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| #include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "turbojpeg.h"
int main(int argc, char** argv)
{
const int COLOR_COMPONENTS = 3;
int width = 720;
int height = 560;
unsigned long size=width * height * COLOR_COMPONENTS;
double r=0.0000;
double g=0.0000;
double b=0.0000;
int jpegSubsamp;
int inColorspace;
unsigned char* compressedImage1=(unsigned char*)malloc(width * height * COLOR_COMPONENTS);
unsigned char* compressedImage2=(unsigned char*)malloc(width * height * COLOR_COMPONENTS);
unsigned char buffer1[width * height * COLOR_COMPONENTS];
unsigned char buffer2[width * height * COLOR_COMPONENTS];
FILE* fichier_jpeg1 = NULL;
FILE* fichier_jpeg2 = NULL;
fichier_jpeg1 = fopen("file1.jpeg", "rb");//ouverture du fichier
if(!fichier_jpeg1)
{
printf("erreur lecture JPG 1");
}
fread(compressedImage1, 1, 720*560, fichier_jpeg1);//lecture du fichier
fclose(fichier_jpeg1);// fermeture du fichier
fichier_jpeg2 = fopen("file2.jpeg", "rb");//ouverture du fichier
if(!fichier_jpeg1)
{
printf("erreur lecture JPG 2");
}
fread(compressedImage2, 1, 720*560, fichier_jpeg2);//lecture du fichier
fclose(fichier_jpeg2);// fermeture du fichier
const char *subsampName[TJ_NUMSAMP] = {
"4:4:4", "4:2:2", "4:2:0", "Grayscale", "4:4:0", "4:1:1"
};
const char *colorspaceName[TJ_NUMCS] = {
"RGB", "YCbCr", "GRAY", "CMYK", "YCCK"
};
tjhandle jpegDecompressor = tjInitDecompress();
if (tjDecompressHeader3(jpegDecompressor, compressedImage1, size, &width, &height, &jpegSubsamp,&inColorspace)<0)
printf("lecture JPEG header image1\n");
printf("Image1: %d x %d pixels, %s subsampling, %s colorspace\n",width, height,subsampName[jpegSubsamp], colorspaceName[inColorspace]);
if (tjDecompressHeader3(jpegDecompressor, compressedImage2, size, &width, &height, &jpegSubsamp,&inColorspace)<0)
printf("lecture JPEG header image2\n");
printf("Image2: %d x %d pixels, %s subsampling, %s colorspace\n",width, height,subsampName[jpegSubsamp], colorspaceName[inColorspace]);
if(tjDecompress2(jpegDecompressor, compressedImage1, size, buffer1, width, 0, height, TJPF_RGB, TJFLAG_FASTDCT)<0)
printf("decompressing JPEG image1\n");
if(tjDecompress2(jpegDecompressor, compressedImage2, size, buffer2, width, 0, height, TJPF_RGB, TJFLAG_FASTDCT)<0)
printf("decompressing JPEG image2\n");
tjDestroy(jpegDecompressor);
unsigned char *bufPtr1 = buffer1;
unsigned char *bufPtr2 = buffer2;
for(int i=0; i<560; i++)
{
for(int j=0; j<720; j++)
{
//printf("%d %d \n",*bufPtr1,*bufPtr2);
r += abs((*bufPtr1-*bufPtr2)/255.0000);
bufPtr1++;
bufPtr2++;
g += abs((*bufPtr1-*bufPtr2)/255.0000);
bufPtr1++;
bufPtr2++;
b += abs((*bufPtr1-*bufPtr2)/255.0000);
bufPtr1++;
bufPtr2++;
}
}
tjFree(compressedImage1);
tjFree(compressedImage2);
printf("r=%f g=%f b=%f\n",r,g,b);
return 0;
} |
