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initial commit
2012-09-16 12:33:11 +00:00
/*
This is a Optical-Character-Recognition program
Copyright (C) 2000-2008 Joerg Schulenburg
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 2
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
see README for email address
ToDo:
- transform special xml bar code symbols (<>&) to xml symbols (&lt;&gt;&amp;)
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "pgm2asc.h"
#include "gocr.h"
#include "pnm.h"
#ifndef DO_DEBUG /* can be defined outside (configure --with-debug) */
#define DO_DEBUG 0 /* 0 is the default */
#endif
#undef g_debug
#if DO_DEBUG
# define g_debug(a) a
#else
# define g_debug(a)
#endif
/*
detect barcode and add a XML-string to the box (obj-pointer, ToDo)
ToDo: barcode-output stderr->stdout
*/
double sqr(double x) { return(x*x); }
/* ----------------------------- code128 ---------------------------- *
* "BSBSBS", B=Bar, S=Space, better using 2*6=12bit-integer? */
#define Num128 107
const char *code128[Num128+1]={ /* can be generated by an algorithm? */
/* 00 */"212222","222122","222221","121223","121322","131222","122213","122312",
/* 08 */"132212","221213","221312","231212","112232","122132","122231","113222",
/* 16 */"123122","123221","223211","221132","221231","213212","223112","312131",
/* 24 */"311222","321122","321221","312212","322112","322211","212123","212321",
/* 32 */"232121","111323","131123","131321","112313","132113","132311","211313",
/* 40 */"231113","231311","112133","112331","132131","113123","113321","133121",
/* 48 */"313121","211331","231131","213113","213311","213131","311123","311321",
/* 56 */"331121","312113","312311","332111","314111","221411","431111","111224",
/* 64 */"111422","121124","121421","141122","141221","112214","112412","122114",
/* 72 */"122411","142112","142211","241211","221114","413111","241112","134111",
/* 80 */"111242","121142","121241","114212","124112","124211","411212","421112",
/* 88 */"421211","212141","214121","412121","111143","111341","131141","114113",
/* 96 */"114311","411113","411311","113141","114131","311141","411131","211412",
/*104 */"211214","211232","2331112","???"};
/*
code128: see code128.tex by Petr Olsak (108 codes)
quiet_zone: size=10 (before and after code128)
num_bars=3*(start+chars[N]+crc+stop)+1
B=bar S=space char=BSBSBS (size=11), stop=BSBSBSB (size=11+2)
Width: Bar,Space=1,[2,3,4] char=11 code=11*(N+3)+2 sumB=even,sumS=odd
startA="211412"=103 startB="211214"=104 startC="211232"=105(2dec_digits)
mode/code 0..95 96 97 98 99 100 101 102 103 104 105 106
1=A x20-x5f,0-x20 F3 F2 uB mC mB F4 F1 ^A ^B ^C $
2=B x20-x7f F3 F2 uA mC F4 mA F1 ^A ^B ^C $
3=C "00"-"95" "96" "97" "98" "99" mB mA F1 ^A ^B ^C $
uA,uB: switch mode for next char, mA,mB: switch mode permanently
crc=(start+1*char1+2*char2+3*char3+...+N*charN) mod 103
$=stop="2331112"=106 (4bars, with=13) => start/end==211
return num of chars or string
size B+W even-variants odd-variants num_codes
11 = 8+3 = (1+3+4,2+2+4,2+3+3)+(1+1+1) => (6+3+3)*(1) = 12
= 6+5 = (1+1+4,1+2+3,2+2+2)+(1+1+3,1+2+2) => (3+6+1)*(3+3) = 60
= 4+7 = (1+1+2)+(1+2+4,1+3+3,2+2+3) => (3)*(6+3+3) = 36
sum = 108
*/
/* example: barcode -E -e 128c -b 1434600120000884 >a.eps */
/* example: barcode -E -e 128b -b 14Test41 >a.eps */
/* example: barcode -E -e 128raw -b 105 17 14 30 >a.eps */
char *decode_code128(int *wb, int num_bars){
int i, w, i1, i2, i3=0, i4, i5=0, crc, mode=1;
double dww, dw, err, min_err; char cc, *buf;
char *result=NULL; /* malloc and store the result */
for(w=i=0;i<2*num_bars-1;i++) w+=wb[i]; /* summ all bars and spaces */
/* test code128 characteristics, ToDo: look for correct start/stop 211 seq. */
if ((num_bars-1)%3!=0 || num_bars<10 || w<11*(num_bars-1)/3+2)
return 0;
g_debug(fprintf(stderr,"\n code128 b%d s%d b%d",wb[0],wb[1],wb[2]);)
if (3*wb[0]<4* wb[1]
|| 3*wb[0]<4* wb[2]
|| 4*wb[0]<3*(wb[1]+wb[2])
|| 3*wb[0]>4*(wb[1]+wb[2])) return 0; /* 211 */
dw=3.0*w/((num_bars-1)*11+6);
/* get enough memory for all digits in longest mode C */
buf =(char *) malloc( (num_bars-7)/3*2+1); if (!buf) return result;
result=(char *) malloc(256+(num_bars-7)/3*2+1);
dww=crc=0;
for(i4=i1=0;i1<(num_bars-1)/3;i1++) {
for(min_err=1e8,i3=Num128,i5=0;i5<Num128;i5++){ /* get best fit */
for(err=i2=0;i2<6;i2++) err+=sqr(code128[i5][i2]-'0'-wb[i1*6+i2]/dw);
if (err<min_err) { min_err=err; i3=i5; }
} dww+=min_err;
g_debug(fprintf(stderr,"\n %7s %3d err=%.3f ",code128[i3],i3,min_err);)
if(i3<Num128){ /* valid symbol */
if(i1==0){ if (i3>102 && i3<106) mode=i3-103+1; crc=i3; } /* start */
if(i1>0 && i1<(num_bars-1)/3-2){
crc+=i3*(i1); cc=0; /* first * 1 + second * 2 + third * 3 ... */
i5=((mode>3)?mode>>2:mode&3); mode&=3; /* mode can be modified now */
switch (i5) { /* mode=1..3=modeA..modeC */
case 1: if (i3>=64 && i3<96) cc=i3-64; /* modeA: x20-x5f,0-x20 */
else cc=i3+32;
if (i3==101) mode=1; /* switch to mode A */
if (i3== 99) mode=3; /* switch to mode C */
if (i3== 98) mode|=2<<2; /* shift to mode B */
break;
case 2: cc=i3+32; /* modeB: x20-x7f */
if (i3==100) mode=2; /* switch to mode B */
if (i3== 99) mode=3; /* switch to mode C */
if (i3== 98) mode|=1<<2; /* shift to mode A */
break;
case 3:
if (i3==101) mode=1; /* switch to mode A */
if (i3==100) mode=2; /* switch to mode B */
}
if (i5==3) { buf[i4]='0'+i3/10; i4++;
buf[i4]='0'+i3%10; i4++; } /* modeC: two digits */
else {
if (cc>=0x20 && i3<=0x7f) { buf[i4]=cc; i4++; } /* modeA+B: one digit */
if (cc>=0 && cc< 0x20) { buf[i4]='^'; i4++;
buf[i4]=cc+'@'; i4++; }
}
}
if(i1==(num_bars-1)/3-2){ crc=(crc+103-i3)%103; }
if(i1==(num_bars-1)/3-1){ if(i3!=106) i3=-1; } /* stop code */
mode &= 3; /* remove shift */
}
else fprintf(stderr," %s=%02d? ",buf,i5);
}
buf[i4]=0; /* end of string */
if (result)
sprintf(result,"<barcode type=\"128\" chars=\"%d\" code=\"%s\" "
"crc=\"%d\" error=\"%.3f\" />",
i4,buf,crc,dww/((num_bars-1)));
free(buf);
return result;
}
/* -------------------------------------------------------------------- UPC
EAN 13 (UPC,(1+6+1+6+1)*2bars,size=3+6*7+5+6*7+3=95)
EAN 8 (UPC,(1+4+1+4+1)*2bars,size=3+4*7+5+4*7+3=67)
UPC: (10 codes)
BSB SBSB^n SBSBS BSBS^n BSB
bsb ...... sbsbs ...... bsb
111 ...... 11111 ...... 111
num_bars=2*(2*6+3) middle=SBSBS=11111 right/left=BSB=111="101"
char: left=SBSB right=BSBS (size=7) only_dec_digits
SS+BB = (S+S) + (B+B) => BB:SS = 5:2 or 3:4
size ev+odd even + odd => variants
7 = 2 + 5 = (1+1) + (1+4,2+3) => (1)*(2+2) = 4 codes
= 4 + 3 = (1+3,2+2) + (1+3) => (2+1)*(2) = 6 codes += 10 codes
ToDo: make it more robust
- return error as mean deviation
* -------------------------------------------------------------------- */
/* example: barcode -E -e upc -b 12345678901 >a.eps # ok */
/* example: barcode -E -e ean -b 123456789012 >a.eps # ok */
#define NumUPC 20
const char *codeUPC[NumUPC+1]={ /* 0..9, first n = SBSB, last n = BSBS */
"3211","2221","2122","1411","1132", /* 0,1,2,3,4 normal (+0bit) */
"1231","1114","1312","1213","3112", /* 5,6,7,8,9 */
"1123","1222","2212","1141","2311", /* 0,1,2,3,4 mirrored (+1bit) */
"1321","4111","2131","3121","2113", /* 5,6,7,8,9 */
"????"}; /* not found */
char *decode_UPC(int *wb, int num_bars){ /* ToDo: char *dest, int len */
int i, w, i1, i2, i3, i4, i5, crc, mirrored, ean;
double err, min_err, dw, dww=0.0; char digit;
char *result=NULL, *buf=NULL; /* malloc and store the result */
for(w=i=0;i<2*num_bars-1;i++) w+=wb[i];
dw=2.0*w/((num_bars-6)*7+2*11); /* or min(wb[]) */
crc=0;
if ((num_bars)%2!=0 || num_bars<10 || w<7*(num_bars-6)/2+11
|| ((num_bars-6)/2)%2!=0) return 0; /* should be balanced */
/* check front BSB, middle SBSBS and end BSB */
dww=0;
for (i=0;i<3;i++) { dww=sqr(wb[i ]/dw-1); if (dww>0.4) return 0; }
for (i=0;i<5;i++) { dww=sqr(wb[i+ num_bars-3]/dw-1); if (dww>0.4) return 0; }
for (i=0;i<3;i++) { dww=sqr(wb[i+2*num_bars-4]/dw-1); if (dww>0.4) return 0; }
buf =(char *)malloc( (num_bars-6)/2+1); if (!buf) return result;
result=(char *)malloc(256+(num_bars-6)/2+1);
for(ean=i5=0,i1=3;i1<2*num_bars-4;i1+=4) { /* each digit (2bars+2spaces) */
if (i1==num_bars-3) { i1++; continue; } /* skip middle sync SBSBS */
for (i4=NumUPC,mirrored=0,digit='?',min_err=16e8,i2=0;i2<NumUPC;i2++) {
for (err=0,i3=0;i3<4;i3++) err+=sqr(codeUPC[i2][i3]-'0'-wb[i1+i3]/dw);
if (err<min_err) { min_err=err; i4=i2; digit='0'+i2%10; mirrored=i2/10; }
} dww+=min_err; crc+=(digit-'0')*((i5&1)?1:3); /* even*3+odd, last char is even */
buf[i5++]=digit; if (i5<7) ean=(ean<<1)|mirrored;
/* ToDo: error as deviation wb from ideal */
g_debug(fprintf(stderr,"\nDBG: UPC digit=%c mirrored=%d err=%.3f err_m=%.3f ",
digit,mirrored,min_err/4,dww/(i5*4));)
}
/* EAN has a 13th leading digit build by 3 of 6 mirorred digits */
if (ean & 0x20) ean^=0x3f; /* UPC-E mirrored 1xxxxx => 0yyyyy */
switch (ean) {
case 11: ean=1; break;
case 13: ean=2; break;
case 14: ean=3; break;
case 19: ean=4; break;
case 25: ean=5; break;
case 28: ean=6; break;
case 21: ean=7; break;
case 22: ean=8; break;
case 26: ean=9; break;
default: ean=0; /* no or invalid EAN digit or UPC-extension */
} crc+=ean*1;
/* ToDo: fix possible buffer OVL, complement crc */
buf[i5]=0;
if (result)
sprintf(result,"<barcode type=\"UPC\" chars=\"%d\" code=\"%d%s\" "
"crc=\"%d\" error=\"%.3f\" />",
i5+1,ean,buf,(10-crc%10)%10,dww/((num_bars-6)*2));
free(buf);
return result;
}
/* EAN/UPC add-on is either 2 or 5 digits. It always starts with a
* guard bar BSB, followed by ([digit + SB] * (N-1)) + digit. Digit is
* SBSB. Two digit add-on's have 7 bars, and 5 digit add ons have 16.
*/
char *decode_UPC_addon(int *wb, int num_bars){ /* ToDo: char *dest, int len */
int i, w, i1, i2, i3, i4, i5, digits=num_bars/3;
double err, min_err, dw, dww=0.0; char digit;
char *result=NULL, *buf=NULL; /* malloc and store the result */
if (num_bars!=7 && num_bars!=16)
return 0;
for(w=i=0;i<2*num_bars-1;i++) w+=wb[i];
dw=1.0*w/(digits*7+4 + (digits-1)*2);
/* check front BSB, and delineators SB */
dww=0;
for (i=0;i<2;i++) { dww=sqr(wb[i]/dw-1); if (dww>0.4) return 0; }
dww=sqr(wb[i]*0.5/dw-1); if (dww>0.4) return 0;
for (i=1;i<digits; i++) {
for (i1=0; i1<2; i1++) {
dww = sqr(wb[i*6 + 1 + i1]/dw-1);
if (dww > 0.4) return 0;
}
}
buf =(char *)malloc( digits+1); if (!buf) return result;
result=(char *)malloc(256+digits+1);
for(i5=0,i1=3;i1<2*num_bars-1;i1+=6) { /* each digit (2bars+2spaces) */
for (i4=NumUPC,digit='?',min_err=16e8,i2=0;i2<NumUPC;i2++) {
for (err=0,i3=0;i3<4;i3++) err+=sqr(codeUPC[i2][i3]-'0'-wb[i1+i3]/dw);
if (err<min_err) { min_err=err; i4=i2; digit='0'+i2%10; }
}
dww+=min_err;
buf[i5++]=digit;
/* ToDo: error as deviation wb from ideal */
g_debug(fprintf(stderr,"\nDBG: UPC digit=%c err=%.3f err_m=%.3f ",
digit, min_err/4, dww/(i5*4));)
}
buf[i5]=0;
if (result)
sprintf(result, "<barcode type=\"UPC_addon\" chars=\"%d\" code=\"%s\" "
"error=\"%.3f\" />",
i5, buf, dww/((num_bars-6)*2));
free(buf);
return result;
}
/* --------------------------------------------------------- *
* code 3 of 9, 3 thick of 9 bars
* BSBSBSBSB<S> size=7+3*aw aw=2(3), sumS/sumB=2/1?
* two widths: size=1 or size=2or3, digit_width=13(16)
* 5 bars and 4(+1) spaces per digit, last space is not used
* with 2 (or 0) thick bars, 1 (or 3) thick spaces per digit
* => 3 of 9 => max=9*8*7=504
* evenBB=(0of5)+(2of5) oddSS=(1of4)+(3of4) max=44
* ToDo: better code -...-.-.. as 046 or 083 (even,even,odd)
*/
#define Num39 (40+4) /* (3of9)=(2of5)(1of4)+(0of5)(3of4), (2of5)(.-..)=0..9 */
const char *code39= /* rearranged to BBBBBSSSS<S> (bars,spaces) */
"0..--..-.."
"1-...-.-..""2.-..-.-..""3--....-..""4..-.-.-..""5-.-...-.."
"6.--...-..""7...--.-..""8-..-..-..""9.-.-..-.."
"A-...-..-.""B.-..-..-.""C--.....-.""D..-.-..-.""E-.-....-."
"F.--....-.""G...--..-.""H-..-...-.""I.-.-...-.""J..--...-."
"K-...-...-""L.-..-...-""M--......-""N..-.-...-""O-.-.....-"
"P.--.....-""Q...--...-""R-..-....-""S.-.-....-""T..--....-"
"U-...--...""V.-..--...""W--...-...""X..-.--...""Y-.-..-..."
"Z.--..-...""-...---..."".-..-.-..."" .-.-.-...""*..--.-..."
/* (0of5)(3of4)=(.....)(3of4) store only 3of4? */
"$.....---.""/.....--.-""+.....-.--""%......---"
"?xxxxxxxxx";
/* example: barcode -E -e 39 -b 123abc | gs -sDEVICE=pnggray -r100 */
/* return index[] according to sorted values[], big first */
void sort(int *value, int *idx, int len){
int i,j;
for (j=0;j<len;j++) idx[j]=j; /* initialize */
for(i=1;i;) { /* bubble sort, len...len^2 steps */
for(i=j=0;j<len-1;j++) if(value[idx[j]]<value[idx[j+1]]) {
i=idx[j]; idx[j]=idx[j+1]; idx[j+1]=i; i=1;
}
}
}
char *decode_39(int *wb, int num_bars){ /* ToDo: char *dest, int len */
int i, w, i1, i3, i5, crc, idx[10];
double dw,dww,err; char *buf;
char *result=NULL; /* malloc and store the result */
/* check for multiple of 5 bars and minimum start+1char+stop=15 bars */
if ((num_bars)%5!=0 || num_bars<15) return 0;
for(w=i=0; i<2*num_bars-1;i++ ) w+=wb[i]; /* summ width to w */
dw=w*1.0/(16*(num_bars/5)); /* threshold = 1.5..2 */
/* whats best and most rigorosely for dw=threshold_width?
* - (1.5..2)*mean_width of every 5th space
* - (1.5..2)*summ(5bars+5spaces)/(13..16)
* - 3/4*summ(three thickest)/3
*/
dww=crc=0; /* error and checksum (not supported yet) */
#if 0 /* should we exclude any non-standard code39? */
/* check for correct start and end symbol * or NwNnWnWnN Narrow+Wide */
i=2*num_bars-2;
if (wb[ 0]>dw*2 || wb[ 1]<=dw*2 || wb[ 2]> dw*2) return 0;
if (wb[i-0]>dw*2 || wb[i-1]> dw*2 || wb[i-2]<=dw*2) return 0;
#endif
g_debug(fprintf(stderr," code39 base=%.3f chars=%2d\n ",dw,(num_bars)/5);)
buf =(char *)malloc( 1+(num_bars)/5); if (!buf) return result;
result=(char *)malloc(256+(num_bars)/5);
for(i5=i1=0;i1<2*num_bars-3;i1+=10) {
/* ToDo: looking for three widest bars/gaps */
sort(wb+i1,idx,9);
for(err=0,i3=3;i3<9;i3++) err+=sqr(wb[i1+idx[i3]]/dw-1.0); /* narrow=1, wide=2..3 */
dww+=err;
for(i3=0;i3<Num39;i3++)
if (code39[10*i3+1+(idx[0]%2)*5+idx[0]/2]=='-'
&& code39[10*i3+1+(idx[1]%2)*5+idx[1]/2]=='-'
&& code39[10*i3+1+(idx[2]%2)*5+idx[2]/2]=='-') break;
if (i5>0 && i5<num_bars/5-2) crc+=i3;
buf[i5++]=code39[10*i3];
/* ToDo: check if wee have even number of black bars within 3 biggest */
g_debug(for(i3=0;i3<9;i3++)fprintf(stderr,"%02d ",wb[i1+i3]);
fprintf(stderr," posWide=%d,%d,%d %c err=%.3f\n ",
idx[0],idx[1],idx[2],buf[i5-1],err/6);)
}
buf[i5]=0;
if (result)
sprintf(result,"<barcode type=\"39\" chars=\"%d\" code=\"%s\" "
"crc=\"%c\" error=\"%.3f\" />",
i5,buf,code39[(crc%44)*10],dww/((num_bars/5)*6));
free(buf);
return result;
}
/* code interleaved 2 of 5
B B B B B <= digit 1,3,5,...
S S S S S <= digit 2,4,6,...
1 2 4 7 0 <= weight digit=sum(bit*weight)%11
*/
const char *code25= /* is the code sorted randomly? */
"1-...-2.-..-3--...4..-.-5-.-..6.--..7...--8-..-.9.-.-.0..--.";
/* example: barcode -E -e i25 -b 123456 >a.eps */
/* ToDo: decode_i25 (low priority) */
/*
decode barcode
- check main characteristics (num bars, min+max width, etc.)
- detect code type
- the current algorithm measures the width of bars and spaces
called by detect_barcode()
*/
char *decode_barcode(struct box *bb){ /* ToDo: char *dest, int len */
int i, num_bars, yy, w, ww, dx, xx, cs=JOB->cfg.cs, *wb;
char *result=NULL; /* store the result */
yy=(bb->y0+bb->y1)/2;
w=ww=bb->x1-bb->x0+1;
num_bars = num_cross(bb->x0,bb->x1,yy,yy,bb->p,JOB->cfg.cs);
if(JOB->cfg.verbose)
fprintf(stderr,"\n# ... detect bars=%3d w=%4d",num_bars,ww);
/* store width of bars and spaces to buffer wb */
wb=(int *)malloc(2*num_bars*sizeof(int)); if(!wb) return NULL;
xx=bb->x0;
xx-=loop(bb->p,xx,yy, 8,cs,1,LE);
xx+=loop(bb->p,xx,yy,ww,cs,0,RI); /* start with a bar! */
for (i=0;i<2*num_bars;i++) {
dx=loop(bb->p,xx,yy,w,cs,1^(i&1),RI);
xx+=dx;
w-=dx;
wb[i]=dx;
} wb[2*num_bars-1]=0;
/* ToDo: what about probability? if not unique
* - add argument char *result which can be modified or not,
* - or add box2? (would reuse of this code more difficult)
*/
/* test code128 characteristics, ToDo: look for correct start/stop 211 seq. */
if ((num_bars-1)%3==0 && num_bars>=10 && ww>=11*(num_bars-1)/3+2){
if (!result) result=decode_code128(wb,num_bars);
}
/* test UPC/EAN characteristics */
if ((num_bars)%2==0 && num_bars>=8 && ww>=7*(num_bars-6)/2+11
&& ((num_bars-6)/2)%2==0){ /* should be balanced */
if (!result) result=decode_UPC(wb,num_bars);
}
/* test UPC_addon by Michael van Rooyen, often on books */
if (num_bars==7 || num_bars==16)
if (!result) result=decode_UPC_addon(wb,num_bars);
/* test code39 characteristics */
if ((num_bars)%5==0 && num_bars>14){
if (!result) result=decode_39(wb,num_bars);
}
free(wb);
return result;
}
/*
* taking the list of boxes and search for groups of bars (1D-barcodes)
*/
int detect_barcode(job_t *job)
{
int j=0, j2=0, bx0, by0, bx1, by1, bdx, bdy, bbx, rm,
x0, y0, dx, dy, cs, y, yl0, yl1, yr0, yr1;
struct box *box2, *box3;
if(JOB->cfg.verbose)
fprintf(stderr,"# barcode.c detect_barcode ");
x0=y0=0; rm=0; dx=job->src.p.x; dy=job->src.p.y; cs=JOB->cfg.cs;
for_each_data(&(JOB->res.boxlist)) {
box2 = (struct box *)list_get_current(&(JOB->res.boxlist));
/* detect width (bdx) and height (bdy) of possible bar */
/* ToDo: better check for a line */
bdx=box2->x1-box2->x0+1 /* substract correction for skewed bars */
-loop(box2->p,box2->x1,(box2->y0+box2->y1)/2,box2->x1-box2->x0,cs,0,LE)
-loop(box2->p,box2->x0,(box2->y0+box2->y1)/2,box2->x1-box2->x0,cs,0,RI);
bdy=box2->y1-box2->y0+1;
if (box2->c == PICTURE || box2->c == UNKNOWN)
if (box2->y0 >= y0 && box2->y1 <= y0 + dy /* within frame? */
&& box2->x0 >= x0 && box2->x1 <= x0 + dx
&& box2->y1 - box2->y0 > 19 /* min. length */
&& box2->y1 - box2->y0 > 8 * bdx
) { /* a bar? */
j=1; /* number of bars */
bx0=box2->x0; bx1=box2->x1; /* initial values for barcode frame */
by0=box2->y0; by1=box2->y1;
bbx=bx1-bx0+2; /* width of bar */
/* this is for scans which are not exactly horizontal */
yl0=yr0=by0; /* left and right upper bound */
yl1=yr1=by1; /* left and right lower bound */
/* --- iteratively take into account next nearest bar ---
* this is important, because bar-boxes are not in right order */
for (j2=1;j2;) {
j2=0;
/* expand a frame around the potential barcode (bx0,by0,bx1,by1) */
for_each_data(&(JOB->res.boxlist)) {
box3 = (struct box *)list_get_current(&(JOB->res.boxlist));
/* bdy=box3->y1-box3->y0+1; */
if (box2!=box3)
if (box3->c == PICTURE || box3->c == UNKNOWN)
if (box3->y0 >= y0 && box3->y1 <= y0 + dy /* within image */
&& box3->x0 >= x0 && box3->x1 <= x0 + dx
&& box3->y1 - box3->y0 > 19 /* min. length */
&& box3->y1 - box3->y0 > 4 * (bdx) /* height > 4*width2 */
&& box3->x1 - box3->x0 < 4 * (bdy) /* width < height/4 = bar */
&& (( abs(box3->y0-by0)<bdy/16+4 /* within bar-box ? */
&& abs(box3->y1-by1)<bdy/2 ) /* lower ends of UPC could be longer */
||( abs(box3->y0-yl0)<bdy/16+4 /* left side of frame */
&& abs(box3->y1-yl1)<bdy/2
&& box3->x0 <= bx0 )
||( abs(box3->y0-yr0)<bdy/16+4 /* right side of frame */
&& abs(box3->y1-yr1)<bdy/2
&& box3->x0 >= bx1 ) )
&& box3->x0 > bx0 - 12*bbx /* startspace=5...10 */
&& box3->x1 < bx1 + 12*bbx
&& box3->x0 > bx0 - bdy/2 /* dont glue two barcodes together */
&& box3->x1 < bx1 + bdy/2 /* ex: ean13a.jpg */
/* dont check bars which already within the frame twice ? */
&& ( box3->x1 > bx1 || box3->x0 < bx0 )
) { /* a bar? -> extend barcode frame only in x direction */
/* take minimum of y to have valid barcode for all y */
if (box3->x0<bx0) { bx0=box3->x0; yl0=box3->y0; yl1=box3->y1; }
if (box3->x1>bx1) { bx1=box3->x1; yr0=box3->y0; yr1=box3->y1; }
if (4*(box3->y1-box3->y0)>3*(by1-by0)) { /* carefull reduce */
if (box3->y0>by0) by0=box3->y0; /* ToDo: fix for non-horizontal */
if (box3->y1<by1) by1=box3->y1;
}
j++; /* found a near bar and count to num bars */
j2=1; /* continue searching (endless loop?) */
}
} end_for_each(&(JOB->res.boxlist));
}
/* j is the num of bars found above, some inner bars are not counted */
/* ToDo: better iterative add next nearest bars from sorted list near bars? */
if (j>5) {
char *code=0;
box2->c=PICTURE; /* BARCODE */
box2->x0=bx0; box2->y0=by0;
box2->x1=bx1; box2->y1=by1;
/* ToDo: add pointer to decoded text */
y=(box2->y0+box2->y1)/2;
if (JOB->cfg.verbose){
int nbars;
nbars=num_cross(box2->x0,box2->x1,y,y,box2->p,JOB->cfg.cs);
fprintf(stderr,"\n# barcode at %3d %3d size %3d %3d nbars %d (%d)",
bx0,by0,bx1-bx0+1,by1-by0+1,nbars,j);
if (j!=nbars)
fprintf(stderr,"\n# ... trouble: num_found_bars != num_cross");
/* this is because some far bars are detected before near bars */
}
/* transport the info to the gocr-output (development) */
/* ToDo: decode and print/store barcode bars=j */
code=decode_barcode(box2); /* ToDo: char *dest, int len */
if (!code) { /* failed */
code=(char *)malloc(128);
/* ToDo: analyze and output num_bars, width of bars etc. */
if(code) strncpy(code,"<barcode type=\"unknown\" />",128);
}
if (JOB->cfg.verbose)
fprintf(stderr,"\n# ... decoded as: %s", code);
setas(box2,code,99); /* ToDo: set a better weight */
free(code);
/* remove inner boxes, only if sure!? (ToDo: use cfg.certainty) */
for_each_data(&(JOB->res.boxlist)) {
box3 = (struct box *)list_get_current(&(JOB->res.boxlist));
/* bdy=box3->y1-box3->y0+1; */
if (box2!=box3)
if (box3->c == PICTURE || box3->c == UNKNOWN)
if ( abs(box3->y0-by0)<bdy/16+4 /* within bar-box ? */
&& abs(box3->y1-by1)<bdy/2 /* lower ends of UPC could be longer */
&& box3->x1 <= bx1
&& box3->x0 >= bx0
) {
rm++; /* count removed boxes */
list_del(&(JOB->res.boxlist),box3);
free_box(box3);
}
} end_for_each(&(JOB->res.boxlist));
if (JOB->cfg.verbose)
fprintf(stderr,"\n# ... removed boxes: %d", rm);
rm=0;
}
}
} end_for_each(&(JOB->res.boxlist));
/* recalculate averages without bars */
JOB->res.numC=JOB->res.sumX=JOB->res.sumY=j2=0;
for_each_data(&(JOB->res.boxlist)) {
j2++;
box3 = (struct box *)list_get_current(&(JOB->res.boxlist));
if (box3->c==PICTURE) continue;
JOB->res.numC++; /* count remaining boxes */
JOB->res.sumX+=box3->x1-box3->x0+1;
JOB->res.sumY+=box3->y1-box3->y0+1;
} end_for_each(&(JOB->res.boxlist));
if(JOB->cfg.verbose)
fprintf(stderr,"\n# ... boxes %d nC %d\n",
j2, JOB->res.numC);
return 0;
}
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