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image processing OpenCV-4.0.1测试

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[Ubuntu 16.04]OpenCV-4.0.1测试¶

参考:[Ubuntu 16.04]OpenCV-3.4测试

和之前OpenCV版本不同,OpenCV-4.0.1使用c++11,所以需要在配置文件中指定编译环境

`cmake`¶

参考:cmake增加C++11

$ cat CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
# 指定c++11
add_definitions(-std=c++11)
project( DisplayImage )
find_package( OpenCV REQUIRED )
MESSAGE("OpenCV version: ${OpenCV_VERSION}")
include_directories( ${OpenCV_INCLUDE_DIRS} )
add_executable( DisplayImage DisplayImage.cpp )
target_link_libraries( DisplayImage ${OpenCV_LIBS} )

`make`¶

$ cat makefile 
INCLUDE=$(shell pkg-config --cflags opencv)
LIB=$(shell pkg-config --libs opencv)
SOURCE=DisplayImage.cpp
RES=DisplayImage

$(RES):$(SOURCE)
    g++ -std=c++11 $(SOURCE) $(INCLUDE) $(LIB) -o $(RES)

clean:
    rm $(RES)

错误¶

参考:Linux locate ldconfig pkg-config ldd 以及 OpenCV C++库的使用

$ ./DisplayImage lena.jpg 
./DisplayImage: error while loading shared libraries: libopencv_highgui.so.4.0: cannot open shared object file: No such file or directory

系统找不到动态库,需要配置进行动态库的绑定,在路径/etc/ld.so.conf.d下新建配置文件opencv.conf并刷新

$ sudo vim opencv.conf
/home/zj/opencv/opencv-4.0.1/install/lib
$ sudo ldconfig