gradient.h

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// This software is distributed as part of the Improla library. 
// Improla is a library of classes for image processing.
// 
// Copyright (c) 2004, B. R. Siva Chandra, India
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
// In case you would like to contact the author, use the following e-mail
// address: sivachandra_br@yahoo.com

// First Created    : 16th September 2004
// Author           : Siva Chandra
// Purpose          : Declares a class which performs a gradient operation on a 
//                    gray-scale image.

#ifndef __GRADIENT_H__
#define __GRADIENT_H__

#include <ip_function.h>
#include <size.h>
#include <image.h>
#include <tnt/tnt_array2d.h>

namespace iptk
{ // Start of namespace brace.

class Gradient : public iptk::IP_Function
{
public:
    Gradient(void);
    
    Gradient(const iptk::Image &im);
    
    Gradient(const Gradient &g);
    
    virtual ~Gradient();
    
    virtual void process(void);
    
    TNT::Array2D< int > getDirectionMap(void);
    
    virtual iptk::Image getResult(void);
    
protected:
    TNT::Array2D< int > dirMap;
    
private:
    iptk::Image result;
    
};    

} // End of namespace brace.

#endif // __GRADIENT_H__

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