Qt Creator找不到：opencv2 / opencv.hpp

Question

我正在使用Ubuntu 16.04LTS和Qt Creator。编译时，出现以下错误。

警告：找不到：opencv2 / opencv.hpp

我重新安装了OpenCV和Qt两次，但问题仍然存在。

请在下面找到* .pro文件

#-------------------------------------------------
#
# Project created by QtCreator 2018-07-13T12:41:30
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = Hello_OpenCV_Qt
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS


win32: {
include("c:/dev/opencv/opencv.pri")
}
unix: !macx {
CONFIG += link_pkgconfig
PKGCONFIG += opencv
}
unix: macx {
INCLUDEPATH += "/usr/local/include"
LIBS += -L"/usr/local/lib" \
-lopencv_world
}

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0


SOURCES += \
        main.cpp \

        mainwindow.cpp \


HEADERS += \
        mainwindow.h \

opencv2/opencv.hpp

FORMS += \
        mainwindow.ui

谢谢。