連接opencv庫的麻煩

Question

我剛剛開始使用OpenCV。我有一個Raspberry Pi和Pi相機，我想學習OpenCV以用於機器視覺項目。我正在使用vi編寫C代碼，在Raspberry Pi上編寫。我對Linux有點新鮮，在編輯器中編寫代碼而不是在IDE中是絕對新的！

我能夠從Github上下載OpenCV倉庫並編譯它，而不麻煩。 OpenCV（3.2.0）已安裝。

我開始按照這裏的教程：http://docs.opencv.org/2.4/doc/tutorials/introduction/linux_gcc_cmake/linux_gcc_cmake.html#linux-gcc-usage

我輸入正確的密碼，然後取得了CMake的文件。

這裏是我的CMakeLists.txt文件：

cmake_minimum_required(VERSION 2.8) 
project(DisplayImage) 
find_package(OpenCV COMPONENTS core imgproc highgui REQUIRED) 
add_executable(DisplayImage DisplayImage.cpp) 
target_link_libraries(DisplayImage ${OpenCCV_LIBS}) 
LINK_DIRECTORIES("/usr/local/lib") 

我試圖使該項目，但它似乎有錯誤鏈接庫。我是新手，無法確定它是否是版本衝突，庫缺失，或者只是鏈接器正在尋找錯誤位置的庫。

下面是當make命令由輸出：

pi@raspberrypi:~/Programming $ cmake . 
-- Found OpenCV: /usr/local (found version "3.2.0") found components:   core imgproc highgui 
-- Configuring done 
-- Generating done 
-- Build files have been written to: /home/pi/Programming 
pi@raspberrypi:~/Programming $ make 
[ 50%] Linking CXX executable DisplayImage 
CMakeFiles/DisplayImage.dir/DisplayImage.cpp.o: In function `main': 
DisplayImage.cpp:(.text+0x6c): undefined reference to `cv::imread(cv::String const&, int)' 
DisplayImage.cpp:(.text+0xd4): undefined reference to `cv::namedWindow(cv::String const&, int)' 
DisplayImage.cpp:(.text+0x118): undefined reference to `cv::imshow(cv::String const&, cv::_InputArray const&)' 
DisplayImage.cpp:(.text+0x138): undefined reference to `cv::waitKey(int)' 
CMakeFiles/DisplayImage.dir/DisplayImage.cpp.o: In function `cv::String::String(char const*)': 
DisplayImage.cpp:(.text._ZN2cv6StringC2EPKc[_ZN2cv6StringC5EPKc]+0x50): undefined reference to `cv::String::allocate(unsigned int)' 
CMakeFiles/DisplayImage.dir/DisplayImage.cpp.o: In function `cv::String::~String()': 
DisplayImage.cpp:(.text._ZN2cv6StringD2Ev[_ZN2cv6StringD5Ev]+0x14): undefined reference to `cv::String::deallocate()' 
CMakeFiles/DisplayImage.dir/DisplayImage.cpp.o: In function `cv::String::operator=(cv::String const&)': 
DisplayImage.cpp: (.text._ZN2cv6StringaSERKS0_[_ZN2cv6StringaSERKS0_]+0x30): undefined reference to `cv::String::deallocate()' 
CMakeFiles/DisplayImage.dir/DisplayImage.cpp.o: In function `cv::Mat::~Mat()': 
DisplayImage.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x3c): undefined reference to `cv::fastFree(void*)' 
CMakeFiles/DisplayImage.dir/DisplayImage.cpp.o: In function `cv::Mat::operator=(cv::Mat const&)': 
DisplayImage.cpp:(.text._ZN2cv3MataSERKS0_[_ZN2cv3MataSERKS0_]+0x140): undefined reference to `cv::Mat::copySize(cv::Mat const&)' 
CMakeFiles/DisplayImage.dir/DisplayImage.cpp.o: In function `cv::Mat::release()': 
DisplayImage.cpp:(.text._ZN2cv3Mat7releaseEv[_ZN2cv3Mat7releaseEv]+0x68): undefined reference to `cv::Mat::deallocate()' 
collect2: error: ld returned 1 exit status 
CMakeFiles/DisplayImage.dir/build.make:94: recipe for target 'DisplayImage' failed 
make[2]: *** [DisplayImage] Error 1 
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/DisplayImage.dir/all' failed 
make[1]: *** [CMakeFiles/DisplayImage.dir/all] Error 2 
Makefile:83: recipe for target 'all' failed 
make: *** [all] Error 2 
pi@raspberrypi:~/Programming $ 

下一步是什麼？在Linux中對鏈接錯誤進行故障排除的過程是什麼？/ OpenCV 您可以提供的任何見解都將不勝感激！

Answer 1

一些東西......

• 您已經在CMakeLists.txt

• 拼寫錯誤OpenCVV_LIBS我想你也需要include_directories(${OpenCV_INCLUDE_DIR})

• 我覺得亂源建立是首選，這意味着您創建一個名爲build的子目錄，但不在版本控制下，但在目錄中含CMakeLists.txt，cd build然後cmake ..