ubuntu下opencv使用cvNamedWindow()和cvShowImage()出错的解决方法
重装系统和opencv，编译运行显示一副图像的程序，报错如下
1 liurf@liurf-Lenovo-G470:~/WorkSpace/slambook-master/ch5/imageBasics$ ./imageBasics ubuntu.png 2 图像宽为1200,高为674,通道数为3 3 OpenCV Error: Unspecified error (The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script) in cvShowImage, file /home/liurf/opencv/modules/highgui/src/window.cpp, line 501 4 terminate called after throwing an instance of 'cv::Exception' 5 what(): /home/liurf/opencv/modules/highgui/src/window.cpp:501: error: (-2) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function cvShowImage 6 7 已放弃 (核心已转储)
根据提示安装gtk2.0和pkg-config，运行不了，仔细看。
我们进入到opencv源代码库，找到highgui库下面，具体路径“/home/liurf/opencv/modules/highgui”，依次运行“cmake .”，"make -j4"，"sudo make install"，之后再进入我们的程序下面重新编译运行就一切正常了。
每次编译opencv都会出现，解决了就没管它，还是记下来省得百度浪费时间。
