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#include <wand/MagickWand.h>
#include <gsl/gsl_histogram.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define round(x)((x)>=0?(int)((x)+0.5):(int)((x)-0.5))
#define ThrowWandException(wand) { char *description; ExceptionType severity; description=MagickGetException(wand,&severity); (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); description=(char *) MagickRelinquishMemory(description); exit(-1); }
int main(int argc, char **argv ) {
MagickWand *magick_wand;
MagickWand *output_wand;
MagickWand *first_wand;
double green, red, blue;
int i,j, k;
int image = 0;
int height = 0;
int width = 0;
int nImages = 0;
unsigned long number_wands;
char filename[256];
char *temp;
uint8_t ****array;
MagickWandGenesis();
// open the first image and get the height and width
first_wand = NewMagickWand();
if(MagickReadImage(first_wand, "Background.png") == MagickFalse) {
ThrowWandException(first_wand);
}
height = MagickGetImageHeight(first_wand);
width = MagickGetImageWidth(first_wand);
first_wand = DestroyMagickWand(first_wand);
printf("height: %d width:%d \n", height, width);
// count how many images there are in the input file
FILE *count = fopen( argv[1], "r");
if(count != NULL) {
while((fgets(filename, sizeof(filename), count)) != NULL) {
nImages++;
}
fclose(count);
}
printf("%d \n", nImages);
// initialize the storage array.
array = calloc(nImages, sizeof(array[0]));
for(i = 0; i < nImages; i++)
{
array[i] = calloc(height, sizeof(array[0][0]));
for(j = 0; j < height; j++)
{
array[i][j] = calloc(width, sizeof(array[0][0][0]));
for(k = 0; k < width; k++)
{
array[i][j][k] = calloc(3, sizeof(array[0][0][0][0]));
}
}
}
// store each pixel in the storage array. array[nImage][height][width][ { R, G, B} ]
FILE *input_file = fopen ( argv[1], "r" );
if ( input_file != NULL ) {
while ((fgets(filename, sizeof(filename), input_file)) != NULL ) {
temp = strchr(filename, '\n');
if (temp != NULL) *temp = '\0';
magick_wand = NewMagickWand();
MagickReadImage(magick_wand, filename);
PixelIterator* iterator = NewPixelIterator(magick_wand);
PixelWand **pixels = PixelGetNextIteratorRow(iterator,&number_wands);
printf("Image number:%d Filename: %s \n", image, filename);
for (i=0; pixels != (PixelWand **) NULL; i++) {
for (j=0; j<number_wands; j++) {
green = PixelGetGreen(*pixels);
blue = PixelGetBlue(*pixels);
red = PixelGetRed(*pixels);
// printf("write: %d %d %d \n", round(red*255), round(green*255), round(blue*255));
array[image][i][j][0] = round(red*255);
array[image][i][j][1] = round(green*255);
array[image][i][j][2] = round(blue*255);
}
PixelSyncIterator(iterator);
pixels=PixelGetNextIteratorRow(iterator,&number_wands);
}
PixelSyncIterator(iterator);
iterator=DestroyPixelIterator(iterator);
ClearMagickWand(magick_wand);
image++;
}
fclose ( input_file );
}
else {
exit(0);
}
// initialize the output array
int output[height][width][3];
// calculate histograms
for (j = 0; j < height; j++) {
for (k = 0; k < width; k++) {
gsl_histogram * r = gsl_histogram_alloc (nImages);
gsl_histogram * g = gsl_histogram_alloc (nImages);
gsl_histogram * b = gsl_histogram_alloc (nImages);
gsl_histogram_set_ranges_uniform (r, 0, 255);
gsl_histogram_set_ranges_uniform (g, 0, 255);
gsl_histogram_set_ranges_uniform (b, 0, 255);
for (i = 0; i < nImages; i++) {
gsl_histogram_increment (r, array[i][j][k][0]);
gsl_histogram_increment (g, array[i][j][k][1]);
gsl_histogram_increment (b, array[i][j][k][2]);
//printf("height %d width %d image %d %hhu %hhu %hhu \n", j, k, i, array[i][j][k][0], array[i][j][k][1], array[i][j][k][2]);
}
size_t red = gsl_histogram_max_bin(r);
size_t green = gsl_histogram_max_bin(g);
size_t blue = gsl_histogram_max_bin(b);
int red_index = gsl_histogram_get(r, red);
int green_index = gsl_histogram_get(g, green);
int blue_index = gsl_histogram_get(b, blue);
output[j][k][0] = array[red_index - 1 ][j][k][0];
output[j][k][1] = array[blue_index - 1 ][j][k][1];
output[j][k][2] = array[green_index - 1 ][j][k][1];
printf("i (%d,%d) rgb(%d,%d,%d) \n ", j, k, output[j][k][0], output[j][k][1], output[j][k][2]);
gsl_histogram_free (r);
gsl_histogram_free (g);
gsl_histogram_free (b);
}
}
MagickWand *m_wand = NULL;
PixelWand *p_wand = NULL;
PixelIterator *iterator = NULL;
PixelWand **pixels = NULL;
int x,y;
char rgb[128];
MagickWandGenesis();
p_wand = NewPixelWand();
PixelSetColor(p_wand,"white");
m_wand = NewMagickWand();
// Create a 100x100 image with a default of white
MagickNewImage(m_wand,height,width,p_wand);
// Get a new pixel iterator
iterator=NewPixelIterator(m_wand);
for(y=0;y<100;y++) {
// Get the next row of the image as an array of PixelWands
pixels=PixelGetNextIteratorRow(iterator,&x);
// Set the row of wands to a simple gray scale gradient
for(x=0;x<100;x++) {
sprintf(rgb, "rgb(%d,%d,%d)", array[0][i][j][0], array[0][i][j][1], array[0][i][j][2]);
PixelSetColor(pixels[x],rgb);
}
// Sync writes the pixels back to the m_wand
PixelSyncIterator(iterator);
}
// Clean up
iterator=DestroyPixelIterator(iterator);
MagickWriteImage(m_wand,"output.png");
DestroyMagickWand(m_wand);
MagickWandTerminus();
// write the histogram data to an image
// output_wand = NewMagickWand();
// PixelWand *p = NewPixelWand();
// PixelSetColor(p, "white");
// if(MagickNewImage(output_wand, height, width, p) == MagickFalse) {
// ThrowWandException(output_wand);
// }
// PixelIterator* iterator = NewPixelIterator(output_wand);
// PixelWand **pixels = PixelGetNextIteratorRow(iterator,&number_wands);
// printf("Image number:%d Filename: %s \n", image, filename);
// for (i=0; i<=height; i++) {
// for (j=0; j<width; j++) {
// char rgb[24];
// //sprintf(rgb, "rgb(0,20,0)");
// printf("o (%d,%d) %s \n", i, j, rgb);
// if( (PixelSetColor(pixels[j], rgb)) == MagickFalse ) {
// ThrowWandException(output_wand);
// }
// }
// PixelSyncIterator(iterator);
// pixels=PixelGetNextIteratorRow(iterator,&number_wands);
// }
MagickWandTerminus();
return 0;
}
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