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//=============================================================================
// MusE Reader
// Music Score Reader
//
// Copyright (C) 2010 Werner Schweer
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "ocr.h"
#include <tesseract/baseapi.h>
#include <locale.h>
namespace Ms {
//---------------------------------------------------------
// Ocr
//---------------------------------------------------------
Ocr::Ocr()
{
tess = 0;
}
//---------------------------------------------------------
// init
//---------------------------------------------------------
void Ocr::init()
{
if (tess == 0)
tess = new tesseract::TessBaseAPI;
tess->Init("/usr/local/share/tessdata", 0, 0, 0, false);
}
//---------------------------------------------------------
// readLine
//---------------------------------------------------------
QString Ocr::readLine(const OcrImage& img)
{
int w = img.r.width();
int h = img.r.height();
int bw = (w + 7) / 8;
uchar* d = new uchar[bw * h];
memset(d, 0, bw * h);
uchar* p = d;
int yo = img.r.y();
int xo = img.r.x();
for (int y = 0; y < h; ++y) {
for (int x = 0; x < bw; ++x) {
int mask = 0x80;
uchar dst = 0;
for (int xx = 0; xx < 8; ++xx) {
if (img.dot(x * 8 + xo + xx, y + yo))
dst |= mask;
mask >>= 1;
}
*p++ = ~dst;
}
}
char* txt = tess->TesseractRect(d, 0, bw, 0, 0, w, h);
return QString(txt);
}
}
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