utilities.h File Reference

#include "purify/config.h"
#include "purify/types.h"
#include <fstream>
#include <string>
#include <type_traits>

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Namespaces
	purify
	purify::utilities

Functions
t_int	purify::utilities::sub2ind (const t_int &row, const t_int &col, const t_int &rows, const t_int &cols)
	Converts from subscript to index for matrix. More...
std::tuple< t_int, t_int >	purify::utilities::ind2sub (const t_int &sub, const t_int &cols, const t_int &rows)
	Converts from index to subscript for matrix. More...
t_real	purify::utilities::mod (const t_real &x, const t_real &y)
	Mod function modified to wrap circularly for negative numbers. More...
template<class K >
K::Scalar	purify::utilities::mean (const K x)
	Calculate mean of vector. More...
template<class K >
t_real	purify::utilities::variance (const K x)
	Calculate variance of vector. More...
template<class K >
t_real	purify::utilities::standard_deviation (const K x)
	Calculates the standard deviation of a vector. More...
Image< t_complex >	purify::utilities::convolution_operator (const Image< t_complex > &a, const Image< t_complex > &b)
	Calculates the convolution between two images. More...
t_real	purify::utilities::calculate_l2_radius (const t_uint y_size, const t_real &sigma=0, const t_real &n_sigma=2., const std::string distirbution="chi")
	A function that calculates the l2 ball radius for sopt. More...
t_real	purify::utilities::SNR_to_standard_deviation (const Vector< t_complex > &y0, const t_real &SNR=30.)
	Converts SNR to RMS noise. More...
Vector< t_complex >	purify::utilities::add_noise (const Vector< t_complex > &y, const t_complex &mean, const t_real &standard_deviation)
	Add guassian noise to vector. More...
bool	purify::utilities::file_exists (const std::string &name)
	Test to see if file exists. More...
std::tuple< t_real, t_real, t_real >	purify::utilities::fit_fwhm (const Image< t_real > &psf, const t_int &size=3)
	Method to fit Gaussian to PSF. More...
t_real	purify::utilities::median (const Vector< t_real > &input)
	Return median of real vector. More...
t_real	purify::utilities::dynamic_range (const Image< t_complex > &model, const Image< t_complex > &residuals, const t_real &operator_norm=1)
	Calculate the dynamic range between the model and residuals. More...
Array< t_complex >	purify::utilities::init_weights (const Vector< t_real > &u, const Vector< t_real > &v, const Vector< t_complex > &weights, const t_real &oversample_factor, const std::string &weighting_type, const t_real &R, const t_int &ftsizeu, const t_int &ftsizev)
	Calculate weightings. More...
template<class T0 , class T1 >
std::enable_if< std::is_same< typename T0::Scalar, typename T1::Scalar >::value and T0::IsRowMajor, Vector< typename T0::Scalar > >::type	purify::utilities::sparse_multiply_matrix (const Eigen::SparseMatrixBase< T0 > &M, const Eigen::MatrixBase< T1 > &x)
	Parallel multiplication with a sparse matrix and vector. More...
std::tuple< t_int, t_real >	purify::utilities::checkpoint_log (const std::string &diagnostic)
	Reads a diagnostic file and updates parameters. More...
template<class K , class L >
Image< t_complex >	purify::utilities::parallel_multiply_image (const K &A, const L &B)
	Multiply images coefficient-wise using openmp. More...
Matrix< t_complex >	purify::utilities::re_sample_ft_grid (const Matrix< t_complex > &input, const t_real &re_sample_factor)
	zero pads ft grid for image up sampling and downsampling More...
Matrix< t_complex >	purify::utilities::re_sample_image (const Matrix< t_complex > &input, const t_real &re_sample_ratio)
	resamples image size More...