--- /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