运行错误：“...error while loading shared libraries: libopencv_core.so.3.4...”

环境：Ubuntu 14.04 + OpenCV 3.4.1 + QT
问题：EasyPR安装，命令模式下运行Demo都没问题，在QT环境中 测试代码如下：
int main(void)
{
// QCoreApplication a(argc, argv);
// return a.exec();
CPlateRecognize pr;
pr.setResultShow(false);
pr.setDetectType(PR_DETECT_CMSER);

vector plateVec;
Mat src = imread("/home/liu/EasyPR-master/result.jpg");
int result = pr.plateRecognize(src, plateVec);

}

Debug 时 没有错误，但出现很多警告，弹出窗口显示：
/home/liu/code/build-EasyPR-Desktop-Debug/EasyPR: error while loading shared libraries: libopencv_core.so.3.4: cannot open shared object file: No such file or directory
Press to close this window...

请问各位大神，不知这个错误跟哪个文件有关，如何修改？
我的.Pro 如下：
#-------------------------------------------------
#
# Project created by QtCreator 2018-07-03T15:26:40
#
#-------------------------------------------------

QT += core

QT -= gui

TARGET = EasyPR
CONFIG += console
CONFIG -= app_bundle
CONFIG += c++11

TEMPLATE = app

SOURCES += main.cpp \
EasyPR-Lib/src/core/chars_identify.cpp \
EasyPR-Lib/src/core/chars_recognise.cpp \
EasyPR-Lib/src/core/chars_segment.cpp \
EasyPR-Lib/src/core/core_func.cpp \
EasyPR-Lib/src/core/feature.cpp \
EasyPR-Lib/src/core/params.cpp \
EasyPR-Lib/src/core/plate_detect.cpp \
EasyPR-Lib/src/core/plate_judge.cpp \
EasyPR-Lib/src/core/plate_locate.cpp \
EasyPR-Lib/src/core/plate_recognize.cpp \
EasyPR-Lib/src/train/annCh_train.cpp \
EasyPR-Lib/src/train/ann_train.cpp \
EasyPR-Lib/src/train/create_data.cpp \
EasyPR-Lib/src/train/svm_train.cpp \
EasyPR-Lib/src/train/train.cpp \
EasyPR-Lib/src/util/kv.cpp \
EasyPR-Lib/src/util/program_options.cpp \
EasyPR-Lib/src/util/util.cpp \
EasyPR-Lib/thirdparty/LBP/helper.cpp \
EasyPR-Lib/thirdparty/LBP/lbp.cpp \
EasyPR-Lib/thirdparty/mser/mser2.cpp \
EasyPR-Lib/thirdparty/svm/corrected_svm.cpp \
EasyPR-Lib/thirdparty/textDetect/erfilter.cpp \
EasyPR-Lib/thirdparty/xmlParser/xmlParser.cpp

INCLUDEPATH += /usr/local/include \
/usr/local/include/opencv \
/usr/local/include/opencv2 \
/home/liu/code/EasyPR/EasyPR-Lib/include \
/home/liu/code/EasyPR/EasyPR-Lib/include/easypr \
/home/liu/code/EasyPR/EasyPR-Lib \
/home/liu/code/EasyPR/EasyPR-Lib/test

LIBS += /usr/local/lib/x86_64-linux-gnu/libopencv_core.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_highgui.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_imgcodecs.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_imgproc.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_objdetect.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_face.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_ml.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_shape.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_text.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_video.so.3.4.1 \
/usr/local/lib/x86_64-linux-gnu/libopencv_core.so.3.4

HEADERS += \
EasyPR-Lib/thirdparty/LBP/helper.hpp \
EasyPR-Lib/thirdparty/LBP/lbp.hpp \
EasyPR-Lib/thirdparty/mser/mser2.hpp \
EasyPR-Lib/thirdparty/svm/precomp.hpp \
EasyPR-Lib/thirdparty/textDetect/erfilter.hpp \
EasyPR-Lib/thirdparty/xmlParser/xmlParser.h \
EasyPR-Lib/include/easypr/core/character.hpp \
EasyPR-Lib/include/easypr/core/chars_identify.h \
EasyPR-Lib/include/easypr/core/chars_recognise.h \
EasyPR-Lib/include/easypr/core/chars_segment.h \
EasyPR-Lib/include/easypr/core/core_func.h \
EasyPR-Lib/include/easypr/core/feature.h \
EasyPR-Lib/include/easypr/core/params.h \
EasyPR-Lib/include/easypr/core/plate.hpp \
EasyPR-Lib/include/easypr/core/plate_detect.h \
EasyPR-Lib/include/easypr/core/plate_judge.h \
EasyPR-Lib/include/easypr/core/plate_locate.h \
EasyPR-Lib/include/easypr/core/plate_recognize.h \
EasyPR-Lib/include/easypr/train/annCh_train.h \
EasyPR-Lib/include/easypr/train/ann_train.h \
EasyPR-Lib/include/easypr/train/create_data.h \
EasyPR-Lib/include/easypr/train/svm_train.h \
EasyPR-Lib/include/easypr/train/train.h \
EasyPR-Lib/include/easypr/util/kv.h \
EasyPR-Lib/include/easypr/util/program_options.h \
EasyPR-Lib/include/easypr/util/switch.hpp \
EasyPR-Lib/include/easypr/util/util.h \
EasyPR-Lib/include/easypr/api.hpp \
EasyPR-Lib/include/easypr/config.h \
EasyPR-Lib/include/easypr/version.h \
EasyPR-Lib/include/easypr.h

OTHER_FILES += \
EasyPR-Lib/thirdparty/xmlParser/AFPL-license.txt

Start with the Qt qmake .pro file and its OpenCV LIBS entries, then compare how the command-line demo is launched with the Qt Creator executable. Verify the runtime library lookup for libopencv_core.so.3.4. Done means the executable built from the shown main.cpp starts and runs without the shared-library loading error.

Written by the indexing model from the issue text.