+++ /dev/null
-/*
-This is a Optical-Character-Recognition program
-Copyright (C) 2000-2006 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
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "gocr.h"
-#include "pnm.h"
-#include "pgm2asc.h"
-#include <string.h>
-#include <time.h>
-
-#define Blen 256
-
-// load boxes from database into boxlist (for faster access)
-// used as alternate engine, comparing chars with database
-int load_db(void) {
- FILE *f1;
- char s1[Blen+1],
- s2[Blen+1] = "./db/", /* ToDo: replace by constant! by configure */
- *s3;
- int i, j, ii, i2, line;
- struct box *box1;
- pix *pp;
-
- if( JOB->cfg.db_path ) strncpy(s2,JOB->cfg.db_path,Blen-1);
- i2=strlen(s2);
- if (JOB->cfg.verbose)
- fprintf(stderr, "# load database %s %s ... ",s2,JOB->cfg.db_path);
-
- strncpy(s2+i2,"db.lst",Blen-i2);s2[Blen]=0;
- f1 = fopen(s2, "r");
- if (!f1) {
- fprintf(stderr, " DB %s not found\n",s2);
- return 1;
- }
-
- line = 0; /* line counter for better error report */
- for (ii = 0; !feof(f1); ii++) {
-/* bbg: should write a better input routine */
- if (!fgets(s1, Blen, f1)) break; line++;
- j = strlen(s1);
- /* remove carriage return sequences from line */
- while (j > 0 && (s1[j - 1] == '\r' || s1[j - 1] == '\n'))
- s1[--j] = 0;
- if (!j) continue; /* skip empty line */
- if (s1[0]=='#') continue; /* skip comments (v0.44) */
- /* copy file name */
- for (i = 0; i < j && i+i2 < Blen && strchr(" \t,;",s1[i]) == 0; i++)
- s2[i2 + i] = s1[i];
- s2[i2+i]=0;
- /* skip spaces */
- for (; i < j && strchr(" \t",s1[i]) != 0; i++);
- /* by now: read pix, fill box, goto next ??? */
- pp = (pix *)malloc(sizeof(pix));
- if( !pp ) fprintf(stderr,"malloc error in load_db pix\n");
-
- //readpgm(s2, pp, 0 * JOB->cfg.verbose);
- fprintf(stderr, "Can't call readpgm()\n");
-
- box1 = (struct box *)malloc_box(NULL);
- if(!box1) fprintf(stderr,"malloc error in load_db box1\n");
- box1->x0 = 0;
- box1->x1 = pp->x-1; // white border 1 pixel width
- box1->y0 = 0;
- box1->y1 = pp->y-1;
- box1->x = 1;
- box1->y = 1;
- box1->dots = 0;
- box1->c = 0;
- box1->modifier = 0; /* ToDo: obsolete */
- box1->tas[0]=NULL;
- box1->tac[0]=0;
- box1->wac[0]=100; /* really 100% sure? */
- box1->num_ac=1;
- if (s1[i]=='"'){ /* parse a string */
- j=strrchr(s1+i+1,'"')-(s1+i+1); /* we only look for first and last "" */
- if (j>=1) {
- s3=(char *)malloc(j+1);
- if (!s3) fprintf (stderr, "malloc error in load_db s3\n");
- if (s3) {
- memcpy(s3,s1+i+1,j);
- s3[j]=0;
- box1->tas[0]=s3;
- // fprintf(stderr,"\nstring=%s",s3);
- }
- } else { fprintf(stderr,"load_db: string parse error L%d\n",line); }
- } else {
- box1->tac[0] = box1->c = s1[i]; /* try to interpret as ASCII */
- /* we can live without hexcode in future if we use UTF8-strings */
- s3=s1+i;
- j=strtol( s1+i, &s3, 16); /* try to read 4 to 8 digit hex unicode */
- /* if its an hexcode, ASCII interpretation is overwritten */
- if( j && i+3<=Blen && s3-s1-i>3 ) box1->tac[0] = box1->c = j;
- // fprintf(stderr,"\nhexcode=%04x=%04x %d",(int)j,(int)box1->c,s3-s1-i);
- }
- box1->num = 0;
- box1->line = -1;
- box1->m1 = 0; /* ToDo: should be given too in the database! */
- box1->m2 = 0;
- box1->m3 = 0;
- box1->m4 = 0;
- box1->p = pp;
- list_app(&JOB->tmp.dblist, box1); // append to list
-#if 0
- out_x(box1);
-#endif
- }
- fclose(f1);
- if (JOB->cfg.verbose)
- fprintf(stderr, " %d chars loaded\n", ii);
- return 0;
-}
-
-// expand database from box/boxlist name=db_$utime.pbm
-// this is added in version v0.3.3
-int store_db(struct box *box1) {
- FILE *f1;
- char s2[Blen+1] = "./db/", s3[Blen+1];
- int i2, dx, dy;
- pix b; /* temporary mini page */
-
- if( JOB->cfg.db_path ) strncpy(s2,JOB->cfg.db_path,Blen-1);
- i2=strlen(s2);
-
- /* name generation can cause problems, if called twice within a second */
- if (box1->num_ac && box1->tas[0])
- sprintf(s3,"db_%04x_%lu.pbm", (unsigned int)box1->tas[0][0],
- (unsigned long)time(NULL));
- else
- sprintf(s3,"db_%04x_%lu.pbm", (unsigned int)box1->c,
- (unsigned long)time(NULL));
- /* ToDo: the file name may be not unique */
- strncpy(s2+i2,"db.lst",Blen-i2);s2[Blen]=0;
- f1 = fopen(s2, "a");
- if (!f1) {
- fprintf(stderr, " could not access %s\n",s2);
- return 1;
- }
- strncpy(s2+i2,s3,strlen(s3)); s2[i2+strlen(s3)]=0;
- /* store image and infos about the char */
- /* ToDo: store the vector list instead of the pixelarray */
-
- if (JOB->cfg.verbose)
- fprintf(stderr, "store_db: add file %s to database\n#",s3);
- dx=box1->x1-box1->x0+1;
- dy=box1->y1-box1->y0+1;
- b.p = (unsigned char *) malloc( dx * dy );
- if( !b.p ){
- fprintf( stderr, "\nFATAL: malloc failed, skip store_db" );
- return 2;
- }
- if (copybox(box1->p, box1->x0, box1->y0, dx, dy, &b, dx * dy))
- return -1;
-
- //writepbm(s2,&b); /* What is to do on error? */
-
- free(b.p);
-
- /* store the database line */
- /* some infos about box1->m1,..,m4 should added (base line, high etc.) */
- if (box1->num_ac && box1->tas[0]) {
- fprintf(f1, "%s \"%s\"\n",s3,box1->tas[0]);
- /* ToDo: what if tas contains '"'? */
- } else {
- if( (box1->c >= '0' && box1->c <= '9')
- || (box1->c >= 'A' && box1->c <= 'Z')
- || (box1->c >= 'a' && box1->c <= 'z') )
- fprintf(f1, "%s %c\n",s3,(char)box1->c);
- else {
- if (((box1->c)>>16)>>16)
- fprintf(f1, "%s %08x\n",s3,(unsigned int)box1->c);
- else
- fprintf(f1, "%s %04x\n",s3,(unsigned int)box1->c);
- }
- }
- fclose(f1);
- return 0;
-}
-
-/* function is only for user prompt on console to identify chars
- it prints out a part of pixmap b at point x0,y0 to stderr
- using dots .,; if no pixel, and @xoO for pixels
- */
-void out_env(struct box *px ){
- int x0,y0,x1,y1,dx,dy,x,y,x2,y2,yy0,tx,ty,i,cs;
- char c1, c2; pix *b;
- cs=JOB->cfg.cs;
- yy0=px->y0;
- { /* overwrite rest of arguments */
- b=px->p;
- x0=px->x0; x1=px->x1; dx=x1-x0+1;
- y0=px->y0; y1=px->y1; dy=y1-y0+1;
- y0-=2; y1+=2;
- if (px->m4 && y0>px->m1) y0=px->m1;
- if (px->m4 && y1<px->m4) y1=px->m4;
- if (x1-x0+1<52) { x0-=10; x1+=10; } /* fragment? expand frame */
- if (x1-x0+1<52) { x0-=10; x1+=10; } /* fragment? expand frame */
- if (x1-x0+1<62) { x0-=5; x1+=5; }
- if (y1-y0+1<10) { y0-= 4; y1+= 4; } /* fragment? */
- if (x0<0) x0=0; if (x1>=b->x) x1=b->x-1;
- if (y0<0) y0=0; if (y1>=b->y) y1=b->y-1;
- dx=x1-x0+1;
- dy=y1-y0+1; yy0=y0;
- fprintf(stderr,"\n# show box + environment");
- fprintf(stderr,"\n# show box x= %4d %4d d= %3d %3d r= %d %d",
- px->x0, px->y0, px->x1 - px->x0 + 1, px->y1 - px->y0 + 1,
- px->x - px->x0, px->y - px->y0);
- if (px->num_ac){ /* output table of chars and its probabilities */
- fprintf(stderr,"\n# list box char: ");
- for(i=0;i<px->num_ac && i<NumAlt;i++)
- /* output the (xml-)string (picture position, barcodes, glyphs, ...) */
- if (px->tas[i])
- fprintf(stderr," %s(%d)", px->tas[i] ,px->wac[i]);
- else
- fprintf(stderr," %s(%d)",decode(px->tac[i],ASCII),px->wac[i]);
- }
- fprintf(stderr,"\n");
- if (px->dots && px->m2 && px->m1<y0) { yy0=px->m1; dy=px->y1-yy0+1; }
- }
- tx=dx/80+1;
- ty=dy/40+1; // step, usually 1, but greater on large maps
- fprintf(stderr,"# show pattern x= %4d %4d d= %3d %3d t= %d %d\n",
- x0,y0,dx,dy,tx,ty);
- if (dx>0)
- for(y=yy0;y<yy0+dy;y+=ty) { /* reduce the output to max 78x40 */
-
- /* image is the boxframe + environment in the original bitmap */
- for(x=x0;x<x0+dx;x+=tx){ /* by merging sub-pixels */
- c1='.';
- for(y2=y;y2<y+ty && y2<y0+dy;y2++) /* sub-pixels */
- for(x2=x;x2<x+tx && x2<x0+dx;x2++)
- { if((getpixel(b,x2,y2)<cs)) c1='#'; }
- // show pixels outside the box thinner/weaker
- if (x+tx-1 < px->x0 || x > px->x1
- || y+ty-1 < px->y0 || y > px->y1) c1=((c1=='#')?'O':',');
- fprintf(stderr,"%c", c1 );
- }
-
- c1=c2=' ';
- /* mark lines with < */
- if (px) if (y==px->m1 || y==px->m2 || y==px->m3 || y==px->m4) c1='<';
- if (y==px->y0 || y==px->y1) c2='-'; /* boxmarks */
- fprintf(stderr,"%c%c\n",c1,c2);
- }
-}
-
-
-/*
-// second variant, for database (with slightly other behaviour)
-// new variant
-// look at the environment of the pixel too (contrast etc.)
-// detailed analysis only of diff pixels!
-//
-// 100% * distance, 0 is best fit
-// = similarity of 2 chars for recognition of noisy chars
-// weigth of pixels with only one same neighbour set to 0
-// look at contours too!
- ToDo: especially on small boxes distance should only be 0 if
- characters are 100% identical!
-*/
-// #define DEBUG 2
-int distance2( pix *p1, struct box *box1,
- pix *p2, struct box *box2, int cs){
- int rc=0,x,y,v1,v2,i1,i2,rgood=0,rbad=0,
- x1,y1,x2,y2,dx,dy,dx1,dy1,dx2,dy2,tx,ty;
-#if DEBUG == 2
- if(JOB->cfg.verbose)
- fprintf(stderr," DEBUG: distance2\n");
-#endif
- x1=box1->x0;y1=box1->y0;x2=box2->x0;y2=box2->y0;
- dx1=box1->x1-box1->x0+1; dx2=box2->x1-box2->x0+1; dx=((dx1>dx2)?dx1:dx2);dx=dx1;
- dy1=box1->y1-box1->y0+1; dy2=box2->y1-box2->y0+1; dy=((dy1>dy2)?dy1:dy2);dy=dy1;
- if(abs(dx1-dx2)>1+dx/16 || abs(dy1-dy2)>1+dy/16) rbad++; // how to weight?
- // compare relations to baseline and upper line
- if(box1->m4>0 && box2->m4>0){ // used ???
- if(2*box1->y1>box1->m3+box1->m4 && 2*box2->y1<box2->m3+box2->m4) rbad+=128;
- if(2*box1->y0>box1->m1+box1->m2 && 2*box2->y0<box2->m1+box2->m2) rbad+=128;
- }
- tx=dx/16; if(dx<17)tx=1; // raster
- ty=dy/32; if(dy<33)ty=1;
- // compare pixels
- for( y=0;y<dy;y+=ty )
- for( x=0;x<dx;x+=tx ) { // try global shift too ???
- v1=((getpixel(p1,x1+x*dx1/dx,y1+y*dy1/dy)<cs)?1:0); i1=8; // better gray?
- v2=((getpixel(p2,x2+x*dx2/dx,y2+y*dy2/dy)<cs)?1:0); i2=8; // better gray?
- if(v1==v2) { rgood+=16; continue; } // all things are right!
- // what about different pixel???
- // test overlapp of surounding pixels ???
- v1=1; rbad+=4;
- v1=-1;
- for(i1=-1;i1<2;i1++)
- for(i2=-1;i2<2;i2++)if(i1!=0 || i2!=0){
- if( ((getpixel(p1,x1+x*dx1/dx+i1*(1+dx1/32),y1+y*dy1/dy+i2*(1+dy1/32))<cs)?1:0)
- !=((getpixel(p2,x2+x*dx2/dx+i1*(1+dx2/32),y2+y*dy2/dy+i2*(1+dy2/32))<cs)?1:0) ) v1++;
- }
- if(v1>0)
- rbad+=16*v1;
- }
- if(rgood+rbad) rc= 100*rbad/(rgood+rbad); else rc=99;
- /* if width/high is not correct add badness */
- rc += ( abs(dx1*dy2-dx2*dy1) * 10 ) / (dy1*dy2);
- if (rc>100) rc=100;
- if(/* rc<10 && */ JOB->cfg.verbose /* &1024 */){
-#if DEBUG == 2
- fprintf(stderr," distance2 rc=%d rgood=%d rbad=%d\n",rc,rgood,rbad);
-// out_b(NULL,p1,box1->x0,box1->y0,box1->x1-box1->x0+1,
-// box1->y1-box1->y0+1,cs);
-// out_b(NULL,p2,box2->x0,box2->y0,box2->x1-box2->x0+1,
-// box2->y1-box2->y0+1,cs);
- out_x(box1);
- out_x(box2);
-#endif
- }
- return rc;
-}
-
-wchar_t ocr_db(struct box *box1) {
- int dd = 1000, dist = 1000;
- wchar_t c = UNKNOWN;
- char buf[200];
- Box *box2, *box3;
-
- if (!list_empty(&JOB->tmp.dblist)){
- box3 = (Box *)list_get_header(&JOB->tmp.dblist);
- if(JOB->cfg.verbose)
- fprintf(stderr,"\n#DEBUG: ocr_db (%d,%d) ",box1->x0, box1->y0);
-
- for_each_data(&JOB->tmp.dblist) {
- box2 = (Box *)list_get_current(&JOB->tmp.dblist);
- /* do preselect!!! distance() slowly */
- dd = distance2( box2->p, box2, box1->p, box1, JOB->cfg.cs);
- if (dd <= dist) { /* new best fit */
- dist = dd;
- box3 = box2; /* box3 is a pointer and not copied box2 */
-
- if (dist<100 && 100-dist > JOB->cfg.certainty) {
- /* some deviation of the pattern is tolerated */
- int i, wa;
- for (i=0;i<box3->num_ac;i++) {
- wa = (100-dist)*box3->wac[i]/100; /* weight *= (100-dist) */
- if (box3->tas[i]) setas(box1,box3->tas[i],wa);
- else setac(box1,box3->tac[i],wa);
- }
- if (box3->num_ac) c=box3->tac[0]; /* 0 for strings (!UNKNOWN) */
- if (JOB->cfg.verbose)
- fprintf(stderr, " dist=%4d c= %c 0x%02x %s wc= %3d", dist,
- ((box3->c>32 && box3->c<127) ? (char) box3->c : '.'),
- (int)box3->c, ((box3->tas[0])?box3->tas[0]:""), box3->wac[0]);
- }
- if (dd<=0 && ((box3->num_ac && box3->tas[0]) || box3->c >= 128
- || !strchr ("l1|I0O", box3->c)))
- break; /* speedup if found */
- }
- } end_for_each(&JOB->tmp.dblist);
-
- }
-
- if( (JOB->cfg.mode&128) != 0 && c == UNKNOWN ) { /* prompt the user */
- /* should the output go to stderr or special pipe??? */
- int utf8_ok=0; /* trigger this flag if input is ok */
- int i, endchar; /* index */
- out_env(box1); /* old: out_x(box1); */
- fprintf(stderr,"The above pattern was not recognized.\n"
- "Enter UTF8 char or string for above pattern. Leave empty if unsure.\n"
- "Press RET at the end (ALT+RET to store into RAM only) : "
- ); /* ToDo: empty + alt-return (0x1b 0x0a) for help? ^a for skip all */
- /* UTF-8 (man 7 utf-8):
- * 7bit = 0xxxxxxx (0000-007F)
- * 11bit = 110xxxxx 10xxxxxx (0080-07FF)
- * 16bit = 1110xxxx 10xxxxxx 10xxxxxx (0800-FFFF)
- * 21bit = 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
- * 26bit = 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
- * 31bit = 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
- */
- buf[0]=0;
- /* shift/ctrl/altgr-enter acts like enter or ^j or ^m,
- * alt-enter returns 0x1b 0x0a and returns from fgets()
- * ^d (EOF) returns (nil) from fgets()
- * x+(2*)ctrl-d returns from fgets() without returning a 0x0a
- * if not UTF-input-mode, we are in trouble?
- * ^a=0x01, ^b=0x02, ^e=05, ..., ToDo: meaning of no-input or <=space
- */
- fgets(buf,200,stdin); /* including \n=0x0a */
- dd=strlen(buf);
- /* output hexcode if verbose set */
- if (JOB->cfg.verbose) {
- fprintf(stderr, "\n# fgets [%d]:", dd);
- for(i=0; i<dd; i++)
- fprintf(stderr, " %02x", (unsigned)((unsigned char)buf[i]));
- fprintf(stderr, "\n#");
- }
- /* we dont accept chars which could destroy database file */
- for (i=0; i<dd; i++) if (buf[i]<32) break;
- endchar=buf[i]; /* last char is 0x0a (ret) 0x00 (EOF) or 0x1b (alt+ret) */
- if (endchar==0x01) { i=0;JOB->cfg.mode&=~128; } /* skip all */
- buf[dd=i]=0; /* replace final 0x0a or other special codes */
- if (dd==1 && !(buf[0]&128)) { c=buf[0]; utf8_ok=1; } /* single char */
- if (dd>1 && dd<7) { /* try to decode single wide char (utf8) */
- int u0, u1; /* define UTF8-start sequences, u0=0bits u1=1bits */
- u0= 1<<(7-dd); /* compute start byte from UTF8-length */
- u1=255&~((1<<(8-dd))-1);
- for (i=1;i<dd;i++) if ((buf[i]&0xc0)!=0x80) break; /* 10xxxxxx */
- if (i==dd && (buf[0]&(u0|u1))==u1) { utf8_ok=1;
- c=buf[0]&(u0-1); /* 11..0x.. */
- for (i=1;i<dd;i++) { c<<=6; c|=buf[i]&0x3F; } /* 10xxxxxx */
- }
- }
- if (dd>0){ /* ToDo: skip space and tab too? */
- if (utf8_ok==1) { setac(box1, c, 100); } /* store single wchar */
- if (utf8_ok==0) { /* store a string of chars (UTF8-string) */
- c='_'; /* what should we do with c? probably a bad idea? */
- setas(box1, buf, 100);
- }
- /* decide between
- * 0) just help gocr to find the results and (dont remember, 0x01)
- * 1) help and remember in the same run (store to memory, 0x1b)
- * 2) expand the database (dont store ugly chars to the database!)
- */
- if (endchar!=0x01){ /* ^a before hit return */
- /* is there a reason to dont store to memory? */
- list_app(&JOB->tmp.dblist, box1); /* append to list for 1+2 */
- }
- if (endchar!=0x01 && endchar!=0x1b){
- store_db(box1); /* store to disk for 2 */
- }
- if (JOB->cfg.verbose)
- fprintf(stderr, " got char= %c 16bit= 0x%04x string= \"%s\"\n",
- ((c>32 && c<127)?(char)c:'.'), (int)c, buf);
- }
- }
-
- return c;
-}
git.asbjorn.biz / swftools.git / blobdiff