ltiMergeHSIToImage.h

/*
 * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
 * Lehrstuhl fuer Technische Informatik, RWTH-Aachen, Germany
 *
 * This file is part of the LTI-Computer Vision Library (LTI-Lib)
 *
 * The LTI-Lib is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License (LGPL)
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * The LTI-Lib 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the LTI-Lib; see the file LICENSE.  If
 * not, write to the Free Software Foundation, Inc., 59 Temple Place -
 * Suite 330, Boston, MA 02111-1307, USA.
 */


/*----------------------------------------------------------------
 * project ....: LTI Digital Image/Signal Processing Library
 * file .......: ltiMergeHSIToImage.h
 * authors ....: Pablo Alvarado, Stefan Syberichs, Thomas Rusert
 * organization: LTI, RWTH Aachen
 * creation ...: 19.04.99
 * revisions ..: $Id: ltiMergeHSIToImage.h,v 1.3 2006/02/08 11:28:53 ltilib Exp $
 */

#ifndef _LTI_MERGE_HSI_TO_IMAGE_H_
#define _LTI_MERGE_HSI_TO_IMAGE_H_

#include "ltiMergeImage.h"

namespace lti {

  /**
   * Merge HSI (Hue Saturation Intensity) channels
   *
   * @ingroup gColor
   */
  class mergeHSIToImage : public mergeImage {
  public:

    /**
     * Constructor
     */
    mergeHSIToImage(void);

    /**
     * return the name of this type
     */
    virtual const char* getTypeName() const;

    /**
     * returns a pointer to a clone of the functor.
     */
    virtual functor* clone() const;

    /**
     * merge hue channel H, saturation S and intensity
     * channel I to an image
     * @param H the hue channel
     * @param S the saturation channel
     * @param I the intensity channel
     * @param img the image to be splitted
     */
    virtual bool apply(const matrix<float>& H,
                       const matrix<float>& S,
                       const matrix<float>& I,
                       image& img) const;


    /**
     * merge hue channel H, saturation S and intensity
     * channel I to an image
     * @param H the hue channel
     * @param S the saturation channel
     * @param I the intensity channel
     * @param img the image to be splitted
     */
    virtual bool apply(const channel8& H,
                       const channel8& S,
                       const channel8& I,
                       image& img) const;

    /**
     * merge the hue value H, saturation S and intensity value I
     * to a pixel
     * @param H the hue value
     * @param S the saturation value
     * @param I the intensity value
     * @param pixel the merged pixel
     */
    virtual bool apply(const float& H,
           const float& S,
           const float& I,
           rgbPixel& pixel) const;

    /**
     * merge the hue value H, saturation S and intensity value I
     * to a pixel
     * @param H the hue value
     * @param S the saturation value
     * @param I the intensity value
     * @param pixel the merged pixel
     */
    virtual bool apply(const ubyte& H,
           const ubyte& S,
           const ubyte& I,
           rgbPixel& pixel) const;

  private:
    /**
     * marix for HSI->RGB-conversion
     */
    static ubyte DeHSI[120][256];
  };

}

#endif