MonochromeRectangleDetector.h Example File

 // -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-

 #ifndef __MONOCHROMERECTANGLEDETECTOR_H__
 #define __MONOCHROMERECTANGLEDETECTOR_H__

 /*
  *  MonochromeRectangleDetector.h
  *  y_wmk
  *
  *  Created by Luiz Silva on 09/02/2010.
  *  Copyright 2010 y_wmk authors All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <vector>
 #include <zxing/NotFoundException.h>
 #include <zxing/ResultPoint.h>
 #include <zxing/common/BitMatrix.h>
 #include <zxing/common/Counted.h>
 #include <zxing/ResultPoint.h>

 namespace zxing {

 struct TwoInts: public Counted {
   int start;
   int end;
 };

 class MonochromeRectangleDetector : public Counted {
  private:
   static const int MAX_MODULES = 32;
   Ref<BitMatrix> image_;

  public:
   MonochromeRectangleDetector(Ref<BitMatrix> image) : image_(image) {  };

   std::vector<Ref<ResultPoint> > detect();

  private:
   Ref<ResultPoint> findCornerFromCenter(int centerX, int deltaX, int left, int right,
                                         int centerY, int deltaY, int top, int bottom, int maxWhiteRun);

   Ref<TwoInts> blackWhiteRange(int fixedDimension, int maxWhiteRun, int minDim, int maxDim,
                                bool horizontal);

   int max(int a, float b) { return (float) a > b ? a : (int) b;};
 };

 }

 #endif // __MONOCHROMERECTANGLEDETECTOR_H__