问使用Tesseract读取简单字母

EN

int main()
{
    cv::Mat lettersmat = cv::imread("letters.jpeg", cv::IMREAD_GRAYSCALE);
    cv::threshold(lettersmat, lettersmat, 128, 255, cv::THRESH_BINARY);
    
    tesseract::TessBaseAPI* ocr = new tesseract::TessBaseAPI();
    
    if (ocr->Init(NULL, "eng", tesseract::OEM_LSTM_ONLY) == 0)
        {
            ocr->SetVariable("user_defined_dpi", "96");
            ocr->SetImage(lettersmat.data, lettersmat.cols, lettersmat.rows, 1, lettersmat.step);
            std::string outText = std::string(ocr->GetUTF8Text());
    
            cout << "Text: " << endl;
            cout << outText.c_str() << endl;
    
            ocr->End();
        }
        else
        {
            cout << "Could not initialize Tesseract API." << endl;
        }
}