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