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在.pro文件中添加

INCLUDEPATH += C:\opencv\build\include\        #头文件路径
               C:\opencv\build\include\opencv\
               C:\opencv\build\include\opencv2

win32:CONFIG(debug, debug|release): {    #lib路径
LIBS += -LC:\opencv\build\x86\vc12\lib\ \
-lopencv_calib3d2410d \
-lopencv_contrib2410d \
-lopencv_core2410d \
-lopencv_features2d2410d \
-lopencv_flann2410d \
-lopencv_gpu2410d \
-lopencv_highgui2410d \
-lopencv_imgproc2410d \
-lopencv_legacy2410d \
-lopencv_ml2410d \
-lopencv_nonfree2410d\
-lopencv_objdetect2410d\
-lopencv_ocl2410d\
-lopencv_photo2410d\
-lopencv_stitching2410d\
-lopencv_superres2410d\
-lopencv_ts2410d\
-lopencv_video2410d\
-lopencv_videostab2410d

} else:win32:CONFIG(release, debug|release): {
LIBS += -LC:\opencv\build\x86\vc12\lib\ \
-lopencv_calib3d2410 \
-lopencv_contrib2410 \
-lopencv_core2410 \
-lopencv_features2d2410 \
-lopencv_flann2410 \
-lopencv_gpu2410 \
-lopencv_highgui2410 \
-lopencv_imgproc2410 \
-lopencv_legacy2410 \
-lopencv_ml2410 \
-lopencv_nonfree2410\
-lopencv_objdetect2410\
-lopencv_ocl2410\
-lopencv_photo2410\
-lopencv_stitching2410\
-lopencv_superres2410\
-lopencv_ts2410\
-lopencv_video2410\
-lopencv_videostab2410
}