MFCEMemImageSkyModel.h

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//# MFCEMemImageSkyModel.h: Definition for MFCEMemImageSkyModel
//# Copyright (C) 1996,1997,1998,1999,2000,2002
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//# $Id$

#ifndef SYNTHESIS_MFCEMEMIMAGESKYMODEL_H
#define SYNTHESIS_MFCEMEMIMAGESKYMODEL_H

#include <synthesis/MeasurementComponents/CEMemImageSkyModel.h>
namespace casa { //# NAMESPACE CASA - BEGIN

//forward
class SkyEquation;

// <summary> 
// MF CE Mem Image Sky Model: Image Sky Model implementing the MF Mem algorithm
// </summary>

// <use visibility=export>

// <reviewed reviewer="" date="" tests="" demos="">

// <prerequisite>
//   <li> <linkto class=ImageSkyModel>ImageSkyModel</linkto> module
// </prerequisite>
//
// <etymology>
// MFCEMemImageSkyModel implements the MF Clean algorithm.
// It is derived from <linkto class=SkyModel>SkyModel</linkto>.
// </etymology>
//
// <synopsis> 
// Rewrite me for MEM!
// The MF Clean is an FFT-based clean algorithm. Cleaning is
// split into major and minor cycles. In a minor cycle, the
// brightest pixels are cleaned using only the strongest sidelobes
// (and main lobe) of the PSF. In the major cycle, a fully correct
// subtraction of the PSF is done for all points accumulated in the
// minor cycle using an FFT-based convolution for speed.
//
// The MF Clean is implemented using the <linkto class=ClarkCleanModel</linkto>
// class.
//
// Masking is optionally performed using a mask image: only points
// where the mask is non-zero are cleaned. If no mask is specified
// all points in the inner quarter of the image are cleaned.
// </synopsis> 
//
// <example>
// See the example for <linkto class=SkyModel>SkyModel</linkto>.
// </example>
//
// <motivation>
// </motivation>
//
// <todo asof="97/10/01">
// <ul> Allow specification of more control parameters
// </todo>

class MFCEMemImageSkyModel : public CEMemImageSkyModel {
public:

  // constructor
  MFCEMemImageSkyModel(casacore::Float sigma, 
                       casacore::Float targetFlux,
                       casacore::Bool constrainFlux,
                       const casacore::Vector<casacore::String>& priors,
                       const casacore::String& entropy);


  // Solve for this SkyModel
  virtual casacore::Bool solve (SkyEquation& me);

private:
  // Return the maximum absolute value per field
  casacore::Float maxField(casacore::Vector<casacore::Float>& imagemax, casacore::Vector<casacore::Float>& imagemin);
  // Return maximum abs outer sidelobe, more than nCenter pixels from the center
  casacore::Float maxOuter(casacore::Lattice<casacore::Float> & lat, const casacore::uInt nCenter );

};


} //# NAMESPACE CASA - END

#endif