在.pro中加入
INCLUDEPATH += /home/wby/opencv3/include \
/home/wby/opencv3/include/opencv \
/home/wby/opencv3/include/opencv2
LIBS += -L/home/wby/opencv3/lib/ -lopencv_highgui -lopencv_core -lopencv_imgproc -lopencv_imgcodecs -lopencv_video\
-lopencv_videostab -lopencv_videoio