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./build.sh不成功 #316

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chenzhwsysu57 opened this issue Nov 27, 2020 · 1 comment
Open

./build.sh不成功 #316

chenzhwsysu57 opened this issue Nov 27, 2020 · 1 comment

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@chenzhwsysu57
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我在Linux下编译EasyPR项目时遇到的问题：
使用Ubuntu系统进行初次编译，报错如下： (check one with "x")

CMake Error at CMakeLists.txt:13 (find_package):
  Could not find a configuration file for package "OpenCV" that is compatible
  with requested version "3.1.0".

  The following configuration files were considered but not accepted:

    /usr/local/lib/cmake/opencv4/OpenCVConfig.cmake, version: 4.5.1

修改了13行的version为4.5.1，并修改/thirdpart/CMakeList.txt对应find_package为4.5.1，可以开始build，但后来报错信息如下：

-- The C compiler identification is GNU 9.3.0
-- The CXX compiler identification is GNU 9.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found OpenCV: /usr/local (found suitable version "4.5.1", minimum required is "4.5.1") 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/zww/Desktop/EasyPR/build
Scanning dependencies of target thirdparty
[  3%] Building CXX object thirdparty/CMakeFiles/thirdparty.dir/textDetect/erfilter.cpp.o
[  7%] Building CXX object thirdparty/CMakeFiles/thirdparty.dir/xmlParser/xmlParser.cpp.o
[ 11%] Building CXX object thirdparty/CMakeFiles/thirdparty.dir/LBP/helper.cpp.o
[ 14%] Building CXX object thirdparty/CMakeFiles/thirdparty.dir/mser/mser2.cpp.o
[ 18%] Building CXX object thirdparty/CMakeFiles/thirdparty.dir/LBP/lbp.cpp.o
Scanning dependencies of target easypr
[ 22%] Building CXX object CMakeFiles/easypr.dir/src/core/core_func.cpp.o
[ 25%] Building CXX object CMakeFiles/easypr.dir/src/core/chars_identify.cpp.o
[ 29%] Building CXX object CMakeFiles/easypr.dir/src/core/chars_recognise.cpp.o
[ 33%] Building CXX object CMakeFiles/easypr.dir/src/core/chars_segment.cpp.o
[ 37%] Building CXX object CMakeFiles/easypr.dir/src/core/feature.cpp.o
[ 40%] Building CXX object CMakeFiles/easypr.dir/src/core/plate_detect.cpp.o
In file included from /usr/local/include/opencv4/opencv2/core.hpp:54,
                 from /usr/local/include/opencv4/opencv2/opencv.hpp:52,
                 from /home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:18:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp: In function ‘cv::Mat libfacerec::argsort(cv::InputArray, bool)’:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:92:18: error: ‘CV_StsBadArg’ was not declared in this scope
   92 |         CV_Error(CV_StsBadArg, "cv::argsort only sorts 1D matrices.");
      |                  ^~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:94:17: error: ‘CV_SORT_EVERY_ROW’ was not declared in this scope
   94 |     int flags = CV_SORT_EVERY_ROW+(ascending ? CV_SORT_ASCENDING : CV_SORT_DESCENDING);
      |                 ^~~~~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:94:48: error: ‘CV_SORT_ASCENDING’ was not declared in this scope
   94 |     int flags = CV_SORT_EVERY_ROW+(ascending ? CV_SORT_ASCENDING : CV_SORT_DESCENDING);
      |                                                ^~~~~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:94:68: error: ‘CV_SORT_DESCENDING’ was not declared in this scope
   94 |     int flags = CV_SORT_EVERY_ROW+(ascending ? CV_SORT_ASCENDING : CV_SORT_DESCENDING);
      |                                                                    ^~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/opencv4/opencv2/core.hpp:54,
                 from /usr/local/include/opencv4/opencv2/opencv.hpp:52,
                 from /home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:18:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp: In function ‘cv::Mat libfacerec::histc(cv::InputArray, int, int, bool)’:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:145:18: error: ‘CV_StsUnmatchedFormats’ was not declared in this scope
  145 |         CV_Error(CV_StsUnmatchedFormats, "This type is not implemented yet."); break;
      |                  ^~~~~~~~~~~~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp: In function ‘void libfacerec::sortMatrixColumnsByIndices(cv::InputArray, cv::InputArray, cv::OutputArray)’:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:157:15: error: ‘CV_StsBadArg’ was not declared in this scope
  157 |      CV_Error(CV_StsBadArg, error_message);
      |               ^~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp: In function ‘void libfacerec::sortMatrixRowsByIndices(cv::InputArray, cv::InputArray, cv::OutputArray)’:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:182:15: error: ‘CV_StsBadArg’ was not declared in this scope
  182 |      CV_Error(CV_StsBadArg, error_message);
      |               ^~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp: In function ‘cv::Mat libfacerec::asRowMatrix(cv::InputArrayOfArrays, int, double, double)’:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:207:18: error: ‘CV_StsBadArg’ was not declared in this scope
  207 |         CV_Error(CV_StsBadArg, "The data is expected as InputArray::STD_VECTOR_MAT (a std::vector<Mat>) or _InputArray::STD_VECTOR_VECTOR (a std::vector< vector<...> >).");
      |                  ^~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:222:81: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘size_t’ {aka ‘long unsigned int’} [-Wformat=]
  222 |             string error_message = format("Wrong number of elements in matrix #%d! Expected %d was %d.", i, d, src.getMat(i).total());
      |                                                                                ~^                        ~
      |                                                                                 |                        |
      |                                                                                 int                      size_t {aka long unsigned int}
      |                                                                                %ld
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:222:94: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘size_t’ {aka ‘long unsigned int’} [-Wformat=]
  222 |             string error_message = format("Wrong number of elements in matrix #%d! Expected %d was %d.", i, d, src.getMat(i).total());
      |                                                                                             ~^              ~
      |                                                                                              |              |
      |                                                                                              int            size_t {aka long unsigned int}
      |                                                                                             %ld
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:222:101: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘size_t’ {aka ‘long unsigned int’} [-Wformat=]
  222 |             string error_message = format("Wrong number of elements in matrix #%d! Expected %d was %d.", i, d, src.getMat(i).total());
      |                                                                                                    ~^          ~~~~~~~~~~~~~~~~~~~~~
      |                                                                                                     |                             |
      |                                                                                                     int                           size_t {aka long unsigned int}
      |                                                                                                    %ld
In file included from /usr/local/include/opencv4/opencv2/core.hpp:54,
                 from /usr/local/include/opencv4/opencv2/opencv.hpp:52,
                 from /home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:18:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:223:22: error: ‘CV_StsBadArg’ was not declared in this scope
  223 |             CV_Error(CV_StsBadArg, error_message);
      |                      ^~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp: In function ‘cv::Mat libfacerec::asColumnMatrix(cv::InputArrayOfArrays, int, double, double)’:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:243:18: error: ‘CV_StsBadArg’ was not declared in this scope
  243 |         CV_Error(CV_StsBadArg, "The data is expected as InputArray::STD_VECTOR_MAT (a std::vector<Mat>) or _InputArray::STD_VECTOR_VECTOR (a std::vector< vector<...> >).");
      |                  ^~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:257:101: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘size_t’ {aka ‘long unsigned int’} [-Wformat=]
  257 |             string error_message = format("Wrong number of elements in matrix #%d! Expected %d was %d.", i, d, src.getMat(i).total());
      |                                                                                                    ~^          ~~~~~~~~~~~~~~~~~~~~~
      |                                                                                                     |                             |
      |                                                                                                     int                           size_t {aka long unsigned int}
      |                                                                                                    %ld
In file included from /usr/local/include/opencv4/opencv2/core.hpp:54,
                 from /usr/local/include/opencv4/opencv2/opencv.hpp:52,
                 from /home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:18:
/home/zww/Desktop/EasyPR/thirdparty/LBP/helper.cpp:258:22: error: ‘CV_StsBadArg’ was not declared in this scope
  258 |             CV_Error(CV_StsBadArg, error_message);
      |                      ^~~~~~~~~~~~
/usr/local/include/opencv4/opencv2/core/base.hpp:320:42: note: in definition of macro ‘CV_Error’
  320 | #define CV_Error( code, msg ) cv::error( code, msg, CV_Func, __FILE__, __LINE__ )
      |                                          ^~~~
In file included from /home/zww/Desktop/EasyPR/include/easypr/core/plate.hpp:15,
                 from /home/zww/Desktop/EasyPR/include/easypr/core/core_func.h:5,
                 from /home/zww/Desktop/EasyPR/src/core/chars_identify.cpp:3:
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp: In constructor ‘easypr::CharsIdentify::CharsIdentify()’:
/home/zww/Desktop/EasyPR/include/easypr/config.h:143:42: error: expected primary-expression before ‘>’ token
  143 |     model = ml::ANN_MLP::load<ml::ANN_MLP>(path);
      |                                          ^
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp:22:3: note: in expansion of macro ‘LOAD_ANN_MODEL’
   22 |   LOAD_ANN_MODEL(ann_, kDefaultAnnPath);
      |   ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/include/easypr/config.h:143:42: error: expected primary-expression before ‘>’ token
  143 |     model = ml::ANN_MLP::load<ml::ANN_MLP>(path);
      |                                          ^
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp:23:3: note: in expansion of macro ‘LOAD_ANN_MODEL’
   23 |   LOAD_ANN_MODEL(annChinese_, kChineseAnnPath);
      |   ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/include/easypr/config.h:143:42: error: expected primary-expression before ‘>’ token
  143 |     model = ml::ANN_MLP::load<ml::ANN_MLP>(path);
      |                                          ^
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp:24:3: note: in expansion of macro ‘LOAD_ANN_MODEL’
   24 |   LOAD_ANN_MODEL(annGray_, kGrayAnnPath);
      |   ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp: In member function ‘void easypr::CharsIdentify::LoadModel(std::string)’:
/home/zww/Desktop/EasyPR/include/easypr/config.h:143:42: error: expected primary-expression before ‘>’ token
  143 |     model = ml::ANN_MLP::load<ml::ANN_MLP>(path);
      |                                          ^
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp:36:5: note: in expansion of macro ‘LOAD_ANN_MODEL’
   36 |     LOAD_ANN_MODEL(ann_, path);
      |     ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp: In member function ‘void easypr::CharsIdentify::LoadChineseModel(std::string)’:
/home/zww/Desktop/EasyPR/include/easypr/config.h:143:42: error: expected primary-expression before ‘>’ token
  143 |     model = ml::ANN_MLP::load<ml::ANN_MLP>(path);
      |                                          ^
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp:44:5: note: in expansion of macro ‘LOAD_ANN_MODEL’
   44 |     LOAD_ANN_MODEL(annChinese_, path);
      |     ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp: In member function ‘void easypr::CharsIdentify::LoadGrayChANN(std::string)’:
/home/zww/Desktop/EasyPR/include/easypr/config.h:143:42: error: expected primary-expression before ‘>’ token
  143 |     model = ml::ANN_MLP::load<ml::ANN_MLP>(path);
      |                                          ^
/home/zww/Desktop/EasyPR/src/core/chars_identify.cpp:52:5: note: in expansion of macro ‘LOAD_ANN_MODEL’
   52 |     LOAD_ANN_MODEL(annGray_, path);
      |     ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/core_func.cpp: In function ‘cv::Mat easypr::showResult(const cv::Mat&, int)’:
/home/zww/Desktop/EasyPR/src/core/core_func.cpp:2426:27: error: ‘CV_WINDOW_AUTOSIZE’ was not declared in this scope
 2426 |     namedWindow("EasyPR", CV_WINDOW_AUTOSIZE);
      |                           ^~~~~~~~~~~~~~~~~~
make[2]: *** [thirdparty/CMakeFiles/thirdparty.dir/build.make:89: thirdparty/CMakeFiles/thirdparty.dir/LBP/helper.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
[ 44%] Building CXX object CMakeFiles/easypr.dir/src/core/plate_judge.cpp.o
make[2]: *** [CMakeFiles/easypr.dir/build.make:76: CMakeFiles/easypr.dir/src/core/chars_identify.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [CMakeFiles/easypr.dir/build.make:63: CMakeFiles/easypr.dir/src/core/core_func.cpp.o] Error 1
/home/zww/Desktop/EasyPR/src/core/feature.cpp: In function ‘void easypr::getHistogramFeatures(const cv::Mat&, cv::Mat&)’:
/home/zww/Desktop/EasyPR/src/core/feature.cpp:36:30: error: ‘CV_RGB2GRAY’ was not declared in this scope
   36 |   cvtColor(image, grayImage, CV_RGB2GRAY);
      |                              ^~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp:41:47: error: ‘CV_THRESH_OTSU’ was not declared in this scope
   41 |   threshold(grayImage, img_threshold, 0, 255, CV_THRESH_OTSU + CV_THRESH_BINARY);
      |                                               ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp:41:64: error: ‘CV_THRESH_BINARY’ was not declared in this scope
   41 |   threshold(grayImage, img_threshold, 0, 255, CV_THRESH_OTSU + CV_THRESH_BINARY);
      |                                                                ^~~~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp: In function ‘void easypr::getColorFeatures(const cv::Mat&, cv::Mat&)’:
/home/zww/Desktop/EasyPR/src/core/feature.cpp:53:26: error: ‘CV_BGR2HSV’ was not declared in this scope
   53 |   cvtColor(src, src_hsv, CV_BGR2HSV);
      |                          ^~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp: In function ‘void easypr::getHOGFeatures(const cv::Mat&, cv::Mat&)’:
/home/zww/Desktop/EasyPR/src/core/feature.cpp:111:21: error: ‘cvSize’ was not declared in this scope
  111 |   HOGDescriptor hog(cvSize(128, 64), cvSize(16, 16), cvSize(8, 8), cvSize(8, 8), 3); //these parameters work well
      |                     ^~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp: In function ‘void easypr::getLBPFeatures(const cv::Mat&, cv::Mat&)’:
/home/zww/Desktop/EasyPR/src/core/feature.cpp:136:30: error: ‘CV_RGB2GRAY’ was not declared in this scope
  136 |   cvtColor(image, grayImage, CV_RGB2GRAY);
      |                              ^~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp: In function ‘void easypr::getGrayPlusProject(const cv::Mat&, cv::Mat&)’:
/home/zww/Desktop/EasyPR/src/core/feature.cpp:380:43: error: ‘CV_THRESH_OTSU’ was not declared in this scope
  380 |   threshold(grayChar, binaryChar, 0, 255, CV_THRESH_OTSU + CV_THRESH_BINARY);
      |                                           ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp:380:60: error: ‘CV_THRESH_BINARY’ was not declared in this scope
  380 |   threshold(grayChar, binaryChar, 0, 255, CV_THRESH_OTSU + CV_THRESH_BINARY);
      |                                                            ^~~~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp: In function ‘void easypr::getLBPplusHistFeatures(const cv::Mat&, cv::Mat&)’:
/home/zww/Desktop/EasyPR/src/core/feature.cpp:445:30: error: ‘CV_RGB2GRAY’ was not declared in this scope
  445 |   cvtColor(image, grayImage, CV_RGB2GRAY);
      |                              ^~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp:458:5: error: ‘CV_THRESH_OTSU’ was not declared in this scope
  458 |     CV_THRESH_OTSU + CV_THRESH_BINARY);
      |     ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/feature.cpp:458:22: error: ‘CV_THRESH_BINARY’ was not declared in this scope
  458 |     CV_THRESH_OTSU + CV_THRESH_BINARY);
      |                      ^~~~~~~~~~~~~~~~
make[2]: *** [CMakeFiles/easypr.dir/build.make:115: CMakeFiles/easypr.dir/src/core/feature.cpp.o] Error 1
In file included from /home/zww/Desktop/EasyPR/include/easypr/core/plate.hpp:15,
                 from /home/zww/Desktop/EasyPR/include/easypr/core/plate_judge.h:4,
                 from /home/zww/Desktop/EasyPR/src/core/plate_judge.cpp:1:
/home/zww/Desktop/EasyPR/src/core/plate_judge.cpp: In constructor ‘easypr::PlateJudge::PlateJudge()’:
/home/zww/Desktop/EasyPR/include/easypr/config.h:141:34: error: expected primary-expression before ‘>’ token
  141 |     model = ml::SVM::load<ml::SVM>(path);
      |                                  ^
/home/zww/Desktop/EasyPR/src/core/plate_judge.cpp:20:7: note: in expansion of macro ‘LOAD_SVM_MODEL’
   20 |       LOAD_SVM_MODEL(svm_, kLBPSvmPath);
      |       ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/include/easypr/config.h:141:34: error: expected primary-expression before ‘>’ token
  141 |     model = ml::SVM::load<ml::SVM>(path);
      |                                  ^
/home/zww/Desktop/EasyPR/src/core/plate_judge.cpp:24:7: note: in expansion of macro ‘LOAD_SVM_MODEL’
   24 |       LOAD_SVM_MODEL(svm_, kHistSvmPath);
      |       ^~~~~~~~~~~~~~
/home/zww/Desktop/EasyPR/src/core/plate_judge.cpp: In member function ‘void easypr::PlateJudge::LoadModel(std::string)’:
/home/zww/Desktop/EasyPR/include/easypr/config.h:141:34: error: expected primary-expression before ‘>’ token
  141 |     model = ml::SVM::load<ml::SVM>(path);
      |                                  ^
/home/zww/Desktop/EasyPR/src/core/plate_judge.cpp:33:7: note: in expansion of macro ‘LOAD_SVM_MODEL’
   33 |       LOAD_SVM_MODEL(svm_, path);
      |       ^~~~~~~~~~~~~~
make[2]: *** [CMakeFiles/easypr.dir/build.make:141: CMakeFiles/easypr.dir/src/core/plate_judge.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:126: CMakeFiles/easypr.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/Makefile2:153: thirdparty/CMakeFiles/thirdparty.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

猜测类似于 ‘CV_THRESH_OTSU’ was not declared in this scope的报错是由于openCV4.5.1版本不再使用CV_前缀，但其他报错不知道是什么原因，请问有什么办法可以不重新安装openCV的3.1.0版本而解决这个问题吗？

  • System: Ubuntu20.04.1 LTS

  • Compiler version/IDE: gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0

  • CMake version: 3.16.3

  • **OpenCV version:**4.5.1-pre
@baizhenmao95
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同样的报错，请问你有解决吗？

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@baizhenmao95 @chenzhwsysu57