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F.4. CODE LISTINGS FOR CHAPTER 4
419
vline(hist, LEFT+150, l-UP+2, l-UP);
vline(hist, LEFT+200, l-UP+2, l-UP);
vline(hist, LEFT+250, l-UP+2, l-UP);
for(i=0; i<GRAY_LEVELS+1; i++)
if(histogram[i] > max)
max = histogram[i];
if(max > (l-UP-UP))
scale = max/(l-5*UP);
else
scale = 1;
printf("\n max=%ld scale=%ld",max, scale);
for(i=0; i<GRAY_LEVELS+1; i++){
amount = histogram[i]/scale;
if(amount > 0){
vline(hist, i+LEFT, l-UP, l-UP-amount);
} /* ends if not zero */
} /* ends loop over i GRAY_LEVELS */
write_image_array(argv[2], hist);
free_image_array(image, length);
free_image_array(hist, l);
} /* ends main */
vline(image, ie, il, ll)
int ie, il, ll;
short **image;
{
int i, j;
for(i=il; i>=ll; i--)
image[i][ie] = SPOT;
} /* ends vline */
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420
APPENDIX F. SOURCE CODE LISTINGS
hline(image, il, ie, le)
int il, ie, le;
short **image;
{
int i, j;
for(i=ie; i<=le; i++)
image[il][i] = SPOT;
} /* ends hline */
Listing 4.3 - The himage Program
/***********************************************
*
*
file d:\cips\side.c
*
*
Functions: This file contains
*
main
*
print_side_usage
*
*
Purpose:
*
This file contains the main calling
*
routine for a program which
*
takes two images and pastes them
*
together side by side or top to bottom
*
into a new image file.
*
*
There are three files: two input files
*
(file1 and file2), and one output
*
file (file3).
*
*
External Calls:
*
read_image_array
*
write_image_array
*
get_image_size
*
allocate_image_array
*
free_image_array
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F.4. CODE LISTINGS FOR CHAPTER 4
421
*
create_allocate_tiff_file
*
create_allocate_bmp_file
*
read_bm_header
*
read_bmp_file_header
*
read_bm_header
*
*
Modifications:
*
19 April 1992 - created
*
13 August 1998 - modified to work on an
*
entire image at one time.
*
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
method[80], name1[80], name2[80], name3[80];
int
i, j;
long
length1, length2, length3,
width1, width2, width3;
short
**image1, **image2, **image3;
struct bmpfileheader
bmp_file_header;
struct bitmapheader
bmheader;
struct tiff_header_struct tiff_file_header;
/******************************************
*
* Interpret the command line parameters.
*
*******************************************/
if(argc != 5){
print_side_usage();
exit(0);
}
strcpy(name1, argv[1]);
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422
APPENDIX F. SOURCE CODE LISTINGS
strcpy(name2, argv[2]);
strcpy(name3, argv[3]);
strcpy(method, argv[4]);
if(method[0] != ’t’
&&
method[0] != ’T’
&&
method[0] != ’s’
&&
method[0] != ’S’){
printf("\nERROR: Did not choose a valid method");
print_side_usage();
exit(4);
}
if(does_not_exist(name1)){
printf("\nERROR: Input file %s does not exist",
name1);
print_side_usage();
exit(2);
}
if(does_not_exist(name2)){
printf("\nERROR: Input file %s does not exist",
name2);
print_side_usage();
exit(3);
}
/*******************************************
*
*
Look at the sizes of the two input
*
files. Ensure they are the correct
*
dimensions and set the dimensions
*
of the output image.
*
********************************************/
get_image_size(name1, &length1, &width1);
get_image_size(name2, &length2, &width2);
if(method[0] == ’T’ || method[0] == ’t’){
if(width1 != width2){
printf("\nERROR: input images are not "
"the same width");
exit(4);
} /* ends if widths are unequal */
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F.4. CODE LISTINGS FOR CHAPTER 4
423
else{
width3 = width1;
length3 = length1 + length2;
} /* ends else widths are ok */
} /* ends if method is T */
if(method[0] == ’S’ || method[0] == ’s’){
if(length1 != length2){
printf("\nERROR: input images are not "
"the same length");
exit(4);
} /* ends if lengths are unequal */
else{
width3 = width1 + width2;
length3 = length1;
} /* ends else lengths are ok */
} /* ends if method is S */
/*******************************************
*
*
Create the output image to be the same
*
type as the first input image.
*
********************************************/
if(is_a_tiff(name1)){
read_tiff_header(name1, &tiff_file_header);
tiff_file_header.image_length = length3;
tiff_file_header.image_width = width3;
create_allocate_tiff_file(name3,
&tiff_file_header);
}
if(is_a_bmp(name1)){
read_bmp_file_header(name1,
&bmp_file_header);
read_bm_header(name1, &bmheader);
bmheader.height = length3;
bmheader.width = width3;
create_allocate_bmp_file(name3,
&bmp_file_header,
&bmheader);
}
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424
APPENDIX F. SOURCE CODE LISTINGS
/*******************************************
*
*
Allocate the image arrays and read the
*
two input images.
*
*********************************************/
image1 = allocate_image_array(length1, width1);
image2 = allocate_image_array(length2, width2);
image3 = allocate_image_array(length3, width3);
read_image_array(name1, image1);
read_image_array(name2, image2);
/*******************************************
*
*
First do the side by side option.
*
*********************************************/
if(method[0] == ’S’ || method[0] == ’s’){
for(i=0; i<length1; i++)
for(j=0; j<width1; j++)
image3[i][j] = image1[i][j];
for(i=0; i<length2; i++)
for(j=0; j<width2; j++)
image3[i][j+width1] = image2[i][j];
} /* ends if side-by-side method */
/********************************************
*
*
Now do the top to bottom option.
*
*********************************************/
if(method[0] == ’T’ || method[0] == ’t’){
for(i=0; i<length1; i++)
for(j=0; j<width1; j++)
image3[i][j] = image1[i][j];
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F.5. CODE LISTINGS FOR CHAPTER 5
425
for(i=0; i<length2; i++)
for(j=0; j<width2; j++)
image3[i+length1][j] = image2[i][j];
} /* ends top-to-bottom method */
write_image_array(name3, image3);
free_image_array(image1, length1);
free_image_array(image2, length2);
free_image_array(image3, length3);
} /* ends main */
print_side_usage()
{
printf(
"\n"
"\n usage: side in-file-1 in-file-2 "
"out-file method"
"\n
where method is Top-to-bottom "
"or Side-by-side"
"\n");
}
Listing 4.4 - The side Program
F.5 Code Listings for Chapter 5
/***********************************************
*
*
file edge.c
*
*
Functions: This file contains
*
detect_edges
*
setup_masks
*
get_edge_options
*
perform_convolution
426
APPENDIX F. SOURCE CODE LISTINGS
*
quick_edge
*
*
Purpose:
*
These functions implement several
*
types of basic edge detection.
*
*
External Calls:
*
utility.c - fix_edges
*
*
Modifications:
*
27 January 1991 - created
*
27 December 1992 - Fixed an error in
*
how I did the 8 direction edge
*
detectors. I was only detecting
*
edges in the last (the 7)
*
direction. I fixed this by
*
setting the out_image to the sum
*
only if the sum was greater than
*
the out_image. This is in the
*
function perform_convolution.
*
22 April 1998 - added capability to
*
work an entire image at one time.
*
*************************************************/
#include "cips.h"
short quick_mask[3][3] = {
{-1, 0, -1},
{ 0, 4, 0},
{-1, 0, -1} };
/***************************
*
*
Directions for the masks
* 3 2 1
* 4 x 0
* 5 6 7
*
****************************/
/* masks for kirsch operator */
short kirsch_mask_0[3][3] = {
{ 5, 5, 5},
F.5. CODE LISTINGS FOR CHAPTER 5
427
{-3, 0, -3},
{-3, -3, -3} };
short kirsch_mask_1[3][3] = {
{-3, 5, 5},
{-3, 0, 5},
{-3, -3, -3} };
short kirsch_mask_2[3][3] = {
{-3, -3, 5},
{-3, 0, 5},
{-3, -3, 5} };
short kirsch_mask_3[3][3] = {
{-3, -3, -3},
{-3, 0, 5},
{-3, 5, 5} };
short kirsch_mask_4[3][3] = {
{-3, -3, -3},
{-3, 0, -3},
{ 5, 5, 5} };
short kirsch_mask_5[3][3] = {
{-3, -3, -3},
{ 5, 0, -3},
{ 5, 5, -3} };
short kirsch_mask_6[3][3] = {
{ 5, -3, -3},
{ 5, 0, -3},
{ 5, -3, -3} };
short kirsch_mask_7[3][3] = {
{ 5, 5, -3},
{ 5, 0, -3},
{-3, -3, -3} };
/* masks for prewitt operator */
428
APPENDIX F. SOURCE CODE LISTINGS
short prewitt_mask_0[3][3] = {
{ 1, 1, 1},
{ 1, -2, 1},
{-1, -1, -1} };
short prewitt_mask_1[3][3] = {
{ 1, 1, 1},
{ 1, -2, -1},
{ 1, -1, -1} };
short prewitt_mask_2[3][3] = {
{ 1, 1, -1},
{ 1, -2, -1},
{ 1, 1, -1} };
short prewitt_mask_3[3][3] = {
{ 1, -1, -1},
{ 1, -2, -1},
{ 1, 1, 1} };
short prewitt_mask_4[3][3] = {
{-1, -1, -1},
{ 1, -2, 1},
{ 1, 1, 1} };
short prewitt_mask_5[3][3] = {
{-1, -1, 1},
{-1, -2, 1},
{ 1, 1, 1} };
short prewitt_mask_6[3][3] = {
{-1, 1, 1},
{-1, -2, 1},
{-1, 1, 1} };
short prewitt_mask_7[3][3] = {
{ 1, 1, 1},
{-1, -2, 1},
{-1, -1, 1} };
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