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/** \file
* \brief Synthetic Image Render
*
* See Copyright Notice in im_lib.h
* $Id: im_render.cpp,v 1.1 2008/10/17 06:16:33 scuri Exp $
*/
#include <im.h>
#include <im_util.h>
#include <im_counter.h>
#include <im_math.h>
#include "im_process_pon.h"
#include <stdlib.h>
#include <memory.h>
#include <math.h>
#include <time.h>
static float iGetFactor(int data_type)
{
if (data_type == IM_BYTE)
return 255.0f;
else if (data_type == IM_INT || data_type == IM_USHORT)
return 65535.0f;
else
return 1.0f;
}
template <class T>
static int DoRenderCondOp(T *map, int width, int height, int d, imRenderCondFunc render_func, float* param, int counter)
{
int offset, cond = 1;
T Value;
for(int y = 0; y < height; y++)
{
offset = y * width;
for(int x = 0; x < width; x++)
{
Value = (T)(render_func(x, y, d, &cond, param));
if (cond) map[offset + x] = Value;
}
if (!imCounterInc(counter))
return 0;
}
return 1;
}
int imProcessRenderCondOp(imImage* image, imRenderCondFunc render_func, char* render_name, float* param)
{
int ret = 0;
int counter = imCounterBegin(render_name);
imCounterTotal(counter, image->depth*image->height, "Rendering...");
for (int d = 0; d < image->depth; d++)
{
switch(image->data_type)
{
case IM_BYTE:
ret = DoRenderCondOp((imbyte*)image->data[d], image->width, image->height, d, render_func, param, counter);
break;
case IM_USHORT:
ret = DoRenderCondOp((imushort*)image->data[d], image->width, image->height, d, render_func, param, counter);
break;
case IM_INT:
ret = DoRenderCondOp((int*)image->data[d], image->width, image->height, d, render_func, param, counter);
break;
case IM_FLOAT:
ret = DoRenderCondOp((float*)image->data[d], image->width, image->height, d, render_func, param, counter);
break;
}
if (!ret)
break;
}
imCounterEnd(counter);
return ret;
}
template <class T>
static int DoRenderOp(T *map, int width, int height, int d, imRenderFunc render_func, float* param, int counter, int plus)
{
int offset;
for(int y = 0; y < height; y++)
{
offset = y * width;
for(int x = 0; x < width; x++)
{
if (plus)
{
int size_of = sizeof(imbyte);
float value = map[offset + x] + render_func(x, y, d, param);
if (sizeof(T) == size_of)
map[offset + x] = (T)IM_BYTECROP(value);
else
map[offset + x] = (T)value;
}
else
map[offset + x] = (T)render_func(x, y, d, param);
}
if (!imCounterInc(counter))
return 0;
}
return 1;
}
int imProcessRenderOp(imImage* image, imRenderFunc render_func, char* render_name, float* param, int plus)
{
int ret = 0;
int counter = imCounterBegin(render_name);
imCounterTotal(counter, image->depth*image->height, "Rendering...");
for (int d = 0; d < image->depth; d++)
{
switch(image->data_type)
{
case IM_BYTE:
ret = DoRenderOp((imbyte*)image->data[d], image->width, image->height, d, render_func, param, counter, plus);
break;
case IM_USHORT:
ret = DoRenderOp((imushort*)image->data[d], image->width, image->height, d, render_func, param, counter, plus);
break;
case IM_INT:
ret = DoRenderOp((int*)image->data[d], image->width, image->height, d, render_func, param, counter, plus);
break;
case IM_FLOAT:
ret = DoRenderOp((float*)image->data[d], image->width, image->height, d, render_func, param, counter, plus);
break;
}
if (!ret)
break;
}
imCounterEnd(counter);
return ret;
}
static float do_add_specklenoise(int, int, int, int *cond, float* param)
{
float rnd = float(rand()) / RAND_MAX;
if (rnd < param[1])
{
*cond = 1;
return (rand() * param[0]) / RAND_MAX;
}
else
{
*cond = 0;
return 0;
}
}
int imProcessRenderAddSpeckleNoise(const imImage* src_image, imImage* dst_image, float percent)
{
float param[2];
param[0] = iGetFactor(src_image->data_type);
param[1] = percent / 100.0f;
srand((unsigned)time(NULL));
imImageCopyData(src_image, dst_image);
return imProcessRenderCondOp(dst_image, do_add_specklenoise, "Add Speckle Noise", param);
}
static float do_add_gaussiannoise(int, int, int, float* param)
{
float rnd, x1, x2;
do
{
x1 = float(rand()) / RAND_MAX; /* [0,1] */
x2 = float(rand()) / RAND_MAX; /* [0,1] */
x1 = 2*x1 - 1; /* [-1,1] */
x2 = 2*x2 - 1; /* [-1,1] */
rnd = x1*x1 + x2*x2;
} while( rnd >= 1 || rnd == 0);
rnd = (float)sqrt(-2 * log(rnd) / rnd) * x1;
return rnd * param[1] + param[0];
}
int imProcessRenderAddGaussianNoise(const imImage* src_image, imImage* dst_image, float mean, float stddev)
{
float param[2];
param[0] = mean;
param[1] = stddev;
srand((unsigned)time(NULL));
imImageCopyData(src_image, dst_image);
return imProcessRenderOp(dst_image, do_add_gaussiannoise, "Add Gaussian Noise", param, 1);
}
static float do_add_uniformnoise(int, int, int, float* param)
{
float rnd = float(rand()) / RAND_MAX;
rnd = 2*rnd - 1; /* [-1,1] */
return 1.7320508f * rnd * param[1] + param[0];
}
int imProcessRenderAddUniformNoise(const imImage* src_image, imImage* dst_image, float mean, float stddev)
{
float param[2];
param[0] = mean;
param[1] = stddev;
srand((unsigned)time(NULL));
imImageCopyData(src_image, dst_image);
return imProcessRenderOp(dst_image, do_add_uniformnoise, "Add Uniform Noise", param, 1);
}
static float do_const(int, int, int d, float* param)
{
return param[d];
}
int imProcessRenderConstant(imImage* image, float* value)
{
return imProcessRenderOp(image, do_const, "Constant", value, 0);
}
static float do_noise(int, int, int, float* param)
{
return (rand() * param[0]) / RAND_MAX;
}
int imProcessRenderRandomNoise(imImage* image)
{
static float param[1];
param[0] = iGetFactor(image->data_type);
srand((unsigned)time(NULL));
return imProcessRenderOp(image, do_noise, "Random Noise", param, 0);
}
static float do_cosine(int x, int y, int, float* param)
{
return float((cos(param[1]*(x-param[3])) * cos(param[2]*(y-param[4])) + param[5]) * param[0]);
}
int imProcessRenderCosine(imImage* image, float xperiod, float yperiod)
{
float param[6];
param[0] = iGetFactor(image->data_type);
if (xperiod == 0.0f) param[1] = 0.0;
else param[1] = 2.0f * 3.1416f / xperiod;
if (yperiod == 0.0f) param[2] = 0.0;
else param[2] = 2.0f * 3.1416f / yperiod;
param[3] = image->width/2.0f;
param[4] = image->height/2.0f;
if (image->data_type < IM_FLOAT)
param[0] = param[0] / 2.0f;
if (image->data_type == IM_BYTE)
param[5] = 1.0f;
else
param[5] = 0.0f;
return imProcessRenderOp(image, do_cosine, "Cosine", param, 0);
}
static float do_gaussian(int x, int y, int, float* param)
{
int xd = x - (int)param[2];
int yd = y - (int)param[3];
xd *= xd;
yd *= yd;
return float(exp((xd + yd)*param[1])*param[0]);
}
int imProcessRenderGaussian(imImage* image, float stddev)
{
float param[4];
param[0] = iGetFactor(image->data_type);
param[1] = -1.0f / (2.0f * stddev * stddev);
param[2] = image->width/2.0f;
param[3] = image->height/2.0f;
return imProcessRenderOp(image, do_gaussian, "Gaussian", param, 0);
}
static float do_lapgauss(int x, int y, int, float* param)
{
int xd = x - (int)param[2];
int yd = y - (int)param[3];
xd *= xd;
yd *= yd;
xd += yd;
return float((xd - param[4])*exp(xd*param[1])*param[0]);
}
int imProcessRenderLapOfGaussian(imImage* image, float stddev)
{
float param[5];
param[0] = iGetFactor(image->data_type);
param[1] = -1.0f / (2.0f * stddev * stddev);
param[2] = image->width/2.0f;
param[3] = image->height/2.0f;
param[4] = 2.0f * stddev * stddev;
param[0] /= param[4];
return imProcessRenderOp(image, do_lapgauss, "Laplacian of Gaussian", param, 0);
}
static inline float sinc(float x)
{
if (x == 0.0f)
return 1.0f;
else
return float(sin(x)/x);
}
static float do_sinc(int x, int y, int, float* param)
{
return float((sinc((x - param[3])*param[1])*sinc((y - param[4])*param[2]) + param[5])*param[0]);
}
int imProcessRenderSinc(imImage* image, float xperiod, float yperiod)
{
float param[6];
param[0] = iGetFactor(image->data_type);
if (xperiod == 0.0f) param[1] = 0.0;
else param[1] = 2.0f * 3.1416f / xperiod;
if (yperiod == 0.0f) param[2] = 0.0;
else param[2] = 2.0f * 3.1416f / yperiod;
param[3] = image->width/2.0f;
param[4] = image->height/2.0f;
if (image->data_type < IM_FLOAT)
param[0] = param[0] / 1.3f;
if (image->data_type == IM_BYTE)
param[5] = 0.3f;
else
param[5] = 0.0f;
return imProcessRenderOp(image, do_sinc, "Sinc", param, 0);
}
static float do_box(int x, int y, int, float* param)
{
int xr = x - (int)param[3];
int yr = y - (int)param[4];
if (xr < -(int)param[1] || xr > (int)param[1] ||
yr < -(int)param[2] || yr > (int)param[2])
return 0;
else
return param[0];
}
int imProcessRenderBox(imImage* image, int width, int height)
{
float param[5];
param[0] = iGetFactor(image->data_type);
param[1] = width/2.0f;
param[2] = height/2.0f;
param[3] = image->width/2.0f;
param[4] = image->height/2.0f;
return imProcessRenderOp(image, do_box, "Box", param, 0);
}
static float do_ramp(int x, int y, int, float* param)
{
if (param[3])
{
if (y < param[1])
return 0;
if (y > param[2])
return 0;
return (y-param[1])*param[0];
}
else
{
if (x < param[1])
return 0;
if (x > param[2])
return 0;
return (x-param[1])*param[0];
}
}
int imProcessRenderRamp(imImage* image, int start, int end, int dir)
{
float param[4];
param[0] = iGetFactor(image->data_type);
param[1] = (float)start;
param[2] = (float)end;
param[3] = (float)dir;
param[0] /= float(end-start);
return imProcessRenderOp(image, do_ramp, "Ramp", param, 0);
}
static inline int Tent(int t, int T)
{
if (t < 0)
return (t + T);
else
return (T - t);
}
static float do_tent(int x, int y, int, float* param)
{
int xr = x - (int)param[3];
int yr = y - (int)param[4];
if (xr < -(int)param[1] || xr > (int)param[1] ||
yr < -(int)param[2] || yr > (int)param[2])
return 0;
else
return Tent(xr, (int)param[1]) * Tent(yr, (int)param[2]) * param[0];
}
int imProcessRenderTent(imImage* image, int width, int height)
{
float param[5];
param[0] = iGetFactor(image->data_type);
param[1] = width/2.0f;
param[2] = height/2.0f;
param[0] /= param[1]*param[2];
param[3] = image->width/2.0f;
param[4] = image->height/2.0f;
return imProcessRenderOp(image, do_tent, "Tent", param, 0);
}
static float do_cone(int x, int y, int, float* param)
{
int xr = x - (int)param[2];
int yr = y - (int)param[3];
int radius = imRound(sqrt((double)(xr*xr + yr*yr)));
if (radius > (int)param[1])
return 0;
else
return ((int)param[1] - radius)*param[0];
}
int imProcessRenderCone(imImage* image, int radius)
{
float param[4];
param[0] = iGetFactor(image->data_type);
param[1] = (float)radius;
param[0] /= param[1];
param[2] = image->width/2.0f;
param[3] = image->height/2.0f;
return imProcessRenderOp(image, do_cone, "Cone", param, 0);
}
static float do_wheel(int x, int y, int, float* param)
{
int xr = x - (int)param[3];
int yr = y - (int)param[4];
int radius = imRound(sqrt((double)(xr*xr + yr*yr)));
if (radius < (int)param[1] || radius > (int)param[2])
return 0;
else
return param[0];
}
int imProcessRenderWheel(imImage* image, int int_radius, int ext_radius)
{
float param[5];
param[0] = iGetFactor(image->data_type);
param[1] = (float)int_radius;
param[2] = (float)ext_radius;
param[3] = image->width/2.0f;
param[4] = image->height/2.0f;
return imProcessRenderOp(image, do_wheel, "Wheel", param, 0);
}
static float do_grid(int x, int y, int, float* param)
{
int xr = x - (int)param[3];
int yr = y - (int)param[4];
if (xr % (int)param[1] == 0 && yr % (int)param[2] == 0)
return param[0];
else
return 0;
}
int imProcessRenderGrid(imImage* image, int x_space, int y_space)
{
float param[5];
param[0] = iGetFactor(image->data_type);
param[1] = (float)x_space;
param[2] = (float)y_space;
param[3] = image->width/2.0f;
param[4] = image->height/2.0f;
return imProcessRenderOp(image, do_grid, "Grid", param, 0);
}
static float do_chessboard(int x, int y, int, float* param)
{
int xr = x - (int)param[3];
int yr = y - (int)param[4];
int xp = xr % (int)param[1];
int yp = yr % (int)param[2];
int xc = (int)param[1]/2;
int yc = (int)param[2]/2;
if (xr < 0) xc = -xc;
if (yr < 0) yc = -yc;
if ((xp < xc && yp < yc) ||
(xp > xc && yp > yc))
return param[0];
else
return 0;
}
int imProcessRenderChessboard(imImage* image, int x_space, int y_space)
{
float param[5];
param[0] = iGetFactor(image->data_type);
param[1] = (float)x_space*2;
param[2] = (float)y_space*2;
param[3] = image->width/2.0f;
param[4] = image->height/2.0f;
return imProcessRenderOp(image, do_chessboard, "Chessboard", param, 0);
}
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