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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 round(x)((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 findmax (uint8_t *p, int n)
{
int mx = 0, v = p[0];
for (int i = 1; i < n; i++) {
if (p[i] > v) {
v = p[i];
mx = i;
}
}
return mx;
}
int main(int argc, char **argv ) {
MagickWand *magick_wand, *first_wand, *output_wand;
PixelIterator *input_iterator, *output_iterator;
PixelWand **pixels, *p_out;
double green, red, blue;
int i,j, k, x, y;
int image = 0;
int nImages = 0;
unsigned long height, width;
char filename[256];
char rgb[128];
char *temp;
FILE *input_file;
uint8_t ****array;
uint8_t ***output;
// open the first image and get the height and width
first_wand = NewMagickWand();
if(MagickReadImage(first_wand, argv[2]) == MagickFalse) {
ThrowWandException(first_wand);
}
height = MagickGetImageHeight(first_wand);
width = MagickGetImageWidth(first_wand);
first_wand = DestroyMagickWand(first_wand);
printf("height: %ld width:%ld \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("number of images: %d \n", nImages);
// initialize the storage arrays
output = calloc(height, sizeof(output[0]));
for(i = 0; i < height; i++) {
output[i] = calloc(width, sizeof(output[0][0]));
for(j = 0; j < width; j++) {
output[i][j] = calloc(3, sizeof(output[0][0][0]));
}
}
array = calloc(nImages, sizeof(array[0]));
for(i = 0; i < nImages; i++) {
array[i] = calloc(height, sizeof(array[0][0]));
for(j = 0; j < (long) 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]));
}
}
}
MagickWandGenesis();
// store each pixel in the storage array. array[nImage][height][width][ { R, G, B} ]
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);
input_iterator = NewPixelIterator(magick_wand);
printf("Image number:%d Filename: %s \n", image, filename);
for (i=0; i<height; i++) {
pixels = PixelGetNextIteratorRow(input_iterator, &width);
for (j=0; j<width ; j++) {
green = PixelGetGreen(pixels[j]);
blue = PixelGetBlue(pixels[j]);
red = PixelGetRed(pixels[j]);
array[image][i][j][0] = round(red*255);
array[image][i][j][1] = round(green*255);
array[image][i][j][2] = round(blue*255);
// printf("array: (%d, %d,%d,%d,%d,%d) \n", image, i, j, array[image][i][j][0], array[image][i][j][1], array[image][i][j][2]);
}
PixelSyncIterator(input_iterator);
}
PixelSyncIterator(input_iterator);
input_iterator=DestroyPixelIterator(input_iterator);
ClearMagickWand(magick_wand);
image++;
}
fclose ( input_file );
}
else {
printf("could not open file \n");
exit(1);
}
// calculate histograms
for (j = 0; j < height; j++) {
for (k = 0; k < width; k++) {
uint8_t histr[256] = { 0 }, histg[256] = { 0 }, histb[256] = { 0 };
for (i = 0; i < nImages; i++) {
histr[array[i][j][k][0]] += 1;
histg[array[i][j][k][1]] += 1;
histb[array[i][j][k][2]] += 1;
}
output[j][k][0] = findmax(histr, 256);
output[j][k][1] = findmax(histg, 256);
output[j][k][2] = findmax(histb, 256);
printf("out (%d,%d,%d,%d,%d) \n ", j, k, output[j][k][0], output[j][k][1], output[j][k][2]);
}
}
pixels = NewPixelWand();
p_out = NewPixelWand();
PixelSetColor(p_out,"white");
output_wand = NewMagickWand();
MagickNewImage(output_wand,width,height,p_out);
output_iterator=NewPixelIterator(output_wand);
for(x=0;x<height;x++) {
pixels=PixelGetNextIteratorRow(output_iterator,&y);
for(y=0;y<width;y++) {
sprintf(rgb, "rgb(%d,%d,%d)", output[x][y][0], output[x][y][1], output[x][y][2]);
printf("write (%d,%d), %s \n", x ,y, rgb);
PixelSetColor(pixels[y],rgb);
}
PixelSyncIterator(output_iterator);
}
output_iterator=DestroyPixelIterator(output_iterator);
MagickWriteImage(output_wand,"output.png");
DestroyMagickWand(output_wand);
MagickWandTerminus();
return 0;
}
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