typedef struct DatabaseNode {
char *str;
int nlinks, alinks;
- unsigned match:1, defined:1, endsword:1;
+ unsigned match:1, defined:1, endsword:1, local:1;
DatabaseLink *links;
} DatabaseNode;
-static const char *context_names[]= {
- "Lower",
- "Upper",
- "Digit"
+typedef struct {
+ OcrReader *rd;
+ OcrCellType ct;
+ int w;
+ Pixcol *cols;
+ int x;
+ unsigned ctxmap;
+} FindCharArgs;
+typedef struct {
+ DatabaseNode *match;
+ int rx;
+} FindCharResults;
+
+#define FOR_EACH_CONTEXT(EACH) \
+ EACH(Word) \
+ EACH(Lower) \
+ EACH(Upper) \
+ EACH(Digit)
+
+#define FEC_ENUM(Context) ct_##Context,
+#define FEC_BIT(Context) ctf_##Context = 1 << ct_##Context,
+enum {
+ FOR_EACH_CONTEXT(FEC_ENUM)
+ FOR_EACH_CONTEXT(FEC_BIT)
};
+
+#define FEC_STRINGS(Context) #Context,
+static const char *context_names[]= { FOR_EACH_CONTEXT(FEC_STRINGS) };
+
struct OcrCellTypeInfo {
/* bitmaps of indices into context_names: */
unsigned initial, nextword, midword;
int space_spaces;
const char *name;
+ int (*findchar_select)(const FindCharArgs *fca,
+ const FindCharResults results[]);
};
-const struct OcrCellTypeInfo ocr_celltype_number= {
- 4,4,4,
- .space_spaces= 5,
- .name= "number"
-};
-const struct OcrCellTypeInfo ocr_celltype_text= {
- .initial=2, /* Uppercase */
- .nextword=3, /* Either */
- .midword=1, /* Lower only */
- .space_spaces= 4,
- .name= "text"
-};
-
#define NCONTEXTS (sizeof(context_names)/sizeof(context_names[0]))
cleardb_node(n->links[i].then);
}
-static void readdb1(OcrReader *rd, const char *which);
+static void readdb1(OcrReader *rd, const char *which, int local);
static void readdb(OcrReader *rd) {
int ctxi;
for (ctxi=0; ctxi<NCONTEXTS; ctxi++)
cleardb_node(&rd->contexts[ctxi]);
- readdb1(rd, "master");
- readdb1(rd, "local");
+ readdb1(rd, "master", 0);
+ readdb1(rd, "local", 1);
}
-static void readdb1(OcrReader *rd, const char *which) {
+static void readdb1(OcrReader *rd, const char *which, int local) {
int nchrs;
DatabaseNode *current, *additional;
char chrs[100];
current->str= 0;
current->defined= 1;
current->match= 0;
+ current->local= local;
if (nchrs) {
current->str= mmalloc(nchrs+1);
Pixcol pv;
FILE *resolver= resolve_start();
- if (!resolver)
+ if (!resolver || !(o_flags & ff_editcharset))
fatal("OCR failed - unrecognised characters or ligatures.\n"
"Character set database needs to be updated or augmented.\n"
"See README.charset.\n");
for (i=0, s=rd->results; i<rd->nresults; i++, s++) {
if (!strcmp(s->s," ")) continue;
fprintf(resolver," %d %d ",s->l,s->r);
- cu_pr_ctxmap(resolver,s->ctxmap);
+ cu_pr_ctxmap(resolver, 1u << s->match);
+ fprintf(resolver," ");
+ cu_pr_ctxmap(resolver, s->ctxmap);
fprintf(resolver," ");
for (p=s->s; (c= *p); p++) {
if (c=='\\') fprintf(resolver,"\\%c",c);
}
static void add_result(OcrReader *rd, const char *s, int l, int r,
- unsigned ctxmap) {
+ int match, unsigned ctxmap) {
if (rd->nresults >= rd->aresults) {
rd->aresults++; rd->aresults<<=1;
rd->results= mrealloc(rd->results, sizeof(*rd->results)*rd->aresults);
rd->results[rd->nresults].s= s;
rd->results[rd->nresults].l= l;
rd->results[rd->nresults].r= r;
+ rd->results[rd->nresults].match= match;
rd->results[rd->nresults].ctxmap= ctxmap;
rd->nresults++;
}
+static DatabaseNode *findchar_1ctx(const FindCharArgs *fca,
+ DatabaseNode *start, int *matchx_r) {
+ DatabaseNode *current= start;
+ DatabaseNode *bestmatch= 0;
+ int i;
+ int x= fca->x;
+
+ for (;;) {
+ debug_flush();
+ debugf(" | x=%d",x);
+ if (x > fca->w) break;
+ Pixcol cv= fca->cols[x];
+ debugf(" cv=%"PSPIXCOL(PRIx),cv);
+ for (i=0; i<current->nlinks; i++)
+ if (current->links[i].col == cv)
+ goto found;
+ /* not found */
+ debugf(" ?");
+ break;
+
+ found:
+ current= current->links[i].then;
+ if (current->match) {
+ debugf(" \"%s\"%s",current->str,current->endsword?"_":"");
+ bestmatch= current;
+ *matchx_r= x;
+ } else {
+ debugf(" ...");
+ }
+
+ x++;
+ }
+ return bestmatch;
+}
+
+static DatabaseNode *findchar(const FindCharArgs *fca,
+ int *match_rx, int *match_rctxi) {
+ FindCharResults results[NCONTEXTS];
+ int ctxi, match=-1, nmatches=0;
+
+ debugf("OCR lx=%d ct_state=%x ", fca->x, fca->ctxmap);
+ for (ctxi=0; ctxi<NCONTEXTS; ctxi++) {
+ results[ctxi].match= 0;
+ if (!(fca->ctxmap & (1u << ctxi))) continue;
+ debugf(" || %s",context_names[ctxi]);
+
+ results[ctxi].match= findchar_1ctx(fca, &fca->rd->contexts[ctxi],
+ &results[ctxi].rx);
+ if (!results[ctxi].match) continue;
+
+ match= ctxi;
+ nmatches++;
+ }
+ if (nmatches==1) {
+ debugf(" unique");
+ } else {
+ debugf(" ambiguous");
+ match= !fca->ct->findchar_select ? -1 :
+ fca->ct->findchar_select(fca,results);
+ debugf(" resolved %s", match<0 ? "<none>" : context_names[match]);
+ }
+ if (match<0)
+ return 0;
+
+ *match_rx= results[match].rx;
+ if (match_rctxi) *match_rctxi= match;
+ return results[match].match;
+}
+
+static int findchar_select_text(const FindCharArgs *fca,
+ const FindCharResults results[]) {
+
+ dbassert(! results[ct_Digit].match ); /* digits are supposedly unambiguous */
+
+ switch (fca->ctxmap) {
+
+#define RETURN_IF_LONGER(this,that) do{ \
+ if (results[ct_##this].rx > results[ct_##that].rx) \
+ return ct_##this; \
+ }while(0)
+
+ case ctf_Digit | ctf_Upper | ctf_Lower | ctf_Word:
+ /* Start of word. Prefer Word match; failing that, take the longest */
+ if (results[ct_Word].match) return ct_Word;
+ RETURN_IF_LONGER(Lower,Upper);
+ RETURN_IF_LONGER(Upper,Lower);
+ break;
+
+ case ctf_Digit | ctf_Upper | ctf_Lower:
+ /* Mid-word. Prefer longer match; failing that, match lower. */
+ RETURN_IF_LONGER(Upper,Lower);
+ return ct_Lower;
+ }
+
+ /* oh well */
+ return -1;
+}
+
+const struct OcrCellTypeInfo ocr_celltype_number= {
+ ctf_Digit, ctf_Digit, ctf_Digit,
+ .space_spaces= 5,
+ .name= "number",
+ .findchar_select= 0
+};
+const struct OcrCellTypeInfo ocr_celltype_text= {
+ .initial= ctf_Digit | ctf_Upper,
+ .nextword= ctf_Digit | ctf_Upper | ctf_Lower | ctf_Word,
+ .midword= ctf_Digit | ctf_Upper | ctf_Lower,
+ .space_spaces= 4,
+ .name= "text",
+ .findchar_select= findchar_select_text
+};
+
+
const char *ocr_celltype_name(OcrCellType ct) { return ct->name; }
OcrResultGlyph *ocr(OcrReader *rd, OcrCellType ct, int w, Pixcol cols[]) {
int nspaces;
- unsigned ctxmap;
- int ctxi, i, x;
+ int x;
+
+ FindCharArgs fca;
+ fca.rd= rd;
+ fca.ct= ct;
+ fca.w= w;
+ fca.cols= cols;
+ fca.x= -1;
restart:
nspaces=- w;
- ctxmap= ct->initial;
+ fca.ctxmap= ct->initial;
rd->nresults=0;
debugf("OCR h=%d w=%d",rd->h,w);
for (x=0; x<w; x++) debugf(" %"PSPIXCOL(PRIx),cols[x]);
x++;
if (nspaces == ct->space_spaces) {
debugf("OCR x=%x nspaces=%d space\n",x,nspaces);
- ctxmap= ct->nextword;
+ fca.ctxmap= ct->nextword;
}
continue;
}
/* something here, so we need to add the spaces */
if (nspaces >= ct->space_spaces)
- add_result(rd," ",x-nspaces,x+1,0);
+ add_result(rd," ",x-nspaces,x+1,-1,0);
nspaces=0;
- /* find character */
- int lx=x;
+ fca.x= x;
- DatabaseNode *uniquematch= 0;
- int uniquematch_rx=-1;
+ int match_rx=-1;
+ int match_ctxi=-1;
+ DatabaseNode *match= findchar(&fca, &match_rx, &match_ctxi);
- debugf("OCR lx=%d ctxmap=%x ",lx,ctxmap);
-
- for (ctxi=0; ctxi<NCONTEXTS; ctxi++) {
- DatabaseNode *current= &rd->contexts[ctxi];;
- DatabaseNode *bestmatch= 0;
- int bestmatch_rx=-1;
-
- x= lx;
- if (!(ctxmap & (1u << ctxi))) continue;
- debugf(" || %s",context_names[ctxi]);
-
- for (;;) {
- debug_flush();
- debugf(" | x=%d",x);
- if (x>w) break;
- Pixcol cv= cols[x];
- debugf(" cv=%"PSPIXCOL(PRIx),cv);
- for (i=0; i<current->nlinks; i++)
- if (current->links[i].col == cv)
- goto found;
- /* not found */
- debugf(" ?");
- break;
-
- found:
- current= current->links[i].then;
- if (current->match) {
- debugf(" \"%s\"%s",current->str,current->endsword?"_":"");
- bestmatch= current;
- bestmatch_rx= x;
- } else {
- debugf(" ...");
- }
-
- x++;
- }
-
- if (bestmatch) {
- if (uniquematch && strcmp(bestmatch->str, uniquematch->str)) {
- debugf( " ambiguous");
- uniquematch= 0;
- break;
- }
- uniquematch= bestmatch;
- uniquematch_rx= bestmatch_rx;
- }
- }
-
- if (uniquematch) {
+ if (match) {
debugf(" || YES");
- add_result(rd, uniquematch->str, lx, uniquematch_rx, ctxmap);
- x= uniquematch_rx+1;
- if (uniquematch->match) ctxmap= ct->midword;
+ add_result(rd, match->str, x, match_rx, match_ctxi, fca.ctxmap);
+ x= match_rx+1;
+ if (match->match) fca.ctxmap= ct->midword;
else debugf(" (empty)");
- if (uniquematch->endsword) {
+ if (match->endsword) {
nspaces= ct->space_spaces;
debugf("_");
- ctxmap= ct->nextword;
+ fca.ctxmap= ct->nextword;
}
debugf("\n");
} else {
int rx;
debugf(" || UNKNOWN");
- for (rx=lx; rx<w && cols[rx]; rx++);
- debugf(" x=%d ctxmap=%x %d..%d\n",x, ctxmap, lx,rx);
+ for (rx=x; rx<w && cols[rx]; rx++);
+ debugf(" x=%d ctxmap=%x %d..%d\n",x, fca.ctxmap, x,rx);
debug_flush();
- callout_unknown(rd, w,cols, lx,rx-1, ctxmap);
+ callout_unknown(rd, w,cols, x,rx-1, fca.ctxmap);
goto restart;
}
+
}
- add_result(rd, 0,-1,-1,0);
+ add_result(rd, 0,-1,-1,-1,0);
debugf("OCR finished %d glyphs\n",rd->nresults);
debug_flush();
return rd->results;
readdb(rd);
return rd;
}
+
+/*---------- character set dump ----------*/
+
+static void show_recurse(const DatabaseNode *t, int *count,
+ const DatabaseNode **store_ary) {
+ if (t->defined) {
+ if (store_ary) store_ary[*count]= t;
+ (*count)++;
+ }
+ int l;
+ for (l=0; l<t->nlinks; l++)
+ show_recurse(t->links[l].then, count,store_ary);
+}
+
+static int show_char_compar(const void *av, const void *bv) {
+ const DatabaseNode *const *ap= av; const DatabaseNode *a= *ap;
+ const DatabaseNode *const *bp= bv; const DatabaseNode *b= *bp;
+ return strcmp(a->str, b->str) ?:
+ ((int)a->match - (int)b->match) ?:
+ ((int)a->endsword - (int)b->endsword) ?:
+ ((int)a->local - (int)b->local) ?:
+ 0;
+}
+
+void ocr_showcharsets(void) {
+ DIR *d;
+ struct dirent *de;
+ char found[32];
+ pcre *fnpat;
+ int matchvec[10];
+ char hbuf[10];
+ const char *pcre_err;
+ int pcre_erroffset;
+
+ memset(found,0,sizeof(found));
+
+ fnpat= pcre_compile("\\#(?:master|local)\\-char([1-9]\\d{0,2})\\#\\.txt$",
+ PCRE_ANCHORED|PCRE_DOLLAR_ENDONLY,
+ &pcre_err,&pcre_erroffset, 0);
+ debugf("pcre_compile %p %s\n",fnpat,pcre_err);
+ assert(fnpat);
+
+ sysassert( d= opendir(get_vardir()) );
+ for (;;) {
+ errno=0; de= readdir(d); if (!de) break;
+
+ int rer= pcre_exec(fnpat,0, de->d_name,strlen(de->d_name), 0,0,
+ matchvec,ARRAYSIZE(matchvec));
+ debugf("pcre_exec `%s' => %d\n", de->d_name,rer);
+
+ if (rer==PCRE_ERROR_NOMATCH || rer==PCRE_ERROR_BADUTF8) continue;
+ assert(rer==2);
+
+ rer= pcre_copy_substring(de->d_name,matchvec,rer, 1, hbuf,sizeof(hbuf));
+ debugf("pcre_copy_substring => %d\n", rer);
+ assert(rer>0);
+
+ int h= atoi(hbuf);
+ if (h >= ARRAYSIZE(found)) continue;
+
+ found[h]= 1;
+ }
+
+ int h;
+ for (h=0; h<ARRAYSIZE(found); h++) {
+ if (!found[h]) continue;
+
+ OcrReader *rd= ocr_init(h); /* we leak this but never mind */
+ progress("");
+
+ int ctxi;
+ for (ctxi=0; ctxi<NCONTEXTS; ctxi++) {
+ int nchars= 0;
+ show_recurse(&rd->contexts[ctxi], &nchars, 0);
+ const DatabaseNode **chars= mmalloc(sizeof(*chars) * nchars);
+ int chari= 0;
+ show_recurse(&rd->contexts[ctxi], &chari, chars);
+ assert(chari==nchars);
+ qsort(chars, nchars, sizeof(*chars), show_char_compar);
+
+ int local;
+ for (local=0; local<2; local++) {
+ printf("%2d %-6s %-6s ", h, context_names[ctxi],
+ local?"local":"master");
+ for (chari=0; chari<nchars; chari++) {
+ const DatabaseNode *t= chars[chari];
+ static const char accept[]=
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "0123456789" "'!&-+.,>";
+
+ if (t->local != local) continue;
+
+ if (!t->match)
+ printf(" [nomatch]");
+ else if (!t->endsword && strspn(t->str, accept) == strlen(t->str))
+ printf(" %s",t->str);
+ else {
+ printf(" \"");
+ char *p= t->str;
+ int c;
+ while ((c=*p++)) {
+ if (c=='"' || c=='\\') printf("\\%c",c);
+ else if (c>=' ' && c<=126) putchar(c);
+ else printf("\\x%02x", (unsigned char)c);
+ }
+ if (t->endsword) putchar(' ');
+ putchar('"');
+ }
+ }
+ putchar('\n');
+ }
+ free(chars);
+ }
+ }
+}
~yarrgweb / ypp-sc-tools.db-test.git / blobdiff