Install opencv, you can call in c or c ++ opencv in
1, the installation from the library is the easiest way to directly run the following command:
sudo apt-get install libopencv-dev python-opencv
If an installation error, you can update at the source, or from a different source.
2, to test whether the installation was successful:
Run the command: pkg-config --cflags --libs opencv information appears below
licaibiao@ubuntu:~/test/OpenCV$ pkg-config --cflags --libs opencv
-I/usr/local/include/opencv -I/usr/local/include -L/usr/local/lib -lopencv_shape -lopencv_stitching -lopencv_objdetect -lopencv_superres -lopencv_videostab -lopencv_calib3d -lopencv_features2d - lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_video -lopencv_photo -lopencv_ml -lopencv_imgproc -lopencv_flann -lopencv_core
3, run a simple program test.cpp:
#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <iostream>
using namespace std;
using namespace cv;
int main ()
{
char c;
CvCapture * capture = cvCreateCameraCapture (0); // corresponding to the camera view is the date
if (!capture)
{
printf("Fail\n");
}
IplImage* src;
for (;;)
{
src = cvQueryFrame(capture);
cvShowImage("Input", src);
c = waitKey(10);
if (c == 27) break;
}
return 0;
}
4. Compile method:
a, compiled by cmake
First, add a CMakeLists.txt file, as follows:
project(test)
find_package(OpenCV REQUIRED)
add_executable(test test)
target_link_libraries(test ${OpenCV_LIBS})
Then cmake,
After the re-make,
Generate an executable file test.
./test。
b, g ++ compiler through
Execute the command: g ++ test.cpp -o test `pkg-config --cflags --libs opencv`
Note: There are two `pkg-config --cflags --libs opencv` dot above, is the symbol of the left side of the keyboard 1.
Generate an executable file test.
./test。
5, there is a problem:
If ./test appears: error while loading shared libraries: libopencv_highgui.so.3.2: can not open shared object file: No such file or directory error, that is the path to the dynamic link library did not add good, can add the following way:
1, opened with vim /etc/ld.so.conf, pay attention to use sudo to get permission to open, or can not be modified, such as: sudo vim /etc/ld.so.conf, add a line at the end of the file in / usr / local / lib
2, run:
sudo ldconfig
3, modify bash.bashrc file:
sudo came /etc/bash.bashrc
4, the end of the file is added:
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH
5, the last execution:
source /etc/bash.bashrc
Install opencv, you can call directly in python opencv
It is confirmed python environment 3.5.
Then install the command: sudo pip3 install opencv-python
Error / var / cache / apt / archives / related, installed by the following command:
sudo dpkg -i --force-overwrite /var/cache/apt/archives/python-problem-report_2.0.1-0ubuntu9_all.deb
sudo apt-get -f install
View opencv Version:
pkg-config --modversion opencv
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These are set up in the x86 architecture environment.
Here is the arm architecture environment to build.
In the arm architecture opencv environment to build, you can call directly in python opencv API
Ubuntu on the arm architecture compiled opencv library, then the library will be compiled package upload to arm architecture. (Follow-up put compiled library links)
First execute:
tar zxcf python3_cv2.tar.gz
mv python3_cv2 / python3.5 / Site-Packages Standard Package / cv2.cpython-35m-aarch64-linux-gnu.so /usr/local/lib/python3.5/dist-packages/
RM python3_cv2 / python3.5 / -r
mv python3_cv2 / * / usr / local / lib /
Verification of use in python opencv feasibility
Run error, in execution:
sudo install python3 APT-numpy
