k views

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 ...
2
votes
0answers
953 views

OpenCV. Can't open video from usb camera on the screen

When I'm trying to start simple code, the frame opens and don't respond. import numpy as np import cv2 cap = cv2.VideoCapture(0) while(True): ret, frame = cap.read() cv2.imshow('AIR',frame) ...
2
votes
2answers
16k views

Installing opencv (C++) on Raspberry pi and other misc packages

I've been doing a fair amount of research in regards to installing opencv on to a raspberrian distro, but the problem is that there is far too many different methods to installing it and truth be told,...
0
votes
1answer
3k views

site-packages dir empty but OpenCV works…what the?

I used the following to install opencv sudo apt-get install libopencv-dev python-opencv I can "import cv2" fine, read images, manipulate them to my hearts content...everything works great! However, ...
3
votes
1answer
955 views

how to install cross-compiled OpenCV's libraries on raspbery pi

My problem is may be complicated, I'll try to detail I cross compiled opencv for ARM (Raspberry Pi) from my host, and everything works fine. I also tried to cross compile an example and it also ...
4
votes
4answers
14k views

how to install libtbb-dev in raspberry-pi

I am trying to install libtbb-dev on my raspberry-pi as part of installing opencv. sudo apt-get install libtbb-dev But i am getting an error as Package libtbb-dev is not available,but is refered ...
1
vote
0answers
570 views

opencv and cv2.so/libcv2.so setup for python

I installed opencv 2.4.8 on my raspberry-pi. But i am not able to locate cv2.so /libcv2.so so that whenever i import i get error as cv2 not found. Is there a way to download theese packages to use in ...
2
votes
2answers
5k views

Pi Camera Module frames directly to OpenCV lib for processing

My intension is to use raspberry Pi for tracking coloured object. I am using Python, OpenCV and Raspberry pi Camera Module. Since OpenCV doesn’t work out of the Box with raspberryPi cam Module, I ...
0
votes
1answer
4k views

Exposure correction via Picamera module

I am using the python picamera module developed by Dave Hughes. As per the documentation, the camera exposure can be set between -25 to 25. In my application, I need to get brightest pixels from the ...
1
vote
1answer
722 views

Logging faces with OpenCV

I'm pretty new to OpenCV. Basically I want my RPi to do facial recognition with OpenCV and then log (save only the face as a picture) and store it in a database. How would I achieve this? I also want ...
2
votes
0answers
862 views

Is RaspberryPi OpenCV fast enough to run eye blink recognition?

I would like to create application that can recognise eye blink recognition on RaspberryPi with Raspberry Pi Noir camera. Eye blinks are fast, so I will have to process many frames per second. Is ...
2
votes
1answer
3k views

I don't get 24 frames per second

Although the camera framerate has been set to 24, 24 frames are being captured at 3 seconds. Wondering where I am going wrong?? I need to convert the stream to an OpenCV object to do further image ...
1
vote
1answer
857 views

Difference between pi camera & usb HD cam

I am working on image processing project where working on frames taken by camera using raspberry pi. So i want to know which is better ? to use pi camera or usb cam , Hint : required good camera as ...
0
votes
0answers
185 views

Opencv configuration issue

I have recently installed opencv 2.4.8 on my raspberry pi.When i check the version with pkg-config --modversion opencv 2.4.8 But in my python code when i import cv2 i am getting the error as no ...
-1
votes
1answer
358 views

model a with opencv

I got a camera, a model A and a 8gig sd card and no idea what i'm doing I tried writing the noobs full image to the disk but when i plug it into the montior and power it on I get nothing Is there an ...
13
votes
2answers
24k views

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 ...
2
votes
1answer
1k views

Can I use openCV with Java SE embedded wrapper for Raspberry Pi?

I will try to explain what I am trying to do, as it seems to be relevant in order to understand my question. I am currently trying to do face recognition from a webcam connected to a Raspberry Pi ...
1
vote
0answers
1k views

Installing openCV on raspberry pi for video detection error avformat.h not found

I want to install opencv on the raspberry pi for image detection on a video I have followed this tutorial but the videos are not to be played or proccessd. I tried to install it again to make sure ...
5
votes
2answers
4k views

Image Recognition Raspberry Pi

I'd like to distinguish different types of beers in my fridge using a Raspberry Pi. I saw a very good tutorial on Adafruit that utilized OpenCV for face recognition. Can these same face recognition ...
1
vote
1answer
1k views

Options for slow camera via OpenCV

I'm desperately trying to use the Pi camera to do some work with it; I'm using OpenCV but trying to process the feed from the camera itself. Currently I'm running OpenCV on the Pi itself but this is ...
4
votes
1answer
816 views

Building Raspberry Pi apps from Windows

I want to build a C++ program for face detection using Visual Studio and OpenCV. I already installed the Visual Studio 2013 Express Edition and the OpenCV 2.4.8 on my Windows 8 computer and linked ...
1
vote
2answers
2k views

How to install opencv and eclipse on a raspberry pi

Is this possible? I've tried through command line but haven't found a clear tutorial yet. Would it be easier to accomplish this from gui or should I stick with the terminal?
0
votes
2answers
1k views

my raspberry pi freezes while face tracking using openCV and servoblaster

I'm trying to track face with Pan and tilt motion, using servoblaster and opencv, i followed this tutorial if anyone is intrested.. it runs perfectly but after few seconds camera freezes and it stops ...
2
votes
2answers
1k views

How can you use face recognition on raspberry pi as a login to the pi?

I have created an owncloud server using RPI, Now I was wondering how to implement the face recognition as a login for the pi. I know I have to use the OpenCV.
0
votes
0answers
269 views

Image Processing

I implemented face recognition algorithm in raspberry pi(python 2.7 is was used), i have many sets of faces, if the captured face is one in database then the face is detected(i am using eigen faces ...
1
vote
1answer
2k views

tornado server with video streaming

I'm running tornado web server on my Raspberry Pi and its task is very simple. It just takes commands and sends them to an Arduino over serial. I'm thinking of adding the Pi camera module and then ...
3
votes
0answers
826 views

Raspicam has low fps for OpenCV

So far, I've tried these tutorials: 1 & 2. I have also attempted to use this code to test it out, and the fps rate is quite low. It's just 2 -3 fps, which is not as high as when I stream via vlc ...
0
votes
0answers
505 views

How to get started with OpenCv on Raspberry-Pi

I have just installed the OpenCV (2.4.8) on my Raspberry-pi working on raspbian using these steps from this blog entry. I can find the cmake in the applications but not the opencv what is the next ...
0
votes
0answers
1k views

Cross-compilation with OpenCV

I'm stuck in cross-compilation my RPi with OpenCV, my project just one file main.cpp and build success in my computer by this tut. I want to run it in RPi. I read this tut but can't understand much, ...
2
votes
1answer
18k views

OpenCV cv2.VideoCapture(0) doesn't work

The question is a bit similar to this question. The main difference is that I'm using a different camera (the Raspberry Pi camera board). I've spend a few days exploring Python and OpenCV. I'm ...
2
votes
1answer
2k views

Failed to find “GLESv2” when compiling OpenCV?

I'm having trouble compiling opencv 2.4.7 with cmake, I get a Failed to find "GLESv2" error: (hal)pi@raspberrypi ~/OpenCV/opencv-2.4.7/build $ cmake -D CMAKE_BUILD_TYPE=RELEASE -D ...
3
votes
1answer
4k views

Installing OpenCV on Raspberry Pi: can't find packages

I'm trying to install OpenCV 2.4.7 on Raspberry Pi (Model B, OS: Raspbian). The guides I'm referring to are: 1. RASPBERRY PI + SIMPLECV + OPENCV + RASPICAM CSI CAMERA 2. Raspberry Pi + OpenCV 3. ... ...
7
votes
1answer
5k views

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 ...
1
vote
1answer
2k views

Opencv on a raspberry PI [closed]

What language would be best to use on a raspberry PI with Opencv. Bearing in mind for each language used : Library updates Development Environment including tool kits Performance ...
6
votes
1answer
3k views

What method should I use to track a moving object with a moving camera (using resources of RaspberryPi)

I'm playing around with motion detection through a webcam connected to RaspberryPi using OpenCV and cvBlob in C++. I want to kick it up a notch and make a robot that detects and tracks movement ...
4
votes
1answer
2k views

Raspberry Pi becomes unresponsive when running opencv

I have successfully installed OpenCV on my Raspberry Pi and have been fooling around with some simple webcam streaming, live canny-edge detection, and so forth, all using basic C and C++ code. However,...
3
votes
2answers
2k views

Porting Windows software

I would like to know is it possible to port software that uses OpenCV, OpenGL and QT on Windows to the Raspberry Pi. I wonder is it a must to use Qtonpi dist? I need resources like books, tutorials ...
12
votes
1answer
1k views

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 ...
3
votes
1answer
1k views

Why would an OpenCV program capturing video frames freeze after a few seconds?

I successfully installed: http://code.google.com/p/cvblob/ on my pi and compiled "red_object_tracking.cpp". Code located here: http://cvblob.googlecode.com/svn/trunk/samples/red_object_tracking....
2
votes
1answer
5k views

How do you build Open CV programs for raspberry pi using a cross compiler?

I have a cross compiler that allows me to compile code on Mac OS x 10.7 and produce binaries for the Raspberry Pi. Compiling simple "helloworld.cpp" programs works like this: /usr/bin/raspi-g++/...
3
votes
1answer
2k views

Installing mjpg-streamer

I tried to install mjpg-streamer(experimental) in pi. But I don't know what to do after the following command. This remains a lot of time. If I tried to kill it shows errors for next command. pi@...
1
vote
1answer
4k views

How we can take video using mjpg streamer in raspberry pi

I am using raspberry pi(Debian Wheezy) with OpenCv 2.3.1. I tried to take video using e-CAM30_USB module but failed. I can take images. FFMPEG is on. But gstreamer tells the stream is unsupported. ...
8
votes
2answers
4k views

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 ...
3
votes
1answer
12k views

how do you build sample OpenCV programs that come bundled with the OpenCV source?

I have successfully installed OpenCV 2.3.1 on Raspbian image and I would like to build/run some of the C/C++ programs located under the ~/OpenCV-2.3.1/samples directory. For example, if I wanted to ...
5
votes
3answers
3k views

Building Open CV fails on Raspbian on make at 61%

I am trying to install Open CV on Raspbian by following these steps: http://mitchtech.net/raspberry-pi-opencv/ Everything works up until I do a "make". It gets up to 61% and then I get the ...
3
votes
2answers
7k views

Error in installing opencv on raspberry pi

I tried to install opencv on my raspberry pi (OS:Debian wheezy) following the site http://eduardofv.com/read_post/185-Installing-OpenCV-on-the-Raspberry-Pi But when I entered the command it shows ...
29
votes
3answers
9k views

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?