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nhw_neatness_metrics.c
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/***************************************************************************
****************************************************************************
* NHW Neatness Metrics *
* file: nhw_neatness_metrics.c *
* version: 0.1.0 *
* last update: $ 10152018 nhw exp $ *
* *
****************************************************************************
****************************************************************************
****************************************************************************
* remark: -simple neatness metrics *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
void main(int argc, char **argv)
{
int i,j,scan,res,res2,n1,comp,NHW_IM_DIM=512,NHW_IM_SIZE=NHW_IM_DIM*NHW_IM_DIM,RGB_comps=3;
int NEATNESS_PERCEPTION,NEATNESS_THRESHOLD1,NEATNESS_THRESHOLD2,CONTOURS,neatness_amount,significance;
float neatness;
unsigned char bmp_header[54],*nhw_image,*nhw_comp,*ref_image,*ref_comp;
FILE *nhw_im_512,*ref_im_512;
nhw_image=(unsigned char*)malloc(NHW_IM_SIZE*RGB_comps*sizeof(char));
nhw_comp=(unsigned char*)malloc(NHW_IM_SIZE*sizeof(char));
ref_image=(unsigned char*)malloc(NHW_IM_SIZE*RGB_comps*sizeof(char));
ref_comp=(unsigned char*)malloc(NHW_IM_SIZE*sizeof(char));
if (argv[1]==NULL || argv[1]==0)
{
printf("\n Copyright (C) 2018 NHW Neatness Metrics\n");
printf("\n nhw_neatness_metrics.exe neatness_file.bmp reference_file.bmp");
printf("\n (with neatness_file and reference_file bitmap color 512x512 images)\n");
exit(-1);
}
if ((nhw_im_512 = fopen(argv[1],"rb")) == NULL )
{
printf ("\n Could not open neatness file \n");
exit(-1);
}
fread(bmp_header,54,1,nhw_im_512);
fread(nhw_image,NHW_IM_SIZE*RGB_comps,1,nhw_im_512);
fclose(nhw_im_512);
if ((ref_im_512 = fopen(argv[2],"rb")) == NULL )
{
printf ("\n Could not open reference file \n");
exit(-1);
}
fread(bmp_header,54,1,ref_im_512);
fread(ref_image,NHW_IM_SIZE*RGB_comps,1,ref_im_512);
fclose(ref_im_512);
// Start processing
NEATNESS_PERCEPTION=160;
NEATNESS_THRESHOLD1=30;
NEATNESS_THRESHOLD2=3;
CONTOURS=14;
for (comp=0,significance=0,n1=0,neatness_amount=0;comp<RGB_comps;comp++)
{
for (i=0,j=0;i<(NHW_IM_SIZE*RGB_comps);i+=RGB_comps,j++)
{
nhw_comp[j]=nhw_image[i+comp];
ref_comp[j]=ref_image[i+comp];
}
for (i=NHW_IM_DIM,res=0;i<(NHW_IM_SIZE-NHW_IM_DIM);i+=NHW_IM_DIM)
{
for (scan=i+1,j=1;j<(NHW_IM_DIM-1);j++,scan++)
{
res = (nhw_comp[scan]<<3) -
nhw_comp[scan-1]-nhw_comp[scan+1]-
nhw_comp[scan-NHW_IM_DIM]-nhw_comp[scan+NHW_IM_DIM]-
nhw_comp[scan-(NHW_IM_DIM+1)]-nhw_comp[scan+(NHW_IM_DIM-1)]-
nhw_comp[scan-(NHW_IM_DIM-1)]-nhw_comp[scan+(NHW_IM_DIM+1)];
// If neatness pixel
if (abs(res)>NEATNESS_PERCEPTION)
{
// Detect contours
if (abs(nhw_comp[scan]-nhw_comp[scan-1])<CONTOURS) n1++;
if (abs(nhw_comp[scan]-nhw_comp[scan+1])<CONTOURS) n1++;
if (abs(nhw_comp[scan]-nhw_comp[scan-NHW_IM_DIM])<CONTOURS) n1++;
if (abs(nhw_comp[scan]-nhw_comp[scan-(NHW_IM_DIM+1)])<CONTOURS) n1++;
if (abs(nhw_comp[scan]-nhw_comp[scan-(NHW_IM_DIM-1)])<CONTOURS) n1++;
if (abs(nhw_comp[scan]-nhw_comp[scan+NHW_IM_DIM])<CONTOURS) n1++;
if (abs(nhw_comp[scan]-nhw_comp[scan+(NHW_IM_DIM-1)])<CONTOURS) n1++;
if (abs(nhw_comp[scan]-nhw_comp[scan+(NHW_IM_DIM+1)])<CONTOURS) n1++;
// If contours
if (n1>3)
{
// Compare neatness with reference image contours
res2 = (ref_comp[scan]<<3) -
ref_comp[scan-1]-ref_comp[scan+1]-
ref_comp[scan-NHW_IM_DIM]-ref_comp[scan+NHW_IM_DIM]-
ref_comp[scan-(NHW_IM_DIM+1)]-ref_comp[scan+(NHW_IM_DIM-1)]-
ref_comp[scan-(NHW_IM_DIM-1)]-ref_comp[scan+(NHW_IM_DIM+1)];
if (abs(res2)>(NEATNESS_PERCEPTION>>1))
{
if (res>0)
{
if ((nhw_comp[scan]-ref_comp[scan])>=NEATNESS_THRESHOLD2 && (nhw_comp[scan]-ref_comp[scan])<=NEATNESS_THRESHOLD1)
{
neatness_amount += (nhw_comp[scan]-ref_comp[scan])*(nhw_comp[scan]-ref_comp[scan]);
significance++;
}
}
else
{
if ((ref_comp[scan]-nhw_comp[scan])>=NEATNESS_THRESHOLD2 && (ref_comp[scan]-nhw_comp[scan])<=NEATNESS_THRESHOLD1)
{
neatness_amount += (ref_comp[scan]-nhw_comp[scan])*(ref_comp[scan]-nhw_comp[scan]);
significance++;
}
}
}
}
n1=0;
}
}
}
}
neatness = (float)((float)(neatness_amount)/(float)(significance));
printf("\nSignificance = %d NHW Neatness metrics = %f\n",significance,neatness);
}