CannyOp.h

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/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2013 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLFilter/src/ICLFilter/CannyOp.h                      **
** Module : ICLFilter                                              **
** Authors: Christof Elbrechter, Andre Justus, Sergius Gaulik      **
**                                                                 **
**                                                                 **
** GNU LESSER GENERAL PUBLIC LICENSE                               **
** This file may be used under the terms of the GNU Lesser General **
** Public License version 3.0 as published by the                  **
**                                                                 **
** Free Software Foundation and appearing in the file LICENSE.LGPL **
** included in the packaging of this file.  Please review the      **
** following information to ensure the license requirements will   **
** be met: http://www.gnu.org/licenses/lgpl-3.0.txt                **
**                                                                 **
** The development of this software was supported by the           **
** Excellence Cluster EXC 277 Cognitive Interaction Technology.    **
** The Excellence Cluster EXC 277 is a grant of the Deutsche       **
** Forschungsgemeinschaft (DFG) in the context of the German       **
** Excellence Initiative.                                          **
**                                                                 **
********************************************************************/

#pragma once

#include <ICLUtils/CompatMacros.h>
#include <ICLUtils/Uncopyable.h>
#include <ICLCore/Img.h>
#include <ICLFilter/UnaryOp.h>

namespace icl {
  namespace filter{


    class ICLFilter_API CannyOp : public UnaryOp, public utils::Uncopyable{
      public:

      CannyOp(icl32f lowThresh=0, icl32f highThresh=255, int preBlurRadius=0);

      CannyOp(UnaryOp *dxOp, UnaryOp *dyOp, icl32f lowThresh=0, icl32f highThresh=255, bool deleteOps=true, int preBlurRadius=0);

      virtual ~CannyOp();


      void setThresholds(icl32f lowThresh, icl32f highThresh);


      icl32f getLowThreshold() const;


      icl32f getHighThreshold() const;


      virtual void apply(const core::ImgBase *src, core::ImgBase **dst);

      using UnaryOp::apply;


      void setPreBlurRadius(int preBlurRadius){
        m_preBlurRadius = preBlurRadius;
        ICL_DELETE(m_preBlurOp);
        setUpPreBlurOp();
      }

      bool getPreBlurRadius() const {
        return m_preBlurRadius;
      }

      private:

      void setUpPreBlurOp();

      void applyCanny32f(const core::ImgBase *dx, const core::ImgBase *dy, core::ImgBase *dst, int c);
      void applyCanny16s(const core::ImgBase *dx, const core::ImgBase *dy, core::ImgBase *dst, int c);

      std::vector<icl8u> m_cannyBuf;
      core::ImgBase *m_derivatives[2];
      UnaryOp *m_ops[2];
      UnaryOp *m_preBlurOp;
      icl32f m_lowT,m_highT;
      bool m_ownOps;
      core::Img32f m_buffer;
      int m_preBlurRadius;
    };
  } // namespace filter
} // namespace icl