statistic.h

/**
 * @file    statistic.h
 * @brief   Function prototypes for statistic module
 *
 * Functions provide statistical tools
 *
 */

#ifndef _STATISTIC_H
#define _STATISTIC_H

void __attribute__((constructor)) libinit_statistic();

/** @brief Uniform distribution from 0 to 1
 */
double ran1();

/** @brief Normal distribution, mean=0, sigma=1
 */
double gauss();

/** @brief truncated (-1/+1) sigma = 1 mean = 0 gaussian probability
 */
double gauss_trc();

/** @brief Poisson distribution
 *
 * @param mu   Distribution mean
 */
long poisson(double mu);

/** @brief Gamma function
 */
double gammaln(double xx);

double better_poisson(double mu);

double fast_poisson(double mu);

/** @brief Apply Poisson noise to image
 */
long put_poisson_noise(const char *ID_in_name, const char *ID_out_name);

/** @brief Apply Gaussian noise to image
 */
long put_gauss_noise(const char *ID_in_name,
                     const char *ID_out_name,
                     double      ampl);

#endif