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ssocr.c
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/* Seven Segment Optical Character Recognition */
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Copyright (C) 2004-2024 Erik Auerswald <[email protected]> */
/* Copyright (C) 2013 Cristiano Fontana <[email protected]> */
/* ImLib2 Header */
#include <X11/Xlib.h> /* needed by Imlib2.h */
#include <Imlib2.h>
/* standard things */
#include <limits.h> /* INT_MAX */
#include <stdint.h> /* SIZE_MAX */
#include <stdio.h> /* puts, printf, BUFSIZ, perror, FILE */
#include <stdlib.h> /* exit */
/* string manipulation */
#include <string.h> /* memcpy, strchr, strdup, strlen */
/* option parsing */
#include <getopt.h> /* getopt */
#include <unistd.h> /* getopt */
/* file permissions */
#include <sys/stat.h> /* umask */
/* my headers */
#include "defines.h" /* defines */
#include "ssocr.h" /* types */
#include "imgproc.h" /* image processing */
#include "help.h" /* online help */
#include "charset.h" /* character set selection and printing */
/* global variables */
int ssocr_foreground = SSOCR_DEFAULT_FOREGROUND;
int ssocr_background = SSOCR_DEFAULT_BACKGROUND;
/* functions */
/* copy image from stdin to a temporary file and return the filename */
static char * tmp_imgfile(unsigned int flags)
{
char *dir;
char *name;
size_t pattern_len;
int handle;
unsigned char buf;
ssize_t count = 0;
size_t pat_suffix_len = strlen(DIR_SEP TMP_FILE_PATTERN);
size_t dir_len;
/* find a suitable place (directory) for the tmp file and create pattern */
dir = getenv("TMP");
if(dir && strlen(dir) >= SIZE_MAX - pat_suffix_len - 1) {
dir = TMP_FILE_DIR;
fprintf(stderr, "%s: warning: ignoring too long $TMP env variable\n",
PROG);
} else if(!dir) {
dir = TMP_FILE_DIR;
}
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "using directory %s for temporary files\n", dir);
}
dir_len = strlen(dir);
pattern_len = dir_len + pat_suffix_len + 1;
if(pattern_len <= dir_len) {
fputs(PROG ": error: temporary file name length overflow\n", stderr);
exit(99);
}
name = calloc(pattern_len, sizeof(char));
if(!name) {
perror(PROG ": could not allocate memory for name of temporary file");
exit(99);
}
memcpy(name, dir, dir_len);
memcpy(name + dir_len, DIR_SEP TMP_FILE_PATTERN, pat_suffix_len);
if(flags & DEBUG_OUTPUT)
fprintf(stderr, "pattern for temporary file is %s\n", name);
/* create temporary file */
umask(S_IRWXG | S_IRWXO);
handle = mkstemp(name);
if(handle < 0) {
perror(PROG ": could not create temporary file");
exit(99);
}
/* copy image data from stdin to tmp file */
while((fread(&buf, sizeof(char), 1, stdin)) > 0) {
count = write(handle, &buf, 1);
if (count <= 0) break;
}
close(handle); /* filehandle is no longer needed, Imlib2 uses filename */
if(ferror(stdin) || (count <= 0)) {
perror(PROG ": could not copy image data to temporary file");
unlink(name);
exit(99);
}
return name;
}
/* return number of foreground pixels in a scanline */
static unsigned int scanline(Imlib_Image *image, Imlib_Image *debug_image,
int x, int y, int len, direction_t dir,
color_struct d_color, double thresh,
luminance_t lt, unsigned int flags)
{
Imlib_Color imlib_color;
int lum, i, ix=x, iy=y, start, end;
unsigned int found_pixels = 0;
start = (dir == HORIZONTAL) ? x : y;
end = start + len;
for (i = start; i <= end; i++) {
if (dir == HORIZONTAL) ix = i;
else iy = i;
imlib_image_query_pixel(ix, iy, &imlib_color);
lum = get_lum(&imlib_color, lt);
if(is_pixel_set(lum, thresh)) {
if(flags & USE_DEBUG_IMAGE) {
imlib_context_set_image(*debug_image);
imlib_context_set_color(d_color.R, d_color.G, d_color.B, d_color.A);
imlib_image_draw_pixel(ix, iy, 0);
imlib_context_set_image(*image);
}
found_pixels++;
}
}
return found_pixels;
}
/* print given number of space characters to given stream */
static void print_spaces(FILE *f, int n)
{
int i;
for (i = 0; i < n; i++) {
fputc(' ', f);
}
}
/* parse dimensions given as a string in the format "WxH" */
static int parse_width_height(const char *s, dimensions_struct *d)
{
size_t l;
const char *width_string;
char *height_string;
int w, h;
if (!s || !d) {
fputs(PROG ": error: parse_width_height() called with NULL pointer\n",
stderr);
return 1;
}
l = strlen(s);
if (l == 0) {
fputs(PROG ": error: parse_width_height() called with empty string\n",
stderr);
return 1;
}
width_string = s;
height_string = strchr(s, 'x');
if (!height_string) {
fputs(PROG ": error: no 'x' in dimension specification\n", stderr);
return 1;
}
if (width_string == height_string) {
fputs(PROG ": error: width missing from dimension specification\n", stderr);
return 1;
}
height_string++;
if (strlen(height_string) == 0) {
fputs(PROG ": error: height missing from dimension specification\n",stderr);
return 1;
}
w = atoi(width_string);
h = atoi(height_string);
if (w < 1 || h < 1) {
fprintf(stderr,
PROG ": warning: ignoring mininmum character dimensions %dx%d\n",
w, h);
return 1;
}
d->w = w;
d->h = h;
return 0;
}
/* parse description of interval in one of two formats:
* 1) a single number giving both upper and lower bound
* 2) two numbers separated by a hyphen */
static int parse_interval(const char *s, interval_struct *i) {
int min, max;
char *upper;
if (!s) {
fputs(PROG ": error: empty interval description string\n", stderr);
return 1;
}
min = atoi(s);
if (min == -1) {
i->min = i->max = min;
return 0;
}
if (min < 1) {
fputs(PROG ": error: lower interval bound cannot be less than 1\n", stderr);
return 1;
}
upper = strchr(s, '-');
if (!upper) {
i->min = i->max = min;
return 0;
}
if (upper == s) {
fputs(PROG ": error: lower interval bound cannot be omitted\n", stderr);
return 1;
}
max = atoi(++upper);
if (max < min) {
fputs(PROG ": error: upper bound less than lower bound\n", stderr);
return 1;
}
i->min = min;
i->max = max;
return 0;
}
/*** main() ***/
int main(int argc, char **argv)
{
Imlib_Image image=NULL; /* an image handle */
Imlib_Image new_image=NULL; /* a temporary image handle */
Imlib_Image debug_image=NULL; /* DEBUG */
Imlib_Load_Error load_error=0; /* save Imlib2 error code on image I/O*/
char *imgfile=NULL; /* filename of image file */
int use_tmpfile=0; /* flag to know if temporary image file is used */
int i, j, d; /* iteration variables */
size_t cur_digit_mem, new_digit_mem; /* for overflow checks */
int unknown_digit=0; /* was one of the 6 found digits an unknown one? */
int need_pixels = NEED_PIXELS; /* pixels needed to set segment in scanline */
int min_segment = MIN_SEGMENT; /* minimum pixels needed for a segment */
dimensions_struct min_char_dims; /* minimum character dimensions (W x H) */
int potential_digits; /* number of potential digits after segmentation */
interval_struct expected_digits; /* expect number of digits is inside this */
int number_of_digits; /* number of digits found and accepted */
int ignore_pixels = IGNORE_PIXELS; /* pixels to ignore when checking column */
int one_ratio = ONE_RATIO; /* height/width > one_ratio => digit 'one' */
int minus_ratio = MINUS_RATIO; /* height/width > minus_ratio => char 'minus'*/
int dec_h_ratio = DEC_H_RATIO; /* max_dig_h/h > dec_h_ratio => possibly '.' */
int dec_w_ratio = DEC_W_RATIO; /* max_dig_w/w > dec_w_ratio => possibly '.' */
double spc_fac = SPC_FAC; /* add spaces if digit distance > spc_fac*min_dst */
double thresh=THRESHOLD; /* border between light and dark */
int offset; /* offset for shear */
double theta; /* rotation angle */
char *output_file=NULL; /* write processed image to file */
char *output_fmt=NULL; /* use this format */
char *debug_image_file=NULL; /* ...to this file */
unsigned int flags=0; /* set by options, see #defines in .h file */
luminance_t lt=DEFAULT_LUM_FORMULA; /* luminance function */
charset_t charset=DEFAULT_CHARSET; /* character set */
int w, h, lum; /* width, height, pixel luminance */
int col=UNKNOWN; /* is column dark or light? */
int row=UNKNOWN; /* is row dark or light? */
int dig_w; /* width of digit part of image */
int dig_h; /* height of digit part of image */
int max_dig_h=0, max_dig_w=0; /* maximum height & width of digits found */
int widest_dig_is_one=0; /* set to one if the widest digit is a one */
Imlib_Color color; /* Imlib2 RGBA color structure */
/* state of search */
int state = (ssocr_foreground == SSOCR_BLACK) ? FIND_DARK : FIND_LIGHT;
digit_struct *digits=NULL; /* position of digits in image */
int found_pixels=0; /* how many pixels are already found */
color_struct d_color = {0, 0, 0, 0}; /* drawing color */
/* initialize structures */
min_char_dims.w = MIN_CHAR_W;
min_char_dims.h = MIN_CHAR_H;
expected_digits.min = expected_digits.max = NUMBER_OF_DIGITS;
/* if we provided no arguments to the program exit */
if (argc < 2) {
usage(PROG, stderr);
exit(99);
}
/* parse command line */
while (1) {
int option_index = 0;
int c;
static struct option long_options[] = {
{"help", 0, 0, 'h'}, /* print help */
{"version", 0, 0, 'V'}, /* show version */
{"threshold", 1, 0, 't'}, /* set threshold (instead of THRESHOLD) */
{"verbose", 0, 0, 'v'}, /* talk about programm execution */
{"absolute-threshold", 0, 0, 'a'}, /* use treshold value as provided */
{"iter-threshold", 0, 0, 'T'}, /* use treshold value as provided */
{"number-pixels", 1, 0, 'n'}, /* pixels needed to regard segment as set */
{"min-segment", 1, 0, 'N'}, /* minimum pixels needed for a segment */
{"min-char-dims", 1, 0, 'M'}, /* minimum character (digit) dimensions */
{"ignore-pixels", 1, 0, 'i'}, /* pixels ignored when searching digits */
{"number-digits", 1, 0, 'd'}, /* number of digits in image */
{"one-ratio", 1, 0, 'r'}, /* height/width threshold to recognize a one */
{"minus-ratio", 1, 0, 'm'}, /* w/h threshold to recognize a minus sign */
{"output-image", 1, 0, 'o'}, /* write processed image to given file */
{"output-format", 1, 0, 'O'}, /* format of output image */
{"debug-image", 2, 0, 'D'}, /* write a debug image */
{"process-only", 0, 0, 'p'}, /* image processing only */
{"debug-output", 0, 0, 'P'}, /* print debug output? */
{"foreground", 1, 0, 'f'}, /* set foreground color */
{"background", 1, 0, 'b'}, /* set background color */
{"print-info", 0, 0, 'I'}, /* print image info */
{"adjust-gray", 0, 0, 'g'}, /* use T1 and T2 as perecntages of used vals*/
{"luminance", 1, 0, 'l'}, /* luminance formula */
{"ascii-art-segments", 0, 0, 'S'}, /* print found segments in ASCII art */
{"print-as-hex", 0, 0, 'X'}, /* change output format to hex */
{"omit-decimal-point", 0, 0, 'C'}, /* omit decimal points from output */
{"charset", 1, 0, 'c'}, /* select character set of display */
{"dec-h-ratio", 1, 0, 'H'}, /* height ratio for decimal point detection */
{"dec-w-ratio", 1, 0, 'W'}, /* width ratio for decimal point detection */
{"print-spaces", 0, 0, 's'}, /* print spaces between distant digits */
{"space-factor", 1, 0, 'A'}, /* relative distance to add spaces */
{"space-average", 0, 0, 'G'}, /* avg instead of min dst for spaces */
{0, 0, 0, 0} /* terminate long options */
};
c = getopt_long (argc, argv,
"hVt:vaTn:N:i:d:r:m:M:o:O:D::pPf:b:Igl:SXCc:H:W:sA:G",
long_options, &option_index);
if (c == -1) break; /* leaves while (1) loop */
switch (c) {
case 'h':
usage(PROG,stdout);
exit (42);
break;
case 'V':
print_version(stdout);
exit (42);
break;
case 'v':
flags |= VERBOSE;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & VERBOSE=%d\n", flags & VERBOSE);
}
break;
case 't':
if(optarg) {
thresh = atof(optarg);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "thresh = %f (default: %f)\n", thresh, THRESHOLD);
}
if(thresh < 0.0 || 100.0 < thresh) {
thresh = THRESHOLD;
if(flags & VERBOSE) {
fprintf(stderr, "ignoring --treshold=%s\n", optarg);
}
}
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "thresh = %f (default: %f)\n", thresh, THRESHOLD);
}
}
break;
case 'a':
flags |= ABSOLUTE_THRESHOLD; break;
case 'T':
flags |= DO_ITERATIVE_THRESHOLD; break;
case 'n':
if(optarg) {
need_pixels = atoi(optarg);
if(need_pixels < 1) {
fprintf(stderr, PROG ": warning: ignoring --number-pixels=%s\n",
optarg);
need_pixels = NEED_PIXELS;
}
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "need_pixels = %d\n", need_pixels);
}
}
break;
case 'N':
if(optarg) {
min_segment = atoi(optarg);
if(min_segment < 1) {
fprintf(stderr, PROG ": warning: ignoring --min-segment=%s\n",
optarg);
min_segment = MIN_SEGMENT;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "min_segment = %d\n", min_segment);
}
} else {
need_pixels = min_segment;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "min_segment = need_pixels = %d\n", min_segment);
}
}
}
break;
case 'M':
if(optarg) {
int ret;
ret = parse_width_height(optarg, &min_char_dims);
if (ret) {
fprintf(stderr, PROG ": warning: ignoring --min-char-dims=%s\n",
optarg);
}
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "min_char_dims = %dx%d\n", min_char_dims.w,
min_char_dims.h);
}
}
break;
case 'i':
if(optarg) {
ignore_pixels = atoi(optarg);
if(ignore_pixels < 0) {
fprintf(stderr, PROG ": warning: ignoring --ignore-pixels=%s\n",
optarg);
ignore_pixels = IGNORE_PIXELS;
}
}
break;
case 'd':
if(optarg) {
int ret;
ret = parse_interval(optarg, &expected_digits);
if(ret) {
fprintf(stderr, PROG ": warning: ignoring --number-digits=%s\n",
optarg);
expected_digits.min = expected_digits.max = NUMBER_OF_DIGITS;
}
if (flags & DEBUG_OUTPUT) {
fprintf(stderr, "expected_digits.min = %d\n", expected_digits.min);
fprintf(stderr, "expected_digits.max = %d\n", expected_digits.max);
}
}
break;
case 'r':
if(optarg) {
one_ratio = atoi(optarg);
if(one_ratio < 2) {
fprintf(stderr, PROG ": warning: ignoring --one-ratio=%s\n",optarg);
one_ratio = ONE_RATIO;
}
}
break;
case 'm':
if(optarg) {
minus_ratio = atoi(optarg);
if(minus_ratio < 1) {
fprintf(stderr, PROG ": warning: ignoring --minus-ratio=%s\n",
optarg);
minus_ratio = MINUS_RATIO;
}
}
break;
case 'o':
if(optarg) {
output_file = strdup(optarg);
}
break;
case 'O':
if(optarg) {
output_fmt = strdup(optarg);
}
break;
case 'D':
flags |= USE_DEBUG_IMAGE;
if(optarg) {
debug_image_file = strdup(optarg);
} else {
debug_image_file = strdup(DEBUG_IMAGE_NAME);
}
break;
case 'p':
flags |= PROCESS_ONLY; break;
case 'P':
flags |= (VERBOSE | DEBUG_OUTPUT); break;
case 'f':
if(optarg) {
if(strcasecmp(optarg, "black") == 0) {
set_fg_color(SSOCR_BLACK);
set_bg_color(SSOCR_WHITE);
} else if(strcasecmp(optarg, "white") == 0) {
set_fg_color(SSOCR_WHITE);
set_bg_color(SSOCR_BLACK);
} else {
fprintf(stderr, "%s: error: unknown foreground color %s,"
" color must be black or white\n", PROG, optarg);
exit(99);
}
}
break;
case 'b':
if(optarg) {
if(strcasecmp(optarg, "black") == 0) {
set_bg_color(SSOCR_BLACK);
set_fg_color(SSOCR_WHITE);
} else if(strcasecmp(optarg, "white") == 0) {
set_bg_color(SSOCR_WHITE);
set_fg_color(SSOCR_BLACK);
} else {
fprintf(stderr, "%s: error: unknown background color %s,"
" color must be black or white\n", PROG, optarg);
exit(99);
}
}
break;
case 'I':
flags |= PRINT_INFO;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & PRINT_INFO=%d\n", flags & PRINT_INFO);
}
break;
case 'g':
flags |= ADJUST_GRAY;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & ADJUST_GRAY=%d\n", flags & ADJUST_GRAY);
}
break;
case 'l':
if(optarg) {
lt = parse_lum(optarg);
if(lt == LUM_PARSE_ERROR) {
fprintf(stderr,
PROG ": warning: ignoring unknown luminance formula '%s'\n",
optarg);
lt = DEFAULT_LUM_FORMULA;
}
}
break;
case 'S':
flags |= ASCII_ART_SEGMENTS;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & ASCII_ART_SEGMENTS=%d\n",
flags & ASCII_ART_SEGMENTS);
}
break;
case 'X':
flags |= PRINT_AS_HEX;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & PRINT_AS_HEX=%d\n",
flags & PRINT_AS_HEX);
}
break;
case 'C':
flags |= OMIT_DECIMAL;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & OMIT_DECIMAL=%d\n",
flags & OMIT_DECIMAL);
}
break;
case 'c':
if(optarg) {
charset = parse_charset(optarg);
if(charset == CS_PARSE_ERROR) {
fprintf(stderr, PROG ": warning: ignoring unknown charset '%s'\n",
optarg);
charset = DEFAULT_CHARSET;
}
}
break;
case 'H':
if(optarg) {
dec_h_ratio = atoi(optarg);
if(dec_h_ratio < 2) {
fprintf(stderr, PROG ": warning: ignoring --dec-h-ratio=%s\n",
optarg);
dec_h_ratio = DEC_H_RATIO;
}
}
break;
case 'W':
if(optarg) {
dec_w_ratio = atoi(optarg);
if(dec_w_ratio < 1) {
fprintf(stderr, PROG ": warning: ignoring --dec-w-ratio=%s\n",
optarg);
dec_w_ratio = DEC_W_RATIO;
}
}
break;
case 's':
flags |= PRINT_SPACES;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & PRINT_SPACES=%d\n", flags & PRINT_SPACES);
}
break;
case 'A':
if(optarg) {
spc_fac = atof(optarg);
if(spc_fac < 1.0) {
spc_fac = SPC_FAC;
if(flags & (VERBOSE | DEBUG_OUTPUT)) {
fprintf(stderr, "ignoring --space-factor=%s\n", optarg);
}
}
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "spc_fac = %f (default: %f)\n", spc_fac, SPC_FAC);
}
}
break;
case 'G':
flags |= SPC_USE_AVG_DST;
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "flags & SPC_USE_AVG_DST=%d\n",
flags & SPC_USE_AVG_DST);
}
break;
case '?': /* missing argument or character not in optstring */
short_usage(PROG,stderr);
exit (2);
break;
default: /* this should not be reached */
if((c>31) && (c<127)) {
fprintf (stderr, "%s: error: getopt returned unhandled character %c"
" (code %X)\n", PROG, c, c);
} else {
fprintf (stderr, "%s: error: getopt returned unhandled character code"
" %X\n", PROG, c);
}
short_usage(PROG, stderr);
exit(99);
}
}
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "================================================================================\n");
fprintf(stderr, "VERSION=%s\n", VERSION);
fprintf(stderr, "flags & VERBOSE=%d\nthresh=%f\n", flags & VERBOSE, thresh);
fprintf(stderr, "flags & PRINT_INFO=%d\nflags & ADJUST_GRAY=%d\n",
flags & PRINT_INFO, flags & ADJUST_GRAY);
fprintf(stderr, "flags & ABSOLUTE_THRESHOLD=%d\n",flags&ABSOLUTE_THRESHOLD);
fprintf(stderr, "flags & DO_ITERATIVE_THRESHOLD=%d\n",
flags & DO_ITERATIVE_THRESHOLD);
fprintf(stderr, "flags & USE_DEBUG_IMAGE=%d\n", flags & USE_DEBUG_IMAGE);
fprintf(stderr, "flags & DEBUG_OUTPUT=%d\n", flags & DEBUG_OUTPUT);
fprintf(stderr, "flags & PROCESS_ONLY=%d\n", flags & PROCESS_ONLY);
fprintf(stderr, "flags & ASCII_ART_SEGMENTS=%d\n",
flags & ASCII_ART_SEGMENTS);
fprintf(stderr, "flags & PRINT_AS_HEX=%d\n", flags & PRINT_AS_HEX);
fprintf(stderr, "flags & OMIT_DECIMAL=%d\n", flags & OMIT_DECIMAL);
fprintf(stderr, "flags & PRINT_SPACES=%d\n", flags & PRINT_SPACES);
fprintf(stderr, "flags & SPC_USE_AVG_DST=%d\n", flags & SPC_USE_AVG_DST);
fprintf(stderr, "need_pixels = %d\n", need_pixels);
fprintf(stderr, "min_segment = %d\n", min_segment);
fprintf(stderr, "min_char_dims = %dx%d\n",min_char_dims.w,min_char_dims.h);
fprintf(stderr, "ignore_pixels = %d\n", ignore_pixels);
fprintf(stderr, "expected_digits.min = %d\n", expected_digits.min);
fprintf(stderr, "expected_digits.max = %d\n", expected_digits.max);
fprintf(stderr, "foreground = %d (%s)\n", ssocr_foreground,
(ssocr_foreground == SSOCR_BLACK) ? "black" : "white");
fprintf(stderr, "background = %d (%s)\n", ssocr_background,
(ssocr_background == SSOCR_BLACK) ? "black" : "white");
fprintf(stderr, "luminance = ");
print_lum_key(lt, stderr); fprintf(stderr, "\n");
fprintf(stderr, "charset = ");
print_cs_key(charset, stderr); fprintf(stderr, "\n");
fprintf(stderr, "height/width threshold for one = %d\n", one_ratio);
fprintf(stderr, "width/height threshold for minus = %d\n", minus_ratio);
fprintf(stderr, "max_dig_h/h threshold for decimal = %d\n", dec_h_ratio);
fprintf(stderr, "max_dig_w/w threshold for decimal = %d\n", dec_w_ratio);
fprintf(stderr, "distance factor for adding spaces = %.2f\n", spc_fac);
fprintf(stderr, "optind=%d argc=%d\n", optind, argc);
fprintf(stderr, "================================================================================\n");
}
/* if no argument left exit the program */
if(optind >= argc) {
fprintf(stderr, "%s: error: no image filename given\n", PROG);
short_usage(PROG, stderr);
exit(99);
}
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "argv[argc-1]=%s used as image file name\n", argv[argc-1]);
}
/* load the image */
imgfile = argv[argc-1];
if(strcmp("-", imgfile) == 0) /* read image from stdin? */ {
if(flags & VERBOSE)
fprintf(stderr, "using temporary file to hold data from stdin\n");
use_tmpfile = 1;
imgfile = tmp_imgfile(flags);
}
if(flags & VERBOSE) {
fprintf(stderr, "loading image %s\n", imgfile);
}
image = imlib_load_image_with_error_return(imgfile, &load_error);
if(use_tmpfile) {
if(flags & VERBOSE)
fprintf(stderr, "removing temporary image file %s\n", imgfile);
unlink(imgfile);
free(imgfile);
imgfile = argv[argc-1];
}
if(!image) {
fprintf(stderr, "%s: error: could not load image %s\n", PROG, imgfile);
report_imlib_error(load_error);
exit(99);
}
/* set the image we loaded as the current context image to work on */
imlib_context_set_image(image);
/* get image parameters */
w = imlib_image_get_width();
h = imlib_image_get_height();
if((flags & DEBUG_OUTPUT) || (flags & PRINT_INFO)) {
fprintf(stderr, "image width: %d\nimage height: %d\n",w,h);
}
/* get minimum and maximum "value" values */
if((flags & DEBUG_OUTPUT) || (flags & PRINT_INFO)) {
fprintf(stderr, "%.2f <= lum <= %.2f (lum should be in [0,255])\n",
get_minval(&image, 0, 0, -1, -1, lt),
get_maxval(&image, 0, 0, -1, -1, lt));
}
/* adapt threshold to image */
thresh = adapt_threshold(&image, thresh, lt, 0, 0, -1, -1, flags);
/* process commands */
if(flags & VERBOSE) /* then print found commands */ {
if(optind >= argc-1) {
fprintf(stderr, "no commands given, using image %s unmodified\n",
imgfile);
} else {
fprintf(stderr, "got commands");
for(i=optind; i<argc-1; i++) {
fprintf(stderr, " %s", argv[i]);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (argv[%d])", i);
}
}
fprintf(stderr, "\n");
}
}
if(optind < argc-1) /* then process commands */ {
for(i=optind; i<argc-1; i++) {
if(strcasecmp("dilation",argv[i]) == 0) {
int n=atoi(argv[i+1]);
if((n>0) && (i+1<argc-1)) {
if(flags & VERBOSE) {
fprintf(stderr, " processing dilation %d", n);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
i++;
new_image = dilation(&image, thresh, lt, n);
} else {
if(flags & VERBOSE) fputs(" processing dilation (1)\n", stderr);
new_image = dilation(&image, thresh, lt, 1);
}
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("erosion",argv[i]) == 0) {
int n=atoi(argv[i+1]);
if((n>0) && (i+1<argc-1)) {
if(flags & VERBOSE) {
fprintf(stderr, " processing erosion %d", n);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
i++;
new_image = erosion(&image, thresh, lt, n);
} else {
if(flags & VERBOSE) fputs(" processing erosion (1)\n", stderr);
new_image = erosion(&image, thresh, lt, 1);
}
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("opening",argv[i]) == 0) {
int n=atoi(argv[i+1]);
if((n>0) && (i+1<argc-1)) {
if(flags & VERBOSE) {
fprintf(stderr, " processing opening %d", n);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
i++;
new_image = opening(&image, thresh, lt, n);
} else {
if(flags & VERBOSE) fputs(" processing opening (1)\n", stderr);
new_image = opening(&image, thresh, lt, 1);
}
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("closing",argv[i]) == 0) {
int n=atoi(argv[i+1]);
if((n>0) && (i+1<argc-1)) {
if(flags & VERBOSE) {
fprintf(stderr, " processing closing %d", n);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
i++;
new_image = closing(&image, thresh, lt, n);
} else {
if(flags & VERBOSE) fputs(" processing closing (1)\n", stderr);
new_image = closing(&image, thresh, lt, 1);
}
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("remove_isolated",argv[i]) == 0) {
if(flags & VERBOSE) fputs(" processing remove_isolated\n", stderr);
new_image = remove_isolated(&image, thresh, lt);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("make_mono",argv[i]) == 0) {
if(flags & VERBOSE) fputs(" processing make_mono\n", stderr);
new_image = make_mono(&image, thresh, lt);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("white_border",argv[i]) == 0) {
int bdwidth=atoi(argv[i+1]);
if((bdwidth>0) && (i+1<argc-1)) {
if(flags & VERBOSE) {
fprintf(stderr, " processing white_border %d", bdwidth);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
new_image = white_border(&image, bdwidth);
i++;
} else {
if(flags & VERBOSE)
fputs(" processing white_border (1)\n", stderr);
new_image = white_border(&image, 1);
}
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("shear",argv[i]) == 0) {
if(flags & VERBOSE) {
fprintf(stderr, " processing shear %d", atoi(argv[i+1]));
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
if(i+1<argc-1) {
offset = (int) atoi(argv[++i]); /* sideeffect: increment i */
new_image = shear(&image, offset);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else {
fprintf(stderr, "%s: error: shear command needs an argument\n", PROG);
exit(99);
}
} else if(strcasecmp("set_pixels_filter",argv[i]) == 0) {
int mask;
if(flags & VERBOSE) {
fprintf(stderr," processing set_pixels_filter %d", atoi(argv[i+1]));
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
if(i+1<argc-1) {
mask = (int) atoi(argv[++i]); /* sideeffect: increment i */
new_image = set_pixels_filter(&image, thresh, lt, mask);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else {
fprintf(stderr, "%s: error: set_pixels_filter command needs an:"
" argument\n", PROG);
exit(99);
}
} else if(strcasecmp("keep_pixels_filter",argv[i]) == 0) {
int mask;
if(flags & VERBOSE) {
fprintf(stderr," processing keep_pixels_filter %d",atoi(argv[i+1]));
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, " (from string %s)", argv[i+1]);
}
fprintf(stderr, "\n");
}
if(i+1<argc-1) {
mask = (int) atoi(argv[++i]); /* sideeffect: increment i */
new_image = keep_pixels_filter(&image, thresh, lt, mask);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else {
fprintf(stderr, "%s: error: keep_pixels_filter command needs an"
" argument\n", PROG);
exit(99);
}
} else if(strcasecmp("dynamic_threshold",argv[i]) == 0) {
if(i+2<argc-1) {
int ww, wh;
ww = atoi(argv[i+1]);
wh = atoi(argv[i+2]);
if(flags & VERBOSE) {
fprintf(stderr, " processing dynamic_threshold %d %d", ww, wh);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr," (from strings %s and %s)",argv[i+1],argv[i+2]);
}
fprintf(stderr, "\n");
}
i+=2; /* skip the arguments to dynamic_threshold */
new_image = dynamic_threshold(&image, thresh, lt, ww, wh);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else {
fprintf(stderr, "%s: error: dynamic_threshold command needs two"
" arguments\n", PROG);
exit(99);
}
} else if(strcasecmp("rgb_threshold",argv[i]) == 0) {
if(flags & VERBOSE) fputs(" processing rgb_threshold\n", stderr);
new_image = make_mono(&image, thresh, MINIMUM);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("r_threshold",argv[i]) == 0) {
if(flags & VERBOSE) fputs(" processing r_threshold\n", stderr);
new_image = make_mono(&image, thresh, RED);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("g_threshold",argv[i]) == 0) {
if(flags & VERBOSE) fputs(" processing g_threshold\n", stderr);
new_image = make_mono(&image, thresh, GREEN);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("b_threshold",argv[i]) == 0) {
if(flags & VERBOSE) fputs(" processing b_threshold\n", stderr);
new_image = make_mono(&image, thresh, BLUE);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("invert",argv[i]) == 0) {
if(flags & VERBOSE) fputs(" processing invert\n", stderr);
new_image = invert(&image, thresh, lt);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else if(strcasecmp("gray_stretch",argv[i]) == 0) {
if(i+2<argc-1) {
double t1, t2;
t1 = atof(argv[i+1]);
t2 = atof(argv[i+2]);
if(flags & VERBOSE) {
fprintf(stderr, " processing gray_stretch %.2f %.2f", t1, t2);
if(flags & DEBUG_OUTPUT) {
fprintf(stderr," (from strings %s and %s)",argv[i+1],argv[i+2]);
}
fprintf(stderr, "\n");
}
if(flags & ADJUST_GRAY) {
double min=-1.0, max=-1.0;
if(flags & VERBOSE) {
fprintf(stderr, " adjusting T1=%.2f and T2=%.2f to image\n",
t1, t2);
}
min = get_minval(&image, 0, 0, -1, -1, lt);
max = get_maxval(&image, 0, 0, -1, -1, lt);
t1 = min + t1/100.0 * (max - min);
t2 = min + t2/100.0 * (max - min);
if(flags & VERBOSE) {
fprintf(stderr, " adjusted to T1=%.2f and T2=%.2f\n", t1, t2);
}
}
i+=2; /* skip the arguments to gray_stretch */
new_image = gray_stretch(&image, t1, t2, lt);
imlib_context_set_image(image);
imlib_free_image();
image = new_image;
} else {