3dpcp/.svn/pristine/42/42b31a2ebf7d29923cda83ed3b3ed98a628ebb9c.svn-base
2012-09-16 14:33:11 +02:00

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#ifndef _OCR0_H
#define _OCR0_H
#include "pgm2asc.h"
/* ----------------------------------------------------------------
- functions with thousand of lines make the compilation very slow
therefore the ocr0-function is splitted in subfunctions
- shared data used often in ocr0-subroutines are stored
in ocr0_shared structure.
* ------------------------------------------------------------ */
typedef struct ocr0_shared { /* shared variables and properties */
struct box *box1; /* box in whole image */
pix *bp; /* extracted temporarly box, cleaned */
int cs; /* global threshold value (gray level) */
/* ToDo: or MACROS: X0 = box1->x0 */
int x0, x1, y0, y1; /* box coordinates related to box1 */
int dx, dy; /* size of box */
int hchar, gchar; /* relation to m1..m4 */
int aa[4][4]; /* corner points, see xX (x,y,dist^2,vector_idx) v0.41 */
holes_t holes; /* list of holes (max MAX_HOLES) */
} ocr0_shared_t;
/* tests for umlaut */
int testumlaut(struct box *box1, int cs, int m, wchar_t *modifier);
/* detect chars */
wchar_t ocr0(struct box *box1, pix *b, int cs);
/* detect numbers */
wchar_t ocr0n(ocr0_shared_t *sdata);
static inline int sq(int x) { return x*x; } /* square */
/*
* go from vector j1 to vector j2 and measure maximum deviation of
* the steps from the line connecting j1 and j2
* return the squared maximum distance
* in units of the box size times 1024
*/
int line_deviation( struct box *box1, int j1, int j2 );
/*
* search vectors between j1 and j2 for nearest point a to point r
* example:
*
* r-> $$...$$ $ - mark vectors
* @@$..@@ @ - black pixels
* @@$..@@ . - white pixels
* @@@@.$@
* a-> @@$@$@@
* @$.@@@@
* @@..$@@
* @@..$@@
* j1 --> $$...$$ <-- j2
*
* ToDo: vector aa[5] = {rx,ry,x,y,d^2,idx} statt rx,ry?
* j1 and j2 must be in the same frame
* return aa?
*/
int nearest_frame_vector( struct box *box1, int j1, int j2, int rx, int ry);
#endif