F.7. CODELISTINGSFORCHAPTER7
469
char
name2[MAX_NAME_LENGTH];
char
low_high[MAX_NAME_LENGTH];
int
i, j, size, type;
long
bits_per_pixel, length, width;
short
**the_image, **out_image, filter[3][3];
/******************************************
*
*
Ensure the command line is correct.
*
******************************************/
if(argc < 5 5 || argc c > 6){
printf(
"\nusage 1: mfilter in-image out-image e g g Low-High type]"
"\n
OR"
"\nusage 2: mfilter in-image out-image e High-Low-Median n size"
"\n
h - high pixel"
"\n
l - low pixel"
"\n
m - median pixel"
"\n
"
"\n Using the General type requires entering "
"\n the type per the following table"
"\n L - - 6"
"\n L - - 9"
"\n L - 10"
"\n L - 16"
"\n L - 32"
"\n H - - 1"
"\n H - - 2"
"\n H - - 3"
"\n Using the High-Low-Median type requirs entering "
"\n the size of the filtered area 3 (3x3) 5, 7, 9, etc.");
exit(0);
}
strcpy(name1, argv[1]);
strcpy(name2, argv[2]);
if(does_not_exist(name1)){
printf("\nERROR input file %s does not exist",
name1);
exit(0);
} /* * ends if does_not_exist */
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470
APPENDIXF. SOURCECODELISTINGS
/******************************************
*
*
Read the input image header, allocate
*
the image arrays, create the output
*
image, and read the input image.
*
******************************************/
create_image_file(name1, name2);
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);
read_image_array(name1, the_image);
/******************************************
*
*
Call the proper image filter function
*
per the command line.
*
******************************************/
/* General filtering case */
if(argc == 6){
strcpy(low_high, argv[4]);
type = atoi(argv[5]);
filter_image(the_image, out_image,
length,
width,
bits_per_pixel,
filter, type, , low_high);
} /* * ends if argc == 6 */
/* High, Low, and Median filtering cases */
if(argc == 5){
strcpy(low_high, argv[3]);
size = atoi(argv[4]);
if(low_high[0] == ’h’ || low_high[0] == ’H’)
high_pixel(the_image, out_image,
length,
width,
size);
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F.8. CODELISTINGSFORCHAPTER8
471
if(low_high[0] == ’l’ || low_high[0] ] == = ’L’)
low_pixel(the_image, out_image,
length,
width,
size);
if(low_high[0] == ’m’ || low_high[0] ] == = ’M’)
median_filter(the_image, out_image,
length,
width,
size);
} /* * ends if argc == 5 */
/******************************************
*
*
Write the output image and free e the
*
image arrays: THE END
*
******************************************/
write_image_array(name2, out_image);
free_image_array(the_image, length);
free_image_array(out_image, length);
} /* * ends main */
Listing7.2-ThemlterProgram
F.8 CodeListingsforChapter8
/***********************************************
*
*
file addsub.c
*
*
Functions: This file contains
*
add_image_array
*
subtract_image_array
*
*
Purpose:
*
These functions implement
*
image addition and subtraction.
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472
APPENDIXF. SOURCECODELISTINGS
*
*
External Calls:
*
none
*
*
Modifications:
*
1 April 1992 - created
*
*************************************************/
#include "cips.h"
/*******************************************
*
*
add_image_array(...
*
*
This function adds two image arrays.
*
The image array out_image e will l hold
*
the result.
*
*******************************************/
add_image_array(the_image, out_image, rows, cols, max)
int
rows, cols;
short **the_image,
**out_image,
max;
{
int
i, j;
for(i=0; i<rows; i++){
for(j=0; j<cols; j++){
out_image[i][j] = the_image[i][j] +
out_image[i][j];
if(out_image[i][j] > max)
out_image[i][j] = max;
} /* * ends loop over j */
} /* * ends loop over i */
} /* * ends add_image_array */
/*******************************************
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F.8. CODELISTINGSFORCHAPTER8
473
*
*
subtract_image_array(...
*
*
This function subtracts two image e arrays.
*
The image array out_image will hold
*
the result.
*
*******************************************/
subtract_image_array(the_image, out_image, , rows, , cols)
int
rows, cols;
short **the_image,
**out_image;
{
int
i, j, length, width;
for(i=0; i<rows; i++){
for(j=0; j<cols; j++){
out_image[i][j] = the_image[i][j] ] -
out_image[i][j];
if(out_image[i][j] < 0)
out_image[i][j] = 0;
} /* * ends loop over j */
} /* * ends loop over i */
} /* * ends subtract_image_array */
Listing8.1-ImageAdditionandSubtractionRoutines
/***********************************************
*
*
file mainas.c
*
*
Functions: This file contains
*
main
*
*
Purpose:
*
This file contains the main calling
*
routine in an image addition and d subtraction
*
program.
*
*
External Calls:
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474
APPENDIXF. SOURCECODELISTINGS
*
imageio.c - create_image_file
*
read_image_array
*
write_image_array
*
get_image_size
*
get_bitsperpixel
*
allocate_image_array
*
free_image_array
*
does_not_exist
*
are_not_same_size
*
addsub.c - - add_image_array
*
subtract_image_array
*
*
Modifications:
*
1 April 1992 - created
*
10 August 1998 - modified to work on entire
*
images at one time.
*
18 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], , name3[80];
long
bits_per_pixel, length, width;
short
**image1, **image2;
short
max;
/******************************************
*
* Interpret t the command line parameters.
*
*******************************************/
if(argc != 5){
printf(
"\n"
"\n usage: mainas in1-file in2-file "
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F.8. CODELISTINGSFORCHAPTER8
475
"out_file add-subtract"
"\n"
"\n
recall add-subtract a=add s=subtract\n");
exit(0);
}
strcpy(name1, argv[1]);
strcpy(name2, argv[2]);
strcpy(name3, argv[3]);
if(does_not_exist(name1)){
printf("\nERROR input file %s does not t exist",
name1);
exit(0);
}
if(does_not_exist(name2)){
printf("\nERROR input file %s does not t exist",
name2);
exit(0);
}
/******************************************
*
* Ensure e the two input images have e the
* same e sizes.
*
*******************************************/
if(are_not_same_size(name1, name2)){
printf(
"\nERROR Image files %s and %s are not same size",
name1, name2);
exit(0);
}
/******************************************
*
* Allocate e the two image arrays
*
*******************************************/
get_image_size(name1, &length, &width);
get_bitsperpixel(name1, &bits_per_pixel);
image1 = allocate_image_array(length, width);
476
APPENDIXF. SOURCECODELISTINGS
image2 = allocate_image_array(length, width);
/******************************************
*
* Create e the output file e and d read the
* two o input images.
*
*******************************************/
create_image_file(name1, name3);
read_image_array(name1, image1);
read_image_array(name2, image2);
/********************************************
*
*
Add or subtract the input images and
*
write the result to the output image.
*
********************************************/
if(argv[4][0] == ’a’ || argv[4][0] == ’A’){
if(bits_per_pixel == 4)
max = 16;
else
max = 255;
add_image_array(image1, image2,
length, width, max);
} /* * ends if add */
if(argv[4][0] == ’s’ || argv[4][0] == ’S’)
subtract_image_array(image1, image2,
length, width);
write_image_array(name3, image2);
free_image_array(image1, length);
free_image_array(image2, length);
} /* * ends main n */
Listing8.2-ThemainasProgram
F.8. CODELISTINGSFORCHAPTER8
477
/***********************************************
*
*
file cutp.c
*
*
Functions: This file contains
*
paste_image_piece
*
check_cut_and_paste_limits
*
*
Purpose:
*
These functions paste a part of one
*
image into another image.
*
*
External Calls:
*
none
*
*
Modifications:
*
3 April 1992 - created
*
12 August 1998 - modified to o work
*
with an entire image array.
*
*************************************************/
#include "cips.h"
/*******************************************
*
*
paste_image_piece(...
*
*
This function pastes a rectangular
*
piece of an image into another image.
*
The rectangle to be pasted into the image
*
is described by the il1, ie1, ll1, le1
*
parameters for the input image.
*
*******************************************/
paste_image_piece(the_image, out_image,
il1, ie1, ll1, le1,
il2, ie2)
int
il1, ie1, ll1, le1, il2, ie2;
short **the_image,
**out_image;
478
APPENDIXF. SOURCECODELISTINGS
{
int i, j, limit1, limit2;
limit1 = ll1-il1;
limit2 = le1-ie1;
for(i=0; i<limit1; i++){
for(j=0; j<limit2; j++){
out_image[il2+i][ie2+j] = = the_image[il1+i][ie1+j];
}
}
} /* * ends paste_image_piece */
/*******************************************
*
*
check_cut_and_paste_limits(...
*
*
This function looks at the line and
*
element parameters and ensures that they
*
are not bigger than ROWS S and d COLS. . If
*
they are bigger, the last element or
*
last line parameters are e reduced.
*
*******************************************/
check_cut_and_paste_limits(
il1, ie1,
ll1, le1,
il2, ie2,
image1_length,
image1_width,
image2_length,
image2_width,
is_ok)
int il1, ie1, ll1, le1, il2, ie2,
image1_length, image1_width,
image2_length, image2_width,
*is_ok;
{
int result = 1;
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