Undefined reference when using Cmake and QtCreator

I'm running the basic OpenCV example with OpenCV3.0.0 dev:

project(ImageDenoise) cmake_minimum_required(VERSION 2.8) aux_source_directory(. SRC_LIST) find_package(OpenCV REQUIRED) include_directories( ${OpenCV_INCLUDE_DIRS} ) add_executable(${PROJECT_NAME} ${SRC_LIST}) target_link_libraries(${PROJECT_NAME} ${OpenCV_LIBS}) MESSAGE(${OpenCV_LIBS}) MESSAGE(${OpenCV_INCLUDE_DIRS}) 

Source code:

#include <iostream> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> using namespace cv; using namespace std; int main(int argc, char* argv[] ) { if ( argc != 2 ) { printf("usage: DisplayImage.out <Image_Path>\n"); return -1; } Mat image; image = imread( argv[1], IMREAD_COLOR ); if ( !image.data ) { printf("No image data \n"); return -1; } namedWindow("Display Image", WINDOW_AUTOSIZE ); imshow("Display Image", image); waitKey(0); return 0; } 

When I import this project into QtCreator, I got the following linking errors when building project:

[100%] Building CXX object CMakeFiles/ImageDenoise.dir/main.cpp.o Linking CXX executable ImageDenoise CMakeFiles/ImageDenoise.dir/main.cpp.o: In function `main': main.cpp:(.text+0x7c): undefined reference to `cv::imread(cv::String const&, int)' main.cpp:(.text+0xf5): undefined reference to `cv::namedWindow(cv::String const&, int)' main.cpp:(.text+0x144): undefined reference to `cv::imshow(cv::String const&, cv::_InputArray const&)' 

However when I run cmake from command line and using make, then it works perfectly. What is the reason behind this?

dzung@Cronus:~/kSVD/build$ make Scanning dependencies of target ImageDenoise [100%] Building CXX object CMakeFiles/ImageDenoise.dir/main.cpp.o Linking CXX executable ImageDenoise [100%] Built target ImageDenoise dzung@Cronus:~/kSVD/build$ ls CMakeCache.txt CMakeFiles cmake_install.cmake ImageDenoise Makefile dzung@Cronus:~/kSVD/build$ ./ImageDenoise usage: DisplayImage.out <Image_Path>