how to view pdf file in asp.net using c# : Extract images from pdf files without using copy and paste Library software component .net winforms html mvc cips2ed60-part1061

F.11. CODE LISTINGS FOR CHAPTER 11
579
*
eight directions. Look for the two
*
shortest distances in the eight distances.
*
If the two shortest distances are
*
equal, then the point in question
*
is minimally distant to more than one
*
boundary point. Therefore, it is
*
on the medial axis so return a value.
*
Otherwise, return zero.
*
*******************************************/
mat_d(the_image, a, b, value, rows, cols)
int
a, b;
short **the_image, value;
long cols, rows;
{
int i, j, measuring;
short dist1 = 0,
dist2 = 0,
dist3 = 0,
dist4 = 0,
dist5 = 0,
dist6 = 0,
dist7 = 0,
dist8 = 0,
min1
= GRAY_LEVELS,
min2
= GRAY_LEVELS,
result = 0;
/* straight up */
measuring = 1;
i = a;
j = b;
while(measuring){
i--;
if(i >= 0){
if(the_image[i][j] == value)
dist1++;
else
measuring = 0;
}
else
measuring = 0;
} /* ends while measuring */
result = dist1;
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580
APPENDIX F. SOURCE CODE LISTINGS
min1
= dist1;
/* straight down */
measuring = 1;
i = a;
j = b;
while(measuring){
i++;
if(i <= rows-1){
if(the_image[i][j] == value)
dist2++;
else
measuring = 0;
}
else
measuring = 0;
} /* ends while measuring */
if(dist2 <= result)
result = dist2;
if(dist2 < min1){
min2 = min1;
min1 = dist2;
}
else
if(dist2 < min2)
min2 = dist2;
/* straight left */
measuring = 1;
i = a;
j = b;
while(measuring){
j--;
if(j >= 0){
if(the_image[i][j] == value)
dist3++;
else
measuring = 0;
}
else
measuring = 0;
} /* ends while measuring */
if(dist3 <= result)
result = dist3;
if(dist3 < min1){
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F.11. CODE LISTINGS FOR CHAPTER 11
581
min2 = min1;
min1 = dist3;
}
else
if(dist3 < min2)
min2 = dist3;
/* straight right */
measuring = 1;
i = a;
j = b;
while(measuring){
j++;
if(j <= cols-1){
if(the_image[i][j] == value)
dist4++;
else
measuring = 0;
}
else
measuring = 0;
} /* ends while measuring */
if(dist4 <= result)
result = dist4;
if(dist4 < min1){
min2 = min1;
min1 = dist4;
}
else
if(dist4 < min2)
min2 = dist4;
/* left and up */
measuring = 1;
i = a;
j = b;
while(measuring){
j--;
i--;
if(j >= 0 && i>=0){
if(the_image[i][j] == value)
dist5++;
else
measuring = 0;
}
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582
APPENDIX F. SOURCE CODE LISTINGS
else
measuring = 0;
} /* ends while measuring */
dist5 = ((dist5*14)+7)/10;
if(dist5 <= result)
result = dist5;
if(dist5 < min1){
min2 = min1;
min1 = dist5;
}
else
if(dist5 < min2)
min2 = dist5;
/* right and up */
measuring = 1;
i = a;
j = b;
while(measuring){
j++;
i--;
if(j <=cols-1 && i>=0){
if(the_image[i][j] == value)
dist6++;
else
measuring = 0;
}
else
measuring = 0;
} /* ends while measuring */
dist6 = ((dist6*14)+7)/10;
if(dist6 <= result)
result = dist6;
if(dist6 < min1){
min2 = min1;
min1 = dist6;
}
else
if(dist6 < min2)
min2 = dist6;
/* right and down */
measuring = 1;
i = a;
j = b;
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F.11. CODE LISTINGS FOR CHAPTER 11
583
while(measuring){
j++;
i++;
if(j <=cols-1 && i<=rows-1){
if(the_image[i][j] == value)
dist7++;
else
measuring = 0;
}
else
measuring = 0;
} /* ends while measuring */
dist7 = ((dist7*14)+7)/10;
if(dist7 <= result)
result = dist7;
if(dist7 < min1){
min2 = min1;
min1 = dist7;
}
else
if(dist7 < min2)
min2 = dist7;
/* left and down */
measuring = 1;
i = a;
j = b;
while(measuring){
j--;
i++;
if(j >=0 && i<=rows-1){
if(the_image[i][j] == value)
dist8++;
else
measuring = 0;
}
else
measuring = 0;
} /* ends while measuring */
dist8 = ((dist8*14)+7)/10;
if(dist8 <= result)
result = dist8;
if(dist8 < min1){
min2 = min1;
min1 = dist8;
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584
APPENDIX F. SOURCE CODE LISTINGS
}
else
if(dist8 < min2)
min2 = dist8;
if(min1 == min2)
result = value;
else
result = 0;
if(min1 == 0)
result = 0;
return(result);
} /* ends mat_d */
Listing 11.2 - Shape Manipulating Subroutines
/*********************************************
*
*
file mainsk.c
*
*
Functions: This file contains
*
main
*
show_mainsk_usage
*
*
Purpose:
*
This file contains the main calling
*
routine that calls the erosion,
*
dilation, outline, and skeleton
*
functions.
*
*
External Calls:
*
imageio.c - create_image_file
*
read_image_array
*
write_image_array
*
get_image_size
*
allocate_image_array
*
free_image_array
*
ed.c - erosion
*
dilation
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F.11. CODE LISTINGS FOR CHAPTER 11
585
*
mask_erosion
*
mask_dilation
*
interior_outline
*
exterior_outline
*
opening
*
closing
*
skeleton.c - thinning
*
skeleton
*
dilate_not_join
*
special_opening
*
special_closing
*
edm
*
mat
*
*
Modifications:
*
7 March 1993 - created
*
21 August 1998 - modified to work on entire
*
images at once.
*
19 September 1998 - modified to work with
*
all I O routines in imageio.c.
*
***********************************************/
#include "cips.h"
main(argc, argv)
int argc;
char *argv[];
{
char
name1[80], name2[80], type[80];
int
i, j, mask_type,
number, threshold;
long
length, width;
short
value;
short
**the_image;
short
**out_image;
/****************************************
*
*
Interpret the command line parameters.
586
APPENDIX F. SOURCE CODE LISTINGS
*
*****************************************/
if(argc < 5){
show_mainsk_usage();
exit(0);
}
strcpy(name1,
argv[1]);
strcpy(name2,
argv[2]);
strcpy(type,
argv[3]);
value
= atoi(argv[4]);
if(does_not_exist(name1)){
printf("\nERROR input file %s does not exist",
name1);
exit(0);
}
if(argc >= 5){
threshold = atoi(argv[5]);
mask_type = atoi(argv[5]);
}
if(argc >= 6)
number = atoi(argv[6]);
/****************************************
*
*
Allocate the arrays, create the output
*
file, read data.
*
*****************************************/
get_image_size(name1, &length, &width);
the_image = allocate_image_array(length, width);
out_image = allocate_image_array(length, width);
create_image_file(name1, name2);
read_image_array(name1, the_image);
for(i=0; i<length; i++)
for(j=0; j<width; j++)
F.11. CODE LISTINGS FOR CHAPTER 11
587
out_image[i][j] = 0;
/*********************************************
*
*
Call the desired function.
*
**********************************************/
/* thinning */
if(strncmp("thi", type, 3) == 0){
thinning(the_image, out_image,
value, threshold, 0,
length,
width);
} /* ends thinning operation */
/* dilate-not-join */
if(strncmp("dnj", type, 3) == 0){
dilate_not_join(the_image, out_image,
value, threshold,
length,
width);
} /* ends dilate_not_join operation */
/* erosion */
if(strncmp("ero", type, 3) == 0){
erosion(the_image, out_image,
value, threshold,
length,
width);
} /* ends erosion operation */
/* dilation */
if(strncmp("dil", type, 3) == 0){
dilation(the_image, out_image,
value, threshold,
length,
width);
} /* ends dilation operation */
/* mask_erosion */
if(strncmp("mer", type, 3) == 0){
mask_erosion(the_image, out_image,
value, mask_type,
588
APPENDIX F. SOURCE CODE LISTINGS
length,
width);
} /* ends mask_erosion operation */
/* mask_dilation */
if(strncmp("mdi", type, 3) == 0){
mask_dilation(the_image, out_image,
value, mask_type,
length,
width);
} /* ends mask_dilation operation */
/* interior_outline */
if(strncmp("int", type, 3) == 0){
interior_outline(the_image, out_image,
value, mask_type,
length,
width);
} /* ends interior_outline operation */
/* exterior_outline */
if(strncmp("ext", type, 3) == 0){
exterior_outline(the_image, out_image,
value, mask_type,
length,
width);
} /* ends exterior_outline operation */
/* opening */
if(strncmp("ope", type, 3) == 0){
opening(the_image, out_image,
value, mask_type, number,
length,
width);
} /* ends opening operation */
/* closing */
if(strncmp("clo", type, 3) == 0){
closing(the_image, out_image,
value, mask_type, number,
length,
width);
} /* ends closing operation */
/* special opening */
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