【安装相关软件和库】
1.安装CMAKE：这里使用apt-get来安装; CMAKE 是一个跨平台编译工具，能够输出各种makefile,和project 文件，指导编译器编译，对CMAKE具体的可以自行搜索，这里推荐一个链接：
http://www.cnblogs.com/lyq105/archive/2010/12/03/1895067.html
在联网下，在终端输入：
sudo apt-get install cmake
【编译、安装OPENCV】
1.从OPENCV官网下载OpenCV-3.2.0.zip
2.建议把OpenCV-3.2.0.zip 移动到主目录下；
mv [OpenCV-3.2.0.zip存放路径/opencv3.2.0.zip] ~/opencv_3.2.0.zip
3.配置CMAKE相关信息，默认安装目录，编译类型（DEBUG/RELEASE），对相关语言、环境的支持（如QT，Python）,
在终端输入：
cd ~
unzip opencv_3.2.0.zip
cd opencv-3.2.0
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..
-D WITH_QT=ON 这个选项表示支持QT，-D CMAKE_INSTALL_PREFIX=/usr/local 表示安装目录。
网上许多教程，都是建议在OpenCV下新建议个编译结果的目录，但是我尝试了很多种方法，最后直接在解压后的OpenCV 目录下 cmake 才成功了。
3.编译
在终端输入：
make -j($nproc)
-j表示用几个线程来编译，这样可以加快编译速度，不过这个与makefile的质量有关，有的工程用了-j会编译出错
4.安装
在终端输入：
sudo make install
5.配置环境变量
a.添加库路径：
sudo /bin/bash -c \'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf\'
这里使用了标准输出重定向，/usr/local OpenCV安装目录，在lib下有我们的.so库 ，把这“/usr/local/lib” “打印”--echo到/etc/ld.so.conf.d/opencv.conf\'
b.更新库路径：
sudo ldconfig
【新建OpenCV的HelloWorld】
一、利用Make 和pkgconfig ，g++ 编译
1. pkgconfig 只是提供g++一些-I -L 选项
在终端输入：
pkg-config --cflags --libs opencv
看到输出一些-I -L选项如下，即pkg-config 安装正确，OpenCV 安装正确。如未安装，请先安装；如果发现不正确，可以修改/usr/local/lib/pkgconfig/opencv.pc文件，这个文件就是opencv的目录配置。
-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
2.中间出现的错误和解决方法
g++ -o opencv_test opencv_test.cpp `pkg-config --cflags --libs opencv` -Wall
/usr/bin/ld: warning: libicui18n.so.54, needed by //home/yyh/anaconda2/lib/libQt5Core.so.5, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libicuuc.so.54, needed by //home/yyh/anaconda2/lib/libQt5Core.so.5, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libicudata.so.54, needed by //home/yyh/anaconda2/lib/libQt5Core.so.5, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libpng16.so.16, needed by //home/yyh/anaconda2/lib/libQt5Gui.so.5, not found (try using -rpath or -rpath-link)
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_clone_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_interlace_handling@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_IHDR@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_io_ptr@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_image_width@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `u_strToLower_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_longjmp_fn@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_gray_to_rgb@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_setMillis_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_bgr@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_valid@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_fromUnicode_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_write_rows@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_getDefaultName_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_PLTE@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_sig_bytes@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_write_chunk@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_pHYs@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_destroy_read_struct@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_inDaylightTime_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_x_pixels_per_meter@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_read_row@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_tRNS@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_get_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_close_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_error_fn@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_openTimeZones_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_toUnicode_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `u_strToUpper_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_close_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_packing@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_read_end@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_getMaxCharSize_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_countAvailable_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_read_fn@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_write_end@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_invert_mono@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_write_fn@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_tRNS@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_create_write_struct@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_getDefaultTimeZone_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_error@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_destroy_write_struct@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_packswap@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_text@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_strip_16@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_create_read_struct@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_oFFs@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `uenum_next_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_getStandardName_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucol_setAttribute_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_PLTE@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_compression_level@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucol_strcoll_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_text@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_setSubstChars_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_filler@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_gAMA@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_getTimeZoneDisplayName_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_openCountryTimeZones_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_open_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucol_open_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_IHDR@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucol_close_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucol_getSortKey_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_expand@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_getAvailableName_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_write_info@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_getDSTSavings_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_openTimeZoneIDEnumeration_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucal_open_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `u_errorName_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `uenum_close_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_oFFs@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_create_info_struct@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_read_update_info@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_write_image@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_gamma@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_getAlias_54\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_y_pixels_per_meter@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_image_height@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_read_image@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_read_info@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_set_gAMA@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Gui.so.5: undefined reference to `png_get_channels@PNG16_0\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_compareNames_54\'
//home/yyh/anaconda2/lib/libQt5Core.so.5: undefined reference to `ucnv_countAliases_54\'
原因：QT安装在了用户目录下，当时没有配置环境变量，出现了链接错误：
解决方案：
利用export 命令设置环境变量：[Qt安装目录下/version number /gcc_64/lib]
在终端输入（或~/.bashrc）：
export LD_LIBRARY_PATH=/home/yyh/Qt5.7.1/5.7/gcc_64/lib/
查找Qt路径的方法：
qmake -v
执行 ./opencv_test 出现下面的error，但是直接双击可以执行
This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".
Available platform plugins are: minimal, offscreen, xcb.
Reinstalling the application may fix this problem.
Aborted (core dumped)
解决方案：
关闭终端重新执行
4.opencv_test.cpp
#include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> #include <iostream> using namespace std; using namespace cv; #define PICTURE "./01.jpg" int main(void) { IplImage* img = cvLoadImage(PICTURE, 0); cvNamedWindow( "test", 0 ); cvShowImage("test", img); cvWaitKey(0); cvReleaseImage( &img ); cvDestroyWindow( "test" ); return 0; }
5.Makefile(赋值的时候注意TAB键)
CXX = g++
CFLAGS = -Wall
LDFLAGS = `pkg-config --cflags --libs opencv`
SRCS = $(wildcard *.cpp)
TARGETS = $(patsubst %.cpp, %,$(SRCS))
all:$(TARGETS)
$(TARGETS):$(SRCS)
$(CXX) -o $@ $< $(LDFLAGS) $(CFLAGS)
clean:
-rm -rf $(TARGETS) *~ .*swp
.PHONY: clean all
二、在 QT 下使用ＯpenCV
我尝试照着网上的教程试了一下，但是运行时出现下面的错误：（先不用到就先放着咯）
Starting /home/yyh/workspace/qt/opencv_test/build-opecv_test-Desktop_Qt_5_7_1_GCC_64bit-Debug/opecv_test...
Cannot mix incompatible Qt library (version 0x50600) with this library (version 0x50701)
The program has unexpectedly finished.
/home/yyh/workspace/qt/opencv_test/build-opecv_test-Desktop_Qt_5_7_1_GCC_64bit-Debug/opecv_test crashed.
照网络上的说法，应该去删除OpenCV 安装目录下的QT动态库，但是我目前没有找到
【参考链接】
http://jingyan.baidu.com/article/14bd256e466474bb6d2612db.html