// initilize tesseract OCR engine

tesseract::TessBaseAPI *myOCR =

new tesseract::TessBaseAPI();

printf("Tesseract-ocr version: %s\n",

myOCR->Version());

// printf("Leptonica version: %s\n",

// getLeptonicaVersion());

if (myOCR->Init(NULL, "eng")) {

fprintf(stderr, "Could not initialize tesseract.\n");

exit(1);

}

tesseract::PageSegMode pagesegmode = static_cast<tesseract::PageSegMode>(7); // treat the image as a single text line

myOCR->SetPageSegMode(pagesegmode);

// read iamge

namedWindow("tesseract-opencv", 0);

Mat image = imread("sample.png", 0);

// set region of interest (ROI), i.e. regions that contain text

Rect text1ROI(80, 50, 800, 110);

Rect text2ROI(190, 200, 550, 50);

// recognize text

myOCR->TesseractRect( image.data, 1, image.step1(), text1ROI.x, text1ROI.y, text1ROI.width, text1ROI.height);

const char *text1 = myOCR->GetUTF8Text();

myOCR->TesseractRect( image.data, 1, image.step1(), text2ROI.x, text2ROI.y, text2ROI.width, text2ROI.height);

const char *text2 = myOCR->GetUTF8Text();

// remove "newline"

string t1(text1);

t1.erase(std::remove(t1.begin(), t1.end(), '\n'), t1.end());

string t2(text2);

t2.erase(std::remove(t2.begin(), t2.end(), '\n'), t2.end());

// print found text

printf("found text1: \n");

printf(t1.c_str());

printf("\n");

printf("found text2: \n");

printf(t2.c_str());

printf("\n");

// draw text on original image

Mat scratch = imread("sample.png");

int fontFace = FONT_HERSHEY_PLAIN;

double fontScale = 2;

int thickness = 2;

putText(scratch, t1, Point(text1ROI.x, text1ROI.y), fontFace, fontScale, Scalar(0, 255, 0), thickness, 8);

putText(scratch, t2, Point(text2ROI.x, text2ROI.y), fontFace, fontScale, Scalar(0, 255, 0), thickness, 8);

rectangle(scratch, text1ROI, Scalar(0, 0, 255), 2, 8, 0);

rectangle(scratch, text2ROI, Scalar(0, 0, 255), 2, 8, 0);

imshow("tesseract-opencv", scratch);

waitKey(0);

delete [] text1;

delete [] text2;

// destroy tesseract OCR engine

myOCR->Clear();

myOCR->End();

return 0;