clipm_image_sim.c File Reference

#include "clipm_image_sim.h"
#include "clipm_math.h"
#include "clipm_math_rng.h"
#include "clipm_priv_checks.h"
#include "clipm_priv_error.h"
#include "clipm_priv_image.h"
#include <math.h>

Macros
#define	clipm_image_sim_noise_gaussian_BODY( TYPE)

Functions
cpl_error_code	clipm_image_sim_noise_gaussian (cpl_image *img_modified, const cpl_size window_xxyy[4], double sigma)
	Add white gaussian noise to an image. More...
cpl_error_code	clipm_image_sim_circle (cpl_image *img_modified, double centre_x, double centre_y, double radius, double brightness)
	Add a circle to an existing image (additively, on top). More...
cpl_error_code	clipm_image_sim_rectangle (cpl_image *img_modified, double centre_x, double centre_y, double angle, double length, double width, double brightness)
	Add a circle to an existing image (additively, on top). More...

Macro Definition Documentation

clipm_image_sim_noise_gaussian_BODY

#define clipm_image_sim_noise_gaussian_BODY

(

TYPE

)

Value:

do { \
    cpl_size x, \
             y; \
    TYPE    *tdata; \
    \
    tdata = (TYPE*)data; \
    \
    for (y = 0; y < wdwsize[1]; y++) \
    { \
        for (x = 0; x < wdwsize[0]; x++) \
        { \
            if (badp == NULL || badp[x] == CPL_BINARY_0) \
            { \
                double  g; \
                g = sigma * clipm_math_rng_gaussian(); \
                if (noise_abs_limit >= 0.0 && fabs(g) > noise_abs_limit) \
                    g = (g < 0.0 ? -1 : +1) * noise_abs_limit; \
                if (type == CPL_TYPE_INT) \
                    tdata[x] += clipm_math_round_d2i(g); \
                else \
                    tdata[x] += g; \
            } \
        } \
        tdata += size[0]; \
        if (badp != NULL) \
            badp += size[0]; \
    } \
} while (0)