I have been searching all over the net and doing what is being said.How should I install open cv in ubuntu 11.10 platform? I want to do some image processing using open cv. Thanks. Btw, Im a novice in programming.
download latest OpenCV-2.4.2.tar.bz2 and extract it.
in terminal cd to the Opencv-2.4.2
run mkdir release
cd release
run cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON ..
run sudo make install
That's it to install opencv. It will take almost 30 mins to install.
But after successful installation you might get another issue with your Ubuntu 11.10 (in my experience). You may get linking error with opencv libraries. To get rid of that problem run export LD_LIBRARY_PATH=/usr/local/lib on every login session. Or add /usr/local/lib -this line at end of /etc/ld.so.conf for a permanent solution.
You can download my detailed opencv implementation of histogram equalization from my website for a good start-up!
my website :
Related
First, I listed this info. on the OpenCV.org site at https://docs.opencv.org/master/d2/de6/tutorial_py_setup_in_ubuntu.html.
Secondly, I used my git source to use this command: git clone https://github.com/opencv/opencv.git
Thirdly, I used these commands to try to build the OpenCV version of 4.3.0.
cd opencv/opencv4.3.0
mkdir build && cd build
cmake -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=/usr/local -DWITH_TBB=ON
-DBUILD_NEW_PYTHON_SUPPORT=ON -DWITH_V4L=ON
-DINSTALL_C_EXAMPLES=ON -DINSTALL_PYTHON_EXAMPLES=ON
-DBUILD_EXAMPLES=ON -DWITH_QT=OFF -DWITH_OPENGL=ON ../
make
In the /build directory, I keep getting kicked out of my session at 71% or my Linux SBC looses online Internet via WiFi at that percentage. Do you see an issue with my cmake command? Do you know or have you seen any issues pertaining to losing control of your Linux SBC during the make command on your side?
I want to install MongoDB C++ Driver, so first is mongocxx
I follow this installation:
http://mongocxx.org/mongocxx-v3/installation/
but I can not pass step 4
when I run this in mongo-cxx-driver/build
sudo cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local ..
it shows
-- Auto-configuring bsoncxx to use MNMLSTC for polyfills since C++17 is inactive
CMake Error at src/mongocxx/CMakeLists.txt:37 (find_package):
By not providing "Findlibmongoc-1.0.cmake" in CMAKE_MODULE_PATH this
project has asked CMake to find a package configuration file provided by
"libmongoc-1.0", but CMake did not find one.
Could not find a package configuration file provided by "libmongoc-1.0"
(requested version 1.13.0) with any of the following names:
[![enter image description here][1]][1]
libmongoc-1.0Config.cmake
libmongoc-1.0-config.cmake
Add the installation prefix of "libmongoc-1.0" to CMAKE_PREFIX_PATH or set
"libmongoc-1.0_DIR" to a directory containing one of the above files. If
"libmongoc-1.0" provides a separate development package or SDK, be sure it
has been installed.
second question,
Step 2: Choose a C++17 polyfill how can I set MNMLSTC/core?
does anyone can help me,I already trap here for a long time ?
my env:
mongo-c-driver 1.15.1
libmongoc-1.0
mongocxx-3.4.x
Cmake is complaining about not finding a package configuration file (xxx.cmake), probably because you didn't build libmongoc/libbson.
I've tried to reproduce your issue and hit the same problem when I only installed them (apt-get install), so my suggestion is that you get the sources and build them as described at: http://mongoc.org/libmongoc/current/installing.html
Here's the list of commands (with the latest version of mongo-c-driver=1.15.1) which I just tried and worked fine:
wget https://github.com/mongodb/mongo-c-driver/releases/download/1.15.1/mongo-c-driver-1.15.1.tar.gz
tar xzf mongo-c-driver-1.15.1.tar.gz
cd mongo-c-driver-1.15.1
mkdir cmake-build
cd cmake-build
cmake -DENABLE_AUTOMATIC_INIT_AND_CLEANUP=OFF ..
make
sudo make install
At this point you can go back into mongocxx/build and run again the command you were stuck at:
cd ../../mongo-cxx-driver/build
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local ..
I'm getting this warning when running the phpunit test suite in Jenkins pipeline.
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/20160303/pdo_sqlite.so' - /usr/lib/php/20160303/pdo_sqlite.so: undefined symbol: sqlite3_column_table_name in Unknown on line 0
However this warning is not thrown when running the test suite directly in terminal.
I have PHP 7.1 in my system and this is the only PHP version I have installed. php7.1-sqlite3 is installed.
Thank you in advance.
As far as I have found out, there is a faulty file in /usr/local/lib called libsqlite3.so.0 which points to libsqlite3.so.0.8.6. I renamed the file in case it was needed for something. With the command:
cd /usr/local/lib
sudo mv libsqlite3.so.0 ./libsqlite3.so.0.back
But you can also delete it:
rm libsqlite3.so.0
The thread that lead me to the answer: link
This solved my problems, and I hope they solve yours as well :)
I had this same issue with PHP 7.1 on Ubuntu 16.04.
Running the following fixed the issue for me:
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install php7.1-sqlite3
Have you built SQLite from source? If yes, enable Column metadata and recompile with
CFLAGS="-DSQLITE_ENABLE_COLUMN_METADATA=1" ./configure
make
sudo make install
Have fun using the cutting edge SQLite.
Reference - https://www.sqlite.org/compile.html#enable_column_metadata
I am new to the openCV library. When I was first trying the code for a feature matching tutorial
Python Tutorial Link
All other functions except for the 'drawMatches' function does not work. I figured out that my openCV version is not correct. Then I update my openCV version to the newest version(3.2.0) using command
conda install -c conda-forge opencv' and 'conda update --all
The problem now is that all other functions does not work because it does not recognize cv2. The error I get is like the following:
ImportError: dlopen(/Users/qdai/anaconda/lib/python2.7/site-packages/cv2.so,
Library not loaded: #rpath/libopenblasp-r0.2.19.dylib
Referenced from: /Users/qdai/anaconda/lib/libopencv_hdf.3.2.0.dylib
I don't know what is the relationship between cv2 and opencv. And how do I solve this problem?
From the paths you have in your example, I am assuming you're on Mac?
If so, I had this same problem.
After having homebrew installed this ended up working for me:
brew tap homebrew/science
brew install opencv
cd /Library/Python/2.7/site-packages/
sudo ln -s /usr/local/Cellar/opencv/2.4.9/lib/python2.7/site-packages/cv.py cv.py
sudo ln -s /usr/local/Cellar/opencv/2.4.9/lib/python2.7/site-packages/cv2.so cv2.so
Hope this helps.
I'm trying installing Erlang on my REHL7.2, but unfortunately I failed. I tried two approaches
First I tried downloading a RPM package from official site of erlang (in fact the rpm package is for CentOS, but there's no RPM package for RHEL anyway), but
error: Failed dependencies:
libwx_baseu-2.8.so.0()(64bit) is needed by esl-erlang-19.0-1.x86_64
libwx_baseu-2.8.so.0(WXU_2.8)(64bit) is needed by esl-erlang-19.0-1.x86_64
Then I tried
$ wget http://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm
$ rpm -Uvh erlang-solutions-1.0-1.noarch.rpm
But it failed too because
No package erlang available.
Error: Nothing to do
I wonder whether Erlang is no longer supported by RHEL? Otherwise how can I install Erlang on my RHEL7.2?
One simple solution to install the Erlang Solutions package is install the epel repository:
yum install epel-release
Then
wget https://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm
rpm -Uvh erlang-solutions-1.0-1.noarch.rpm
sudo yum install erlang
The epel repo contains the libwx_* libraries required.
As instructed here:
enter link description here
Run the following commands (note: the commands on the above link use R15B01, but in the following commands, I changed it to the last release of Erlang (R15B03) It will take a while to finish with the installation. Run commands line by line
sudo yum install gcc glibc-devel make ncurses-devel openssl-devel autoconf
wget http://erlang.org/download/otp_src_R15B03.tar.gz
tar zxvf otp_src_R15B03.tar.gz
cd otp_src_R15B03
./configure && make && sudo make install
After everything is done, you will be still at otp_src_R15B03 where Erlang is installed. Type erl and Enter, then, it should run and open Erlang prompt. I tried running Erlang from my home directory and from the root by just typing erl and it worked too. This way, Erlang is working good for me. To quit Erlang press CTRL + g then q and Enter
There is another way to install and useful info on this link:
enter link description here
I have figured it out! I found two solutions.
The first solution which is also the easiest way is to install a zero dependency version of erlang, please refer to my another Question. But I only tried this way after installing erlang from source, so if you failed this way, just try the following soltuion.
The other one is to build erlang from source (or by kerl which is essentially the same thing).
Install necessary dependencies:$sudo yum install ncurses-devel openssl-devel *openjdk-devel unixODBC unixODBC-devel
Download source code of erlang, unzip it and cd into the direcotry
sudo ./configure sudo make sudo make install
Please refer to this article.
Thank you everyone!
Try this, worked for me.
wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -ivh epel-release-latest-7.noarch.rpm
sudo yum install erlang erlang-nox