OpenCV (Open Source Computer Vision Library)

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How to compile source which needs -lopencv_contrib on Ubuntu?

I want to compile this code I installed glut via sudo apt-get install freeglut3 freeglut3-dev To install OpenCV, i run a script from this page, went to build subfolder of OpenCV and run make install ...
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Ubuntu webcam access core-dumps on VirtualBox

I have Ubuntu running as guest OS on VirtualBox. I want to do some programming in cv2 (openCV) involving the built-in webcam on my dell laptop, but when I try to run Cheese, I get: ...
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How to disable cuda and nvidia when install opencv

I am using ubuntu 14.04 version 64 bit. I install nvidia driver and cuda before. Now. I want to install opencv from source file. I don't want to install cuda and nvidia again (as I know opencv have ...
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openCV-2.4.9 'make' error

I want to install openCV-2.4.9 on Jetson TK1. Environment of this is Ubuntu 14.04. I refer to http://www.sysads.co.uk/2014/05/install-opencv-2-4-9-ubuntu-14-04-13-10/ In this process I had the error ...
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1answer
230 views

building caffe: failed to see hdf5.h

Hello caffe is a lib for deeplearning. When trying to build that lib under 15.04, the compilation fails with the message: :~/App/caffe$ make all PROTOC src/caffe/proto/caffe.proto CXX ...
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Two webcams of the same model are not working

I've been developing a dual webcam system for stereoscopic purposes, in a linux enviroment, using c++ with the opencv library The ideal setup would be with 2 webcams of the same model, but it didn't ...
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198 views

Unable to insall libgtk2.0-dev on ubuntu 12.04

I am using opencv 3 on ubunut 12.04 and while displaying an image the error message asks me to build the library with libgtk2.0-dev. I tried sudo apt-get install libgtk2.0-dev but I get the following ...
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139 views

Ubuntu 14.04 OpenCV3 ffmpeg or libav dependencies

I need to install OpenCV on Ubuntu 14.04 to work with Python3 but the only version that is compatible is OpenCV3 which is at 3.0 RC1 http://opencv.org/downloads.html Following installation ...
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56 views

error capture ueye XS - opencv

I'm new in this forum, I hope someone can help me cuz I'm close to get crazy. I'm working in my dissertation, and I'm having a hard time with this issue. I capture images with a camera (IDS uEye XS - ...
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179 views

Installing OpenCV 2.4.10 in Ubuntu 14.10

I'm trying to install the Opencv ruby gem. I learned from http://stackoverflow.com/questions/20833485/not-able-to-install-ruby-opencv-gem that the gem requires the previous release of Opencv. I've ...
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117 views

C920 + OpenCV and VLC resolution problem

I am trying to use one webcam Logitech C920 with OpenCV to record videos and the resolution recorded is 640x320. I already tried to change the resolution with .set(CV_CAP_PROP_FRAME_WIDTH,1280) but it ...
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1answer
159 views

g++:error: `pkg-config --cflags --libs opencv`: No such file or directory

I run a program like this: g++ begueradj.cpp -o begueradj`pkg-config --cflags --libs opencv` I want to run the above command line from a Python file test.py: import subprocess ...
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103 views

How do I update OpenCV in Ubuntu 14.04?

I need to update my OpenCV version. What’s the easiest way to do this?
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2answers
35 views

libopencv_features2d.so.2.4 present in /usr/local/lib but executable needs libopencv_features2d.so.2.3

I am a newbie so if this question has been previously asked or it is too rudimentary, please go easy on me and be helpful. I have installed opencv-2.4.0 and now I am working on terrain classification ...
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38 views

Sorry, the application ld.bfd has stopped unexpectedly

I am making opencv-2.4.11, and when I make, eventually in the make process, I get a pop up saying "Sorry, the application ld.bfd has stopped unexpectedly", and I get a make error(make: ***[all] Error ...
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1answer
107 views

Unable to install opencv on 12.04

I want to OpenCV it for image processing in a line tracer robot using camera. I want to install openCV on my 64-bit laptop with ubuntu 12.04 2GB Nvidia card. I tried the command: sudo apt-get ...
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76 views

Python - problem importing OpenCV?

If I run the following I see that OpenCV is installed: $ pkg-config --modversion opencv $ 2.4.10 I have it installed in a virtual environment but when I try to import the cv2 module I get an error: ...
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47 views

crash while compiling opencv

I'm currently trying to install opencv-3.0.0 on ubuntu 14.04 as per these instructions: http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html Everything works fine until ...
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58 views

Error Installing OpenCV

Using the instructions found at the official sites documentation, I'm getting an error while trying to install required packages with the command: sudo apt-get install cmake git libgtk2.0-dev ...
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173 views

Simple OpenCV program crashes

I am currently having a problem. I am following the instructions given in this book "OpenCV 2 Computer Vison Application Programming Cookbook" for creating a simple image display program in OpenCV ...
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98 views

Adding OpenCV CUDA support after installation

I am having a problem. I installed openCV 2.4.10 following this tutorial. http://www.sysads.co.uk/2014/05/install-opencv-2-4-9-ubuntu-14-04-13-10/ At the moment of installation I did not enabled the ...
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446 views

Cannot install last version of OpenCV on Ubuntu 14.10

I try to install opencv using the instructions from here but I get every time the error Linking CXX shared library ../../lib/libopencv_videoio.so /usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): ...
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1answer
530 views

Failure to Install opencv 2.4.9 on ubuntu 14.04

I am trying to install opencv 2.4.9 on ubuntu 14.04. I am getting an error while compiling files. When I run: cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D ...
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81 views

Multiple Libraries in OpenCV. Build error in Eclipse

I messed up with my OpenCV recently and thus had to reinstall it alongwith Eclipse. Now when I try to link Eclipse with OpenCV, it gives me the following error at build /usr/bin/ld: cannot find ...
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42 views

Uninstalling OpenCV in 14.04

I have read various topics regarding the uninstallation of OpenCV, but haven't been able to do so. Partly because I am noob and mainly because those haven't been very much detailed as to how to use ...
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78 views

Editing OpenCV source code

How would one go about editing either the C++ opencv functions and/or the python opencv functions in Ubuntu? Where is the source code located? For C++ how would one go about recompiling the source ...
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113 views

Open Cv installation problem

I am following this link for installing OpenCv but on the make step I came across an error: home/aman/opencv/opencv/modules/videoio/src/ffmpeg_codecs.hpp:98:7: error: ‘CODEC_ID_H264’ was not ...
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1answer
68 views

Output of make command FBReader open source - /usr/bin/ld: cannot find -llinebreak

I am new to Ubuntu. I want to make a FBReader open source project. please help me out where I am lacking? Creating libzltext.so.0.14.0 .../usr/bin/ld: **cannot find -llinebreak collect2: ld returned ...
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180 views

Switching from GCC to Clang to compile with OpenCV

I have been compiling code that uses OpenCV by using a CMake project with the following flags in GCC: -Wall -Werror -std=c++14 And it compiled every time. No problems anywhere. When I switch to ...
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56 views

Save floating point values in a file in OpenCV

I want to write floating point values in a text/excel file using OpenCV. I need help in this regard.
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5k views

How to uninstall OpenCV 2.4.9 completely from Ubuntu?

I want to integrate OpenCV with qt creator and for that OpenCV 3.0 is required. I have OpenCV 2.4.9 already installed and want to uninstall it completely as it is causing problems in some functions. ...
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1answer
378 views

Opencv commands are needed to be called as root using 'sudo', otherwise shows error

When I enter into my Opencv project directory and do the following command- sudo cmake . sudo make it generates make files without any error and the program runs successfully. But when I do cmake ...
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92 views

install opencv-2.4 in beagleboard zm rev c (12.04)

I'm running ubuntu-12.04-preinstalled-desktop-armhf+omap.img in my BBxm. I want to install opencv-2.4 for a software dependency, but apt-get install only gives me opencv-2.3. I want to avoid manual ...
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144 views

Unable to install Box2D package

If I try to run sudo apt-get install python-box2d I get this nonsensical error message: Reading package lists... Done Building dependency tree Reading state information... Done You might want ...
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1answer
242 views

uEye camera OpenCV on Ubuntu my code and cv::namedWindow and memcpy are not working together

I installed uEye sdk 4.40 on my Ubuntu 12.04 and I have also installed OpenCV 2.4.9. They are working as well as individually. I wrote some code on Eclipse, to get image from the camera and wanted to ...
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7k views

Installing OpenCV in Ubuntu 14.04 [duplicate]

I'm a novice and absolutely new to Ubuntu, although what I'm asking is pretty elaborate I'm sure there must be pretty more users like me wanting to install the latest stable version of OpenCV on my ...
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Flea2 Camera Firewire not detected in opencv ubuntu

I have researched so much to resolve this, but I haven't got a solid solution yet. I am using a Flea2 camera connected to laptop through the firewire port. The Coriander is abe to detect the camera, ...
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170 views

/usr/bin/ld: skipping incompatible .//libasmlibrary.so when searching for -lasmlibrary

I am using ubuntu 12.04. I am trying to build asmlibrary from this link https://github.com/greatyao/asmlibrary on my system . opencv2.4.9 is installed on my system. I am trying to run make command and ...
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1k views

cannot ccompile the basic opencv cpp program

I made the ~/.compile_opencv.sh as given https://help.ubuntu.com/community/OpenCV on this website and then I made this file opencvtest.cpp with the following contents . The image path is a valid path ...
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2k views

error adding symbols: DSO missing from command line

I am newbie to Ubuntu.i want to compile a project that uses opencv but it gives following error: cmake . && make /usr/bin/ld: ...
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3answers
25k views

Result of make command is /usr/bin/ld: cannot find -lcudart

I am newbie to Ubuntu and using Ubuntu 14.04 64-bit. I want to make a project that uses cuda and opencv I got the following error when running cmake . && make Linking CXX executable ...
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1answer
513 views

Using OpenCV with OpenGL

I want to use OpenCV with OpenGL. It says the library has no GPU support because it was compiled without any. Is there an OpenCV library compiled with OpenGL somewhere in the repositories? Or do I ...
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2answers
1k views

Cannot open 2 USB cameras simultaneously on VLC player Ubuntu 12.04

Cannot open 2 USB cameras simultaneously on VLC player Ubuntu 12.04 How I open a Camera: In terminal (text after the $ prompt = commands that I type): $ ls /dev/video* /dev/video0 /dev/video1 $ vlc ...
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Using camera in opencv

I want to make a robot and I should do live image processing.so I need to take video from somewhere from a camera (canon powershot A3100) and process it.note that taking video is live means that when ...
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479 views

“make” error when installing OpenCV

[ 38%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/convert.o In file included from /home/bomi/OpenCV/modules/core/src/precomp.hpp:55:0, from ...
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1answer
2k views

Error while compiling OpenCV in Ubuntu 14.04

I followed the instructions for compiling opencv2.4.9 from Install OpenCV 2.4.9 in Ubuntu 14.04, 13.10 I am getting the following error during the build process. Can someone point out to me how to ...
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1answer
110 views

installed libopencv results in blackscreen after login

I am new to Ubuntu and set it up a few days ago. Now I wanted to install OpenCV since I need this for university matters. After turning off my pc I was able to log in but afterwards just a black ...
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1answer
1k views

OpenCV error in setting resolution with c910

I've been trying to use OpenCV to control my webcam (Logitech c910) through python. I 've managed to capture images through .read() but they are 640 x 480 and I haven't managed to set the resolution ...
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2answers
18k views

How to install opencv 2.9 for python?

I have been having the exact same problem as described in this post and someone in the answers suggested that you upgrade to opencv version 2.9. I was wondering how do that? I installed the version ...
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2k views

Install opencv eclipse

I am using ubuntu 13.10 and I am trying to install opencv on eclipse. I am following this tutorial LINK I do not know where is my library. This what I obtain when I try to find the files. ...