transform_downsample.h

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/***************************************************************************
 *
 * Authors:     Carlos Oscar S. Sorzano (coss@cnb.csic.es)
 *
 * Unidad de  Bioinformatica of Centro Nacional de Biotecnologia , CSIC
 *
 * 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
 *
 *  All comments concerning this program package may be sent to the
 *  e-mail address 'xmipp@cnb.csic.es'
 ***************************************************************************/

#ifndef _DOWNSAMPLE
#define _DOWNSAMPLE

#include "core/xmipp_metadata_program.h"
#include "core/multidim_array.h"

class ImageGeneric;



class ProgTransformDownsample: public XmippMetadataProgram
{
public:
    double step;

    typedef enum {KER_RECTANGLE, FOURIER, SMOOTH} TDownsamplingMethod;

    TDownsamplingMethod method;

    int nThreads;

public:
    // Kernel
    MultidimArray<double> kernel;
public:
    void readParams();

    void defineParams();

    void preProcess()
    {
        create_empty_stackfile = false;
    }
    void processImage(const FileName &fnImg, const FileName &fnImgOut, const MDRow &rowIn, MDRow &rowOut);
};

void downsampleKernel(const ImageGeneric &M, double step, ImageGeneric &Mp);

void downsampleFourier(const ImageGeneric &M, double step, ImageGeneric &Mp, int nThreads);

void downsampleSmooth(const ImageGeneric &M, ImageGeneric &Mp);
#endif