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make the height/width ratio to recognize a 'one' settable by an option

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This commit is contained in:
Erik Auerswald
2008-12-14 11:17:48 +00:00
parent 95a1120c57
commit 511e851692
1 changed files with 16 additions and 4 deletions
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ssocr.c
+16 -4
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@@ -1182,6 +1182,7 @@ void usage(char *name, FILE *f)
fprintf(f, " -i, --ignore-pixels=# number of pixels ignored when searching digit\n");
fprintf(f, " boundaries\n");
fprintf(f, " -d, --number-digits=# number of digits in image\n");
fprintf(f, " -r, --one-ratio=# height/width ratio to recognize a \'one\'\n");
fprintf(f, " -o, --output-image=FILE write processed image to FILE\n");
fprintf(f, " -O, --output-format=FMT use output format FMT (Imlib2 formats)\n");
fprintf(f, " -p, --process-only do image processing only, no OCR\n");
@@ -1262,6 +1263,7 @@ int main(int argc, char **argv)
int need_pixels = NEED_PIXELS; /*pixels needed to recognize a segment as set*/
int number_of_digits = NUMBER_OF_DIGITS; /* look for this many digits */
int ignore_pixels = IGNORE_PIXELS; /* pixels to ignore when checking column */
int one_ratio = ONE_RATIO; /* height/width > one_ratio => digit 'one' */
double thresh=THRESHOLD; /* border between light and dark */
int offset; /* offset for shear */
double theta; /* rotation angle */
@@ -1291,6 +1293,7 @@ int main(int argc, char **argv)
{"number-pixels", 1, 0, 'n'}, /* pixels needed to regard segment as set */
{"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'}, /* wheight/width threshold to recognize a one */
{"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 */
@@ -1303,7 +1306,7 @@ int main(int argc, char **argv)
{"luminance", 1, 0, 'l'}, /* luminance formula */
{0, 0, 0, 0} /* terminate long options */
};
c = getopt_long (argc, argv, "hVt:vaTn:i:d:o:O:D::pPf:b:Igl:",
c = getopt_long (argc, argv, "hVt:vaTn:i:d:r:o:O:D::pPf:b:Igl:",
long_options, &option_index);
if (c == -1) break; /* leaves while (1) loop */
switch (c) {
@@ -1369,6 +1372,15 @@ int main(int argc, char **argv)
}
}
break;
case 'r':
if(optarg) {
one_ratio = atoi(optarg);
if(one_ratio < 2) {
fprintf(stderr, "warning: ignoring --one-ratio=%s\n", optarg);
one_ratio = ONE_RATIO;
}
}
break;
case 'o':
if(optarg) {
output_file = strdup(optarg);
@@ -1472,7 +1484,7 @@ int main(int argc, char **argv)
(ssocr_background == SSOCR_BLACK) ? "black" : "white");
fprintf(stderr, "luminance = ");
print_lum_key(lt, stderr); fprintf(stderr, "\n");
fprintf(stderr, "height/width threshold = %d\n", ONE_RATIO);
fprintf(stderr, "height/width threshold = %d\n", one_ratio);
fprintf(stderr, "optind=%d argc=%d\n", optind, argc);
fprintf(stderr, "================================================================================\n");
}
@@ -1971,10 +1983,10 @@ int main(int argc, char **argv)
/* at this point the digit 1 can be identified, because it is smaller than
* the other digits */
for(i=0; i<number_of_digits; i++) {
/* if width of digit is less than 1/ONE_RATIO of its height it is a 1
/* if width of digit is less than 1/one_ratio of its height it is a 1
* (the default 1/4 is arbitarily chosen -- normally seven segment
* displays use digits that are 2 times as high as wide) */
if((digits[i].y2-digits[i].y1)/(digits[i].x2-digits[i].x1) > ONE_RATIO) {
if((digits[i].y2-digits[i].y1)/(digits[i].x2-digits[i].x1) > one_ratio) {
if(flags & DEBUG_OUTPUT) {
fprintf(stderr, "digit %d is a 1 (height/width = %d/%d = (int) %d)\n",
i, digits[i].y2 - digits[i].y1, digits[i].x2 - digits[i].x1,