hdrl_DER_SNR.c File Reference

#include "hdrl_DER_SNR.h"
#include "hdrl_image.h"
#include "hdrl_utils.h"
#include <math.h>
#include <cpl.h>

Include dependency graph for hdrl_DER_SNR.c:

Functions
hdrl_error_t	estimate_noise_window (const hdrl_data_t *flux, const cpl_binary *msk, cpl_size start, cpl_size stop, const cpl_size sz)
	Estimate the noise in the pixels between [start, stop]. The noise calculation is done using the formula from: Stoehr, F. et al. DER SNR: A Simple & General Spectroscopic Signal-to-Noise Measurement Algorithm.
cpl_image *	estimate_noise_DER_SNR (const hdrl_data_t *flux_in, const cpl_binary *msk_in, const cpl_array *wavelengths, const cpl_size length, const cpl_size half_window)
	For every pixel in position i in img_arg, the function estimates the noise using the pixels in the window [i - half_window, i + half_window]. For details on the calculation inside the window, see estimate_noise_window()