Call tesseract__c++ in C + + and OpenCV

Reference address
Tesseract with C + + or OpenCV and some code trace 1.Tesseract Direct use in C + +

Tess.cpp: 
//Recognize text on a image using Tesseract API and print it to the screen
//Usage:./tess image.p ng

#include <tesseract/baseapi.h>
#include <tesseract/strngs.h>
#include <iostream>

int main (int argc, char** argv)
{
    if (argc!= 2)
    {
        std::cout << "Please specify the input image!" << Std::endl;
        return-1;
    }

    Const char* LANG = "eng";
    Const char* filename = argv[1];

    New Tess base class
    Tesseract::tessbaseapi Tess;

    Initialize
    Tess. Init (NULL, Lang, tesseract::oem_default);

    Set the recognition mode
    Tess. Setpagesegmode (tesseract::P sm_single_block);

    file* fin = fopen (filename, "RB");
    if (fin = = NULL)
    {
        std::cout << "Cannot open" << filename << std::endl;
        return-1;
    }
    Fclose (Fin);

    STRING text;

    To identify
    if (!tess. Processpages (filename, NULL, 0, &text))
    {
        std::cout << "Error during processing." << std:: Endl;
        return-1;
    }
    else
        std::cout << text.string () << Std::endl;

    return 0;
}

Ubuntu Compile command

g++-i/usr/local/include ' pkg-config--cflags--libs tesseract ' Tess.cpp-o Tess

The principal functions for OCR recognition are:

TESSERACT::TESSBASEAPI::
bool Tessbaseapi::P rocesspage (pix* Pix, int page_index, const char* filename,
                              const char* retry_config, int timeout_millisec,
                              string* text_out)

In the analysis process, focus on this API, location in Baseapi.cpp;

follow-up analysis; 2. Tesseract used in conjunction with OPENCV

You can select ROI and then OCR;

In order to identify the Cv::mat matrix, it is passed to Tessbaseapi::setimage ();

Use Tessbaseapi::getutf8text () to get the identified text;

Tesscv.cpp://Using tesseract API with OpenCV #include <opencv2/highgui/highgui.hpp> #include &LT;OPENCV2/IMGPR oc/imgproc.hpp> #include <tesseract/baseapi.h> #include <iostream> int main (int argc, char** argv) {/ /USAGE:TESSCV Image.png if (argc!= 2) {std::cout << "Please specify the input image!" << s
        Td::endl;
    return-1;
    }//Load image Cv::mat im = Cv::imread (argv[1]);
        if (Im.empty ()) {std::cout << "cannot open source image!" << Std::endl;
    return-1;
    } Cv::mat Gray;
    Cv::cvtcolor (IM, Gray, cv_bgr2gray);
    ... other image pre-processing ...//pass it to tesseract API Tesseract::tessbaseapi Tess; Tess.
    Init (NULL, "Eng", Tesseract::oem_default); Tess.
    Setpagesegmode (tesseract::P sm_single_block); Tess.

    SetImage ((uchar*) Gray.data, Gray.cols, Gray.rows, 1, gray.cols); Get the text char* out = Tess.
    Getutf8text (); Std: cout << out << Std::endl;
return 0; }

Ubuntu Compile command

g++-i/usr/local/include ' pkg-config--cflags--libs opencv tesseract ' Tesscv.cpp-o TESSCV

over!