c++ - 使用 OpenCV 的 Qt Creator C++ 中的 undefined variable

Question

我在我的 qt creator 中遇到问题，这是 Qt Creator 显示的问题:

D:\Kuliah\Semester 5\IF431316 PECI\Qt Project File\Sobel\main.cpp:39: error: undefined reference to cv::imread(cv::String const&, int)
D:\Kuliah\Semester 5\IF431316 PECI\Qt Project File\Sobel\main.cpp:60: error: undefined reference to cv::namedWindow(cv::String const&, int)
D:\Kuliah\Semester 5\IF431316 PECI\Qt Project File\Sobel\main.cpp:61: error: undefined reference to cv::imshow(cv::String const&, cv::_InputArray const&)
D:\Kuliah\Semester 5\IF431316 PECI\Qt Project File\Sobel\main.cpp:64: error: undefined reference to cv::namedWindow(cv::String const&, int)
D:\Kuliah\Semester 5\IF431316 PECI\Qt Project File\Sobel\main.cpp:65: error: undefined reference to cv::imshow(cv::String const&, cv::_InputArray const&)
D:\Kuliah\Semester 5\IF431316 PECI\Qt Project File\build-Sobel-Desktop-Debug\debug\main.o:-1: In function `ZN2cv6StringC1EPKc': collect2.exe:-1: error: error: ld returned 1 exit status

这是我的包含库的 .pro 文件，我尝试按照许多成员的建议添加一些库，但什么也没有发生，情况越来越糟

TEMPLATE = app
CONFIG += console c++11
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += main.cpp

INCLUDEPATH += C:\\opencv\\build\\include \
INCLUDEPATH += C:\\opencv\\sources\\include \

LIBS += -LC:\\opencv\\sources\Built_with_Qt\\debug\\lib \
  -lopencv_calib3d231d \
  -lopencv_contrib231d \
  -lopencv_core231d \
  -lopencv_features2d231d \
  -lopencv_flann231d \
  -lopencv_gpu231d \
  -lopencv_highgui231d \
  -lopencv_imgproc231d \
  -lopencv_legacy231d \
  -lopencv_ml231d \
  -lopencv_objdetect231d \
  -lopencv_ts231d \
  -lopencv_video231d

Answer 1

错误的斜线方向。即使是 windows 平台，Qt 也使用 Linux 风格的目录分隔符。

INCLUDEPATH += C:/opencv/build/include \
INCLUDEPATH += C:/opencv/sources/include \

LIBS += -LC:/opencv/sources/Built_with_Qt/debug/lib \
  -lopencv_calib3d231d \
  -lopencv_contrib231d \
  -lopencv_core231d \
  -lopencv_features2d231d \
  -lopencv_flann231d \
  -lopencv_gpu231d \
  -lopencv_highgui231d \
  -lopencv_imgproc231d \
  -lopencv_legacy231d \
  -lopencv_ml231d \
  -lopencv_objdetect231d \
  -lopencv_ts231d \
  -lopencv_video231d

我看到的另一个问题是您正在使用 namedWindow。如果你有 Qt，那么你不应该使用它，因为 Qt 在窗口上提供，这更方便。

显然您正在使用 OpenCV 的一些自定义构建。您确定它没有以停用不需要的 Qt 功能的方式配置吗？