utility.h

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/****************************************************************************************
 * SCYLLARUS : C++ HYPERSPECTRAL PROCESSING LIBRARY
 * utility.h - Helper functions and utility functions.
 *
 * This computer code is subject to copyright:
 * (c) National ICT Australia Limited (NICTA) 2013-2014 All Rights Reserved.
 *
 * Jeremy Oorloff, National ICT Australia (NICTA)
 *
 ***************************************************************************************/

#ifndef UTILITY_H_
#define UTILITY_H_

#include <armadillo>
#include <opencv2/opencv.hpp>
#include <iso646.h>

#include "utility_imp.h"
#include "ocv_tools.h"
#include "logger.h"
#include "nurbs.h"


namespace scyl
{

    template <class T> void nan_to_zero(T & in);

    template <class T> void zero_to_one(T & in);

    template <class T> bool arma_cmp(const T & a,
                                     const T & b,
                                     const bool verbose,
                                     float eps);

    template <class T> int arma_cmp_num(const T & a,
                                        const T & b,
                                        float   eps);

    template <class T> float arma_cmp_sig_figs(const T & a,
                                               const T & b,
                                               int num_sig_figs);

    arma::fvec non_negative_least_squares_2(arma::fmat   a,
                                            arma::fvec   b);

    void remove_bands(arma::fcube & in,
                       arma::fvec & waves,
                       arma::uvec   remove);

    void scale_cube(arma::fcube & in,
                            int   height,
                            int   width,
                            int   cv_interpolate_flag=cv::INTER_LINEAR);

    float angle(const arma::fvec & a,
                const arma::fvec & b);

    void image_gradient(const arma::fmat & in,
                              arma::fmat & gx,
                              arma::fmat & gy);

    arma::fmat arma_slice_mean(const arma::fcube & in);

    void register_image_bands(const arma::fcube & in,
                                     arma::fvec & coloff,
                                     arma::fvec & rowoff,
                                            int   debug=0);

    void align_image_bands(arma::fcube & in,
                            arma::fvec & coloff,
                            arma::fvec & rowoff,
                                   int   debug=0);
    void sort_bands(arma::fcube & I,
                     arma::fvec & wavelengths);

    arma::fmat resample_endmembers(const arma::fmat & in_endmembers,
                                   const arma::fvec & in_waves,
                                   const arma::fvec & in_waves_new);


}
#endif /* UTILITY_H_ */