3dpcp/3rdparty/gocr-0.48/src/ocr1.c

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2012-09-16 12:33:11 +00:00
// test routines - faster to compile
#include <stdlib.h>
#include <stdio.h>
#include "pgm2asc.h"
#include "unicode.h"
#include "amiga.h"
#include "gocr.h"
// for learn_mode/analyze_mode high, with, yoffset, num of pattern_i,
// - holes (center,radius in relative coordinates) etc. => cluster analyze
// num_hole => min-volume, tolerance border
// pattern: @@ @. @@
// .@ @. ..
// regular filter for large resolutions to make edges more smooth (on boxes)
// extra-filter (only if not recognized?)
// map + same color to (#==change)
// - anti color
// . not used
// strongest neighbour pixels (3x3) => directions
// second/third run with more and more tolerance!?
/* FIXME jb: following is unused */
#if 0
struct lobj { // line-object (for fitting to near lines)
int x0,y0; // starting point (left up)
int x1,y1; // end point (right down)
int mt; // minimum thickness
int q; // quality, overlapp
};
/* FIXME jb global */
struct lobj obj1;
#endif
// that is the first draft of feature extraction
// detect main lines and bows
// seems bad implemented, looking for better algorithms (ToDo: use autotrace)
#define MAXL 10
void ocr2(pix *b,int cs){
int x1,y1,x2,y2,l,i,j,xa[MAXL],ya[MAXL],xb[MAXL],yb[MAXL],ll[MAXL];
for(i=0;i<MAXL;i++)xa[i]=ya[i]=xb[i]=yb[i]=ll[i]=0;
for(x1=0;x1<b->x;x1++) // very slowly, but simple to program
for(y1=0;y1<b->y;y1++) // brute force
for(x2=0;x2<b->x;x2++)
for(y2=y1+1;y2<b->y;y2++)
{
if( get_line2(x1,y1,x2,y2,b,cs,100)>99 )
{ // line ???
l=(x2-x1)*(x2-x1)+(y2-y1)*(y2-y1); // len
for(i=0;i<MAXL;i++)
{ // remove similar lines (same middle point) IMPROVE IT !!!!!! ???
if(
abs(x1+x2-xa[i]-xb[i])<1+b->x/2
&& abs(y1+y2-ya[i]-yb[i])<1+b->y/2
&& abs(y1-ya[i])<1+b->y/4
&& abs(x1-xa[i])<1+b->x/4
)
{
if( l>ll[i] )
{
for(j=i;j<MAXL-1;j++)
{ // shift table
xa[j]=xa[j+1];ya[j]=ya[j+1];
xb[j]=xb[j+1];yb[j]=yb[j+1];ll[j]=ll[j+1];
}
ll[MAXL-1]=0;
}
else break; // forget it if shorter
}
if( l>ll[i] ){ // insert if larger
for(j=MAXL-1;j>i;j--){ // shift table
xa[j]=xa[j-1];ya[j]=ya[j-1];
xb[j]=xb[j-1];yb[j]=yb[j-1];ll[j]=ll[j-1];
}
xa[i]=x1;ya[i]=y1;xb[i]=x2;yb[i]=y2;ll[i]=l;
break;
}
}
}
}
for(i=0;i<MAXL;i++){
printf(" %2d %2d %2d %2d %3d\n",xa[i],ya[i],xb[i],yb[i],ll[i]);
}
}