I am not able to reproduce the problem - but I do not use vcpkg (so maybe there is problem):
1. I used official opencv for windows https://netix.dl.sourceforge.net/project/opencvlibrary/4.5.1/opencv-4.5.1-vc14_vc15.exe -> Installed to F:\opencv2 2. Because of using opencv2 I prefer to use "minimalistic tesseract" as described in https://spell.linux.sk/building-minimalistic-tesseract 3. As input image I used https://user-images.githubusercontent.com/71965365/94549264-84b00980-0284-11eb-9a28-0135d8c74de1.jpg 4. If there any strange behaviour you should use official training data: e.g. I used https://github.com/tesseract-ocr/tessdata_best/blob/master/eng.traineddata 5. Modified code (tess_cv.cpp) looks like this: #include <tesseract/baseapi.h> #include <leptonica/allheaders.h> #include <opencv2/opencv.hpp> int main() { std::string imPath = "image.jpeg"; cv::Mat im = cv::imread(imPath, cv::IMREAD_GRAYSCALE); setMsgSeverity(9); // turn off leptonica messages tesseract::TessBaseAPI* ocr = new tesseract::TessBaseAPI(); if (ocr->Init(NULL, "eng")) { std::cout << "Failed to initialize." << std::endl; } else { ocr->SetVariable("user_defined_dpi", "96"); ocr->SetImage(im.data, im.cols, im.rows, 1, im.cols); std::cout << "test1" << std::endl; char* str = ocr->GetUTF8Text(); std::cout << str << std::endl; std::cout << "test2" << std::endl; ocr->Clear(); ocr->End(); delete ocr; if (str) delete[] str; } system("pause"); } 6. Compiled from command line with: cl /EHsc tess_cv.cpp /If:\win64_msvc_min\include /If:\opencv2\opencv\build\include /link /LIBPATH:F:/WIN64_MSVC_MIN/LIB /LIBPATH:F:/WIN64_MSVC_MIN/LIB /LIBPATH:f:\opencv2\opencv\build\x64\vc15\lib\ tesseract50.lib leptonica-1.81.0.lib opencv_world451.lib /machine:x64 /out:tess_cv.exe Output of tess_cv.exe: test1 Python3WebSpider test2 8. The statement *using namespace std* is generally *considered* bad practice and is known (in past) to cause compilation errors with tesseract. Zdenko št 31. 12. 2020 o 21:22 Minseok Kim <minseok.eric....@gmail.com> napísal(a): > #include <iostream> > #include <string> > #include <tesseract/baseapi.h> > #include <leptonica/allheaders.h> > #include <opencv2/opencv.hpp> > > using namespace std; > using namespace cv; > > int main() > { > string outText = "", imPath = "image.jpeg"; > Mat im = cv::imread(imPath, cv::IMREAD_GRAYSCALE); > cv::bitwise_not(im, im); > cv::imwrite("image_inverted.jpeg", im); > > tesseract::TessBaseAPI* ocr = new tesseract::TessBaseAPI(); > > if (ocr->Init(NULL, "Impact")) > { > cout << "Failed to initialize." << endl; > } > else > { > //ocr->SetVariable("tessedit_char_whitelist", "ABCDEFGHIJKLMNOP"); > ocr->SetVariable("user_defined_dpi", "96"); > //ocr->SetVariable("unlv_tilde_crunching", "false"); > //ocr->SetImage(im.data, im.cols, im.rows, 1, im.cols); > Pix* image = pixRead("image_inverted.jpeg"); > ocr->SetImage(image); > > cout << "test1" << endl; > char* str = ocr->GetUTF8Text(); > outText = string(str); > cout << outText << endl; > cout << "test2" << endl; > > ocr->Clear(); > //ocr->End(); > > delete ocr; > if (str) > delete[] str; > pixDestroy(&image); > } > > system("pause"); > } > > VS2019 - v142 > Windows 10 > vcpkg build of Tesseract (static libs) - 4.1.1#5 > > -- > You received this message because you are subscribed to the Google Groups > "tesseract-ocr" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to tesseract-ocr+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tesseract-ocr/774d1a41-1e6e-4bcd-951f-290e3b65e723n%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/774d1a41-1e6e-4bcd-951f-290e3b65e723n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAJbzG8yBrcfwfhbrR9HupaUHVzXG3HFKgr7cr3Zxo7TFpUsj4A%40mail.gmail.com.
