tesseract does not work. Some errors displayed

[adrian company]

Hi all,
I am using tesseract engine to detect text from an image. I process the image to binarize it and then extract text from it, but some errors are displayed when I execute the program.
Does anyone know what I am doing wrong? I paste the code and errors displayed in the execution.

if (waitKey(10) >= 0){

                // leer imagen
                Mat imagen = imread("/home/adrian/workspace/OCR/matricula2.jpg"/*,CV_LOAD_IMAGE_GRAYSCALE*/);
                imshow("imagen",imagen);
             

                //procesamos imagen redimensionada: (filtramos, pasamos a escala grises, binarizamos)
                 medianBlur(imagen,imagen, 3);
                 cvtColor(imagen,imagen,CV_BGR2GRAY);
                 threshold(imagen,imagen,umbral, umbral_max,3);

                // inicializamos motor OCR tesseract
                   putenv("TESSDATA_PREFIX=/usr/local/share/");
                   setlocale(LC_NUMERIC, "C");
                   tesseract::TessBaseAPI api;
                   printf("\nTesseract-ocr version: %s--------\t",api.Version()); //version de tesseract
                   printf("Leptonica version: %s\n", getLeptonicaVersion());        //version de leptonica
                   printf("___________________________________________________________________________\n");

                   if (api.Init(NULL, "spa")) {                 //idioma spanish
                      fprintf( stderr, " ¡No se pudo inicializar tesseract! \n" );
                       exit(1);
                   }
                 
                    api.SetPageSegMode(tesseract::PSM_AUTO);
                    api.SetVariable("tessedit_char_whitelist", "ABCDEFGHIJKLMNOPQRSTUVWXYZ.0123456789");
                                   
                    api.SetImage(imagen.data, imagen.size().width,imagen.size().height, imagen.channels(), imagen.step1());

           // region de interes (ROI), p.ej. regiones que contengan texto
            Rect textROI(0,0,imagen.cols,imagen.rows);//imagen completa


            // recognize text
            api.TesseractRect( imagen.data, 0,imagen.step1(), textROI.x, textROI.y,textROI.width, textROI.height);

            char *texto = new char[200];
            texto = api.GetUTF8Text();
            // remove "newline"
            string t1(texto);
            t1.erase( remove(t1.begin(), t1.end(), '\n'), t1.end() );

            // print found text
            printf("TEXTO LEIDO: \n");
            printf( "%s",t1.c_str() );

       

            // draw rectangle image
           
            rectangle(imagen, textROI, Scalar(0, 0, 255), 2, 8, 0);
           
            imwrite("/home/adrian/workspace/OCR/procesadas/binaria.jpg",imagen);
           
            imshow("binarizada",imagen);

            delete [] texto;
            // destroy tesseract OCR engine
            api.Clear();
            api.End();
            }

and the errors displayed are:

Tesseract-ocr version: 3.02.02--------    Leptonica version: leptonica-1.69
___________________________________________________________________________
Error in pixReduceRankBinary2: hs must be at least 2
Error in pixDilateBrick: pixs not defined
Error in pixExpandReplicate: pixs not defined
Error in pixAnd: pixs1 not defined
Error in pixDilateBrick: pixs not defined
Error in pixExpandReplicate: pixs not defined
Error in pixAnd: pixs2 not defined
TEXTO LEIDO:

[adrian company]

When no errors are displayed, I read no text from the image. The output is empty.
Please any clue about that??

[adrian company]

Hi I' ve been trying to fix the code and now I read some text but the text readed is not correct. When I' m trying to read the image, "texto.jpg" the output text is something like that:
II" n llfi  ' IIIi"'"“MM“ufimn"w»“W,;H»m““wu%M%“m»%.IlI!!!!!| "" "" ''"umm """"'"""“ "" "" '''''|IImmw '!!!ll::...i!!"!""' W*WM‘WM

Anybody  knows what is the reason of that?
This is the image to read:

El viernes, 4 de octubre de 2013 08:59:34 UTC+2, adrian company escribió:

[Dr Georgle]

did you ever get any help with this?  your image is not of good quality, but i could extract a lot of the text without much effort.