Gwyddion – Free SPM (AFM, SNOM/NSOM, STM, MFM, …) data analysis software

synth (HEAD)

synth — Synthetic data generation

Functions

void	gwy_data_field_synth_gaussian_displacement ()

Includes

#include <libprocess/gwyprocess.h>

Description

Functions

gwy_data_field_synth_gaussian_displacement ()

void
gwy_data_field_synth_gaussian_displacement
                               (GwyDataField *data_field,
                                gdouble sigma,
                                gdouble tau,
                                GRand *rng);

Fills a data field with correlated Gaussian noise, suitable as displacement field.

The number of calls to rng is unspecified; it will not be left in any defined state. However, the noise is filled from the data field centre. Meaning that changing tau will zoom in or out the Gaussian noise, preserving the centr (whereas changing sigma simply changes the amplitude).

Parameters

data_field	A data field.
sigma	Amplitude of displacement (in units of 1, usually meaning pixels).
tau	Lateral scale of displacement variation (in pixels).
rng	Random number generator.

Since: 2.59