problem getting character coordinates (using EANYCODE_CHAR and ETEXT_DESC)

[Andres]

Hello people,

I'm trying to get the characters coordinates but I'm getting them misplaced.

You can see the image and the rectangles with the coordinates here:
http://silvic.com.ar/rectangles.jpg

I'm using some adapted code from dlltest, and my code uses OpenCV. I'm
posting my code below.

Basically, I'm getting the character coordinates from EANYCODE_CHAR.

Any hint will be greatly appreciated.

Regards,

Andres



#include "ocr.h"

#define _UNICODE

#include <imgs.h>
#include <tessdll.h>

#include <cv.h>
#include <highgui.h>


#include <iostream>

using namespace std;


#pragma message("hay que tener definido __MSW32__")

void test()
{
    string file_path =
"A:\\prj\\Patentes\\imgs_temp\\in\\solo_patente_0474.bmp";
    string ret;

    IMAGE image;
    if (image.read_header(file_path.c_str()) < 0)
    {
        cerr<<"Can't open "<<file_path<<endl;
        return;
    }
    if (image.read(image.get_ysize ()) < 0)
    {
        cerr<<"Can't read "<<file_path<<endl;
        return;
    }

    string lang = "my_lang";

    TessDllAPI api(lang.c_str());

    api.BeginPageUpright(image.get_xsize(), image.get_ysize(),
image.get_buffer(),
                         image.get_bpp());

    ETEXT_DESC* output = api.Recognize_all_Words();

    IplImage *cv_image = cvLoadImage(file_path.c_str());

    cvNamedWindow("read", CV_WINDOW_AUTOSIZE);


    int j;
    for (int i = 0; i < output->count; i = j)
    {
        const EANYCODE_CHAR* ch = &output->text[i];
        unsigned char unistr[24];

        for (j = i; j < output->count; j++)
        {
            const EANYCODE_CHAR* unich = &output->text[j];

            if (ch->left != unich->left || ch->right != unich->right ||
                ch->top != unich->top || ch->bottom != unich->bottom)
                break;
            unistr[j - i] = static_cast<unsigned char>(unich->char_code);
        }
        unistr[j - i] = '\0';

        const char *txt = reinterpret_cast<const char*>(unistr);
        ret += txt;

        {

            cvRectangle(cv_image, cvPoint(ch->left, ch->top),
cvPoint(ch->right, ch->bottom), CV_RGB(255,0,0), 1);

            cvShowImage("read", cv_image);
            while(cvWaitKey(50)==-1);
        }
    }
    cout<<"read ["<<ret<<"]"<<endl;

}

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