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MakeGabor.h

Go to the documentation of this file.

#ifndef Impala_Core_Array_MakeGabor_h
#define Impala_Core_Array_MakeGabor_h

#include "Core/Array/Arrays.h"

namespace Impala
{
namespace Core
{
namespace Array
{

Array2dScalarReal64*
MakeGabor(int size, double sigma, double frequency, double orientation, bool symmetric)
{
    Array2dScalarReal64* filter = new Array2dScalarReal64(size, size, 0, 0);

    double cr = cos(orientation);
    double sr = sin(orientation);
    int begin = size/2;
    int end = size - begin;
    for(int y=-begin ; y<end ; y++)
    {
        double* p = filter->CPB(0, y+begin);
        for(int x=-begin ; x<end ; x++)
        {
            if(symmetric)
                *p = cos((x*cr + y*sr) / frequency) * exp(-(x*x + y*y) / (2*sigma*sigma));
            else
                *p = sin((x*cr + y*sr) / frequency) * exp(-(x*x + y*y) / (2*sigma*sigma));
            p++;
        }
    }

    return filter;
}


}//namespace Impala
}//namespace Core
}//namespace Array

#endif //Impala_Core_Array_MakeGabor_h

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