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F.10. CODE LISTINGS FOR CHAPTER 10
529
/*******************************************
*
*
edge_gray_shade_region(..
*
*
This function segments an image by
*
growing gray shade regions inside of
*
edges. It combines the techniques
*
of the edge_region and gray_shade_region
*
functions.
*
*
The steps are:
*
. detect edges
*
. threshold edge output to a
*
percent value
*
. lay the edges on top of the original
*
image to eliminate them from
*
consideration
*
. grow regions
*
*******************************************/
edge_gray_shade_region(in_name, the_image,
out_image, edge_type,
min_area, max_area, diff, percent,
set_value, erode,
rows, cols, bits_per_pixel)
char
in_name[];
float
percent;
int
edge_type;
long
bits_per_pixel, cols, rows;
short
diff, erode,
max_area, min_area,
set_value,
**the_image,
**out_image;
{
int
a, b, count, i, j, k,
length, width;
short cutoff;
unsigned long histogram[GRAY_LEVELS+1];
/***************************
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530
APPENDIX F. SOURCE CODE LISTINGS
*
*
Detect the edges. Do
*
not threshold.
*
****************************/
if(edge_type == 1 ||
edge_type == 2 ||
edge_type == 3)
detect_edges(the_image, out_image,
edge_type, 0, 0,
rows, cols,
bits_per_pixel);
if(edge_type == 4){
quick_edge(the_image, out_image,
0, 0,
rows, cols,
bits_per_pixel);
} /* ends if 4 */
if(edge_type == 5){
homogeneity(the_image, out_image,
rows, cols,
bits_per_pixel,
0, 0);
} /* ends if 5 */
if(edge_type == 6){
difference_edge(the_image, out_image,
rows, cols,
bits_per_pixel,
0, 0);
} /* ends if 6 */
if(edge_type == 7){
contrast_edge(the_image, out_image,
rows, cols,
bits_per_pixel,
0, 0);
} /* ends if 7 */
if(edge_type == 8){
gaussian_edge(the_image, out_image,
rows, cols,
bits_per_pixel,
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F.10. CODE LISTINGS FOR CHAPTER 10
531
3, 0, 0);
} /* ends if 8 */
if(edge_type == 10){
range(the_image, out_image,
rows, cols,
bits_per_pixel,
3, 0, 0);
} /* ends if 10 */
if(edge_type == 11){
variance(the_image, out_image,
rows, cols,
bits_per_pixel,
0, 0);
} /* ends if 11 */
/**write_array_into_tiff_image("f:e1.tif", out_image,
il, ie, ll, le);**/
/* copy out_image to the_image */
for(i=0; i<rows; i++)
for(j=0; j<cols; j++)
the_image[i][j] = out_image[i][j];
/******************************
*
*
Threshold the edge detector
*
output at a given percent.
*
This eliminates the weak
*
edges.
*
*******************************/
zero_histogram(histogram, GRAY_LEVELS+1);
calculate_histogram(the_image, histogram,
rows, cols);
find_cutoff_point(histogram, percent, &cutoff,
rows, cols);
threshold_image_array(the_image, out_image,
GRAY_LEVELS, cutoff,
set_value, rows, cols);
if(erode != 0){
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532
APPENDIX F. SOURCE CODE LISTINGS
/* copy out_image to the_image */
for(i=0; i<rows; i++)
for(j=0; j<cols; j++)
the_image[i][j] = out_image[i][j];
erode_image_array(the_image, out_image,
set_value, erode,
rows, cols);
} /* ends if erode */
/*******************************
*
*
Read the original gray shade
*
image back into the_image.
*
*******************************/
read_image_array(in_name, the_image);
/*******************************
*
*
Overlay the edge values
*
on top of the original
*
image by setting them to
*
FORGET_IT so the region
*
growing will not use those
*
points.
*
*******************************/
for(i=0; i<rows; i++)
for(j=0; j<cols; j++)
if(out_image[i][j] == set_value)
the_image[i][j] = FORGET_IT;
/**write_array_into_tiff_image("f:e4.tif", the_image,
il, ie, ll, le);**/
pixel_grow(the_image, out_image, diff,
min_area, max_area,
rows, cols);
} /* ends edge_gray_shade_region */
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F.10. CODE LISTINGS FOR CHAPTER 10
533
show_stackp()
{
char r[80];
struct stacksp *temp;
temp = stackp;
while(temp != NULL){
printf("\n\t\t\t\t%d %d %x %x",temp->x,temp->y, temp, temp->next);
temp = temp->next;
}
}
int is_not_emptyp(pointer)
struct stacksp *pointer;
{
int result = 0;
if(pointer != NULL)
result = 1;
return(result);
} /* ends is_empty */
pushp(x, y)
short x, y;
{
struct stacksp *new_one;
new_one = (struct stacksp *)
calloc(1, sizeof(struct stacksp ));
new_one->next = stackp;
new_one->x
= x;
new_one->y
= y;
stackp
= new_one;
} /* ends push */
popp(x, y)
short *x, *y;
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534
APPENDIX F. SOURCE CODE LISTINGS
{
struct stacksp *temp;
temp
= stackp;
*x
= stackp->x;
*y
= stackp->y;
stackp
= stackp->next;
free(temp);
} /* ends pop */
Listing 10.2 - The Segmentation Subroutines of this Chapter
/***********************************************
*
*
file main2seg.c
*
*
Functions: This file contains
*
main
*
*
Purpose:
*
This is a calling program that calls
*
the three new segmentation techniques
*
discussed in Image Processing part 10.
*
*
External Calls:
*
imageio.c - does_not_exist
*
get_image_size
*
get_bitsperpixel
*
allocate_image_array
*
free_image_array
*
create_file_if_needed
*
read_image_array
*
write_image_array
*
segment2.c - edge_region
*
gray_shade_region
*
edge_gray_shade_region
*
F.10. CODE LISTINGS FOR CHAPTER 10
535
*
Modifications:
*
5 December 1992 - created
*
15 August 1998 - modified to work on entire
*
images at once.
*
***********************************************/
#include "cips.h"
short **the_image;
short **out_image;
main(argc, argv)
int argc;
char *argv[];
{
char
name1[80], name2[80], low_high[80], type[80];
float
percent;
int
i, j,
looking = 1;
long
length, width, bits_per_pixel;
short
value, value2, value3,
value4, value5, value6;
struct
tiff_header_struct image_header;
/***********************************************
*
*
Interpret the command line parameters.
*
************************************************/
if(argc < 4){
printf(
"\n\nNot enough parameters:"
"\n"
"\n usage: main2seg in-file out-file type"
" [values ...]"
"\n"
"\n
recall type: Edge-region edge-gray-grow (C)"
" Gray-shade-grow"
"\n"
"\n
main2seg in-file out-file C percent "
536
APPENDIX F. SOURCE CODE LISTINGS
"edge-type "
"\n
min-area max-area diff set-value erode"
"\n
main2seg in-file out-file E percent "
"edge-type "
"\n
min-area max-area diff set-value erode"
"\n
main2seg in-file out-file G diff "
"min-area max-area"
"\n"
"\n");
exit(0);
}
strcpy(name1, argv[1]);
strcpy(name2, argv[2]);
strcpy(type, argv[3]);
if(type[0] == ’e’ || type[0] == ’E’ ||
type[0] == ’c’ || type[0] == ’C’){
percent = atof(argv[4]);
value
= atoi(argv[5]);
value2 = atoi(argv[6]);
value3 = atoi(argv[7]);
value4 = atoi(argv[8]);
value5 = atoi(argv[9]);
value6 = atoi(argv[10]);
}
else{
value = atoi(argv[4]);
value2 = atoi(argv[5]);
value3 = atoi(argv[6]);
}
if(does_not_exist(name1)){
printf("\nERROR input file %s does not exist",
name1);
exit(0);
}
/******************************************
*
* Read the input image header, allocate
* the image arrays, and read the input
* image.
*
*******************************************/
F.10. CODE LISTINGS FOR CHAPTER 10
537
get_image_size(name1, &length, &width);
get_bitsperpixel(name1, &bits_per_pixel);
the_image = allocate_image_array(length, width);
out_image = allocate_image_array(length, width);
create_file_if_needed(name1, name2, out_image);
read_image_array(name1, the_image);
if(type[0] == ’e’ || type[0] == ’E’){
edge_region(the_image, out_image,
value, value2,
value3, value4, percent,
value5, value6,
length,
width,
bits_per_pixel);
} /* ends edge_region */
if(type[0] == ’g’ || type[0] == ’G’){
gray_shade_region(the_image, out_image,
value,
value2, value3,
length,
width);
} /* ends gray_shade_region */
if(type[0] == ’c’ || type[0] == ’C’){
edge_gray_shade_region(name1,
the_image, out_image,
value, value2, value3, value4,
percent, value5, value6,
length,
width,
bits_per_pixel);
} /* ends edge_gray_shade_region */
write_image_array(name2, out_image);
538
APPENDIX F. SOURCE CODE LISTINGS
free_image_array(out_image, length);
free_image_array(the_image, length);
} /* ends main */
Listing 10.3 - The main2seg Program
F.11 Code Listings for Chapter 11
/**********************************************
*
*
file ed.c
*
*
Functions: This file contains
*
erosion
*
dilation
*
mask_erosion
*
mask_dilation
*
interior_outline
*
exterior_outline
*
copy_3_x_3
*
opening
*
closing
*
get_shape_options
*
*
Purpose:
*
These functions perform the erosion,
*
dilation, outlining, opening and
*
closing operations.
*
*
External Calls:
*
none
*
*
Modifications:
*
14 March 1993 - created
*
21 August 1998 - modified to work on entire
*
images at once.
*
************************************************/
#include "cips.h"
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