Question

我正在使用支持人脸识别的2.4.7版opencv。但是我收到以下错误：

 /home/fereres/recognition-build-desktop- Qt_4_8_1_in_PATH__System__Release/../recognition/program.cpp:58: error: 'FaceRecognizer' was  not declared in this scope

编辑：该程序正在运行，因为我刚刚更换计算机。我按照相同的说明安装了OpenCV。什么可能导致该错误？我的QT专业文件如下：

       QT       += core
       QT       -= gui

      TARGET = identification
      CONFIG   += console/home/fereres/projectCV-build-desktop-        Qt_4_8_1_in_PATH__System__Release
      CONFIG   -= app_bundle

      TEMPLATE = app

      INCLUDEPATH += /home/fereres/Desktop/OpenCV/opencv-2.4.7/include/opencv \
      INCLUDEPATH += /home/fereres/Desktop/OpenCV/opencv-2.4.7/include/opencv2 \
      INCLUDEPATH +=  /home/fereres/Desktop/OpenCV/opencv-2.4.7/modules/core/include/opencv2/core

      LIBS += -L/home/fereres/Desktop/OpenCV/opencv-2.4.7/build/lib \
       -lopencv_core \
       -lopencv_imgproc \
       -lopencv_highgui \
       -lopencv_ml \
       -lopencv_video \
       -lopencv_features2d \
       -lopencv_calib3d \
       -lopencv_objdetect \
       -lopencv_contrib \
       -lopencv_legacy \
       -lopencv_flann

       SOURCES += \
          program.cpp \
          prediction.cpp \
          Detection.cpp

      HEADERS += \
          prediction.h \
          Detection.h

编译出来没有错误。但是，当我运行我的应用程序时，我得到了

 ./identification: error while loading shared libraries: libopencv_core.so.2.4: cannot  open shared object file: No such file or directory
  fereres@ubuntu:~/identification-build-desktop-Qt_4_8_1_in_PATH__System__Release$

/ usr / local / lib forlder只包含一个我无法在那里找到我的库的python文件夹。

EDIT2：我再次安装opencv，现在一切正常。我想安装opencv的最后一步没有用，所以我的/ usr / local文件夹是空的。现在一切都在掌控之中。

Answer 1

最好将INCLUDEPATH初始化调整为以下内容，否则在路径开头引用 opencv2 的每个#include语句都会导致编译错误：

INCLUDEPATH += "/home/fereres/Desktop/OpenCV/opencv-2.4.7/include" \
               "/home/fereres/Desktop/OpenCV/opencv-2.4.7/include/opencv" \
               "/home/fereres/Desktop/OpenCV/opencv-2.4.7/include/opencv2" \
               "/home/fereres/Desktop/OpenCV/opencv-2.4.7/modules/core/include/opencv2/core"

然后，在recognition/program.cpp，不要忘记包含相应的头文件：

#include <opencv2/contrib/contrib.hpp>

注意：由于您使用 pkg-config 添加所有OpenCV库，因此您无需执行此操作，但对于那些单独指定库的人员，你们需要将 opencv_contrib 添加到LIBS。

faceRecognizer未在此范围内声明

1 个答案: