OpenCV подключение в проект Qt

Скачиваем OpenCV OpenCV-2.4.1.exe
Распаковываем
Правим pro файл
# OpenCV
OPENCV = D:/opencv
OPENCV_LIB = $$OPENCV/build/x86/vc9/lib
INCLUDEPATH += $$OPENCV/build/include/opencv $$OPENCV/build/include
QMAKE_LIBDIR += $$OPENCV_LIB
CONFIG(debug, debug|release) {
  LIBS += $$files($$OPENCV_LIB/*241d.lib)
} else {
  LIBS += $$files($$OPENCV_LIB/*241.lib)
}