在Eclipse Luna中安装OpenCV。我编写了一个示例应用程序，如下所示：

#include <cv.h>
#include <highgui.h>
#include<iostream>

using namespace cv;

int main( int argc, char** argv )
{
  Mat image;
  image = imread( argv[1], 1 );

  if( argc != 2 || !image.data )
    {
      printf( "No image data \n" );
      return -1;
    }

  namedWindow( "Display Image", CV_WINDOW_AUTOSIZE );
  imshow( "Display Image", image );

  waitKey(0);

  return 0;
}

在我的项目属性中，我已将/usr/local/include/opencv包含在(Project->Properties->C/C++ Build->Settings->Tool Settings -> GCC C++ Compiler -> Includes -> Include Paths. )中
和(Project->Properties->C/C++ Build->Settings->Tool Settings -> GCC C++ Linker -> Libraries -> Library Search Path. )中的/usr/local/lib
命令pkg-config --cflags opencv的输出是-I/usr/local/include/opencv -I/usr/local/include
pkg-config --libs opencv的输出是

-L/usr/local/lib -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_viz -lopencv_adas -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_datasets -lopencv_face -lopencv_latentsvm -lopencv_objdetect -lopencv_line_descriptor -lopencv_optflow -lopencv_reg -lopencv_rgbd -lopencv_saliency -lopencv_stereo -lopencv_surface_matching -lopencv_text -lopencv_tracking -lopencv_xfeatures2d -lopencv_shape -lopencv_video -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_ml -lopencv_flann -lopencv_xobjdetect -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core -lopencv_hal

当我尝试构建我的项目时，我得到了以下错误。

‘imread’ was not declared in this scope 
‘imshow’ was not declared in this scope 
‘namedWindow’ was not declared in this scope    
‘waitKey’ was not declared in this scope    
Function 'imread' could not be resolved 
Function 'imshow' could not be resolved 
Function 'namedWindow' could not be resolved
Function 'waitKey' could not be resolved

谁能帮我解决这个问题，并解释我错过了什么。