--- /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
+
+ sometimes I have written comments in german language, sorry for that
+
+ - look for ??? for preliminary code
+*/
+
+/* General headerfile with gocr-definitions */
+
+#ifndef __GOCR_H__
+#define __GOCR_H__
+
+#include "pnm.h"
+#include "unicode.h"
+#include "list.h"
+#include <stddef.h>
+#ifdef HAVE_GETTIMEOFDAY
+#include <sys/time.h>
+#endif
+
+/*
+ * wchar_t should always exist (ANSI), but WCHAR.H is sometimes missing
+ * USE_UNICODE should be removed or replaced by HAVE_WCHAR_H in future
+ */
+#ifdef HAVE_WCHAR_H
+#define USE_UNICODE 1
+#endif
+
+/* extern "C"{ */
+/* ------------------------ feature extraction ----------------- */
+#define AT 7 /* mark */
+#define M1 1 /* mark */
+enum direction {
+ UP=1, DO, RI, LE
+};
+typedef enum direction DIRECTION;
+#define ST 7 /* stop */
+/* ------------------------------------------------------------- */
+/* detect maximas in of line overlapps (return in %) and line koord */
+#define HOR 1 /* horizontal */
+#define VER 2 /* vertikal */
+#define RIS 3 /* rising=steigend */
+#define FAL 4 /* falling=fallend */
+
+#define MAXlines 1024
+
+/* ToDo: if we have a tree instead of a list, a line could be a node object */
+struct tlines {
+ int num;
+ int dx, dy; /* direction of text lines (straight/skew) */
+ int m1[MAXlines], /* start of line = upper bound of 'A' */
+ m2[MAXlines], /* upper bound of 'e' */
+ m3[MAXlines], /* lower bound of 'e' = baseline */
+ m4[MAXlines]; /* stop of line = lower bound of 'q' */
+ int x0[MAXlines],
+ x1[MAXlines]; /* left and right border */
+ int wt[MAXlines]; /* weight, how sure thats correct in percent, v0.41 */
+ int pitch[MAXlines]; /* word pitch (later per box?), v0.41 */
+ int mono[MAXlines]; /* spacing type, 0=proportional, 1=monospaced */
+};
+
+#define NumAlt 10 /* maximal number of alternative chars (table length) */
+#define MaxNumFrames 8 /* maximum number of frames per char/box */
+#define MaxFrameVectors 128 /* maximum vectors per frame (*8=1KB/box) */
+/* ToDo: use only malloc_box(),free_box(),copybox() for creation, destroy etc.
+ * adding reference_counter to avoid pointer pointing to freed box
+ */
+struct box { /* this structure should contain all pixel infos of a letter */
+ int x0,x1,y0,y1,x,y,dots; /* xmin,xmax,ymin,ymax,reference-pixel,i-dots */
+ int num_boxes, /* 1 "abc", 2 "!i?", 3 "ä" (composed objects) 0.41 */
+ num_subboxes; /* 1 for "abdegopqADOPQR", 2 for "B" (holes) 0.41 */
+ wchar_t c; /* detected char (same as tac[0], obsolete?) */
+ wchar_t modifier; /* default=0, see compose() in unicode.c */
+ int num; /* same number = same char */
+ int line; /* line number (points to struct tlines lines) */
+ int m1,m2,m3,m4; /* m2 = upper boundary, m3 = baseline */
+ /* planed: sizeof hole_1, hole_2, certainty (run1=100%,run2=90%,etc.) */
+ pix *p; /* pointer to pixmap (v0.2.5) */
+ /* tac, wac is used together with setac() to manage very similar chars */
+ int num_ac; /* length of table (alternative chars), default=0 */
+ wchar_t tac[NumAlt]; /* alternative chars, only used by setac(),getac() */
+ int wac[NumAlt]; /* weight of alternative chars */
+ char *tas[NumAlt]; /* alternative UTF8-strings or XML codes if tac[]=0 */
+ /* replacing old obj */
+ /* ToDo: (*obj)[NumAlt] + olen[NumAlt] ??? */
+ /* ToDo: bitmap for possible Picture|Object|Char ??? */
+/* char *obj; */ /* pointer to text-object ... -> replaced by tas[] */
+ /* ... (melted chars, barcode, picture coords, ...) */
+ /* must be freed before box is freed! */
+ /* do _not_ copy only the pointer to object */
+ /* --------------------------------------------------------
+ * extension since v0.41 js05, Store frame vectors,
+ * which is a table of vectors sourrounding the char and its
+ * inner white holes. The advantage is the independence from
+ * resolution, handling of holes, overlap and rotation.
+ * --------------------------------------------------------- */
+ int num_frames; /* number of frames: 1 for cfhklmnrstuvwxyz */
+ /* 2 for abdegijopq */
+ int frame_vol[MaxNumFrames]; /* volume inside frame +/- (black/white) */
+ int frame_per[MaxNumFrames]; /* periphery, summed length of vectors */
+ int num_frame_vectors[MaxNumFrames]; /* index to next frame */
+ /* biggest frame should be stored first (outer frame) */
+ /* biggest has the maximum pair distance */
+ /* num vector loops */
+ int frame_vector[MaxFrameVectors][2]; /* may be 16*int=fixpoint_number */
+
+};
+typedef struct box Box;
+
+/* true if the coordination pair (a,b) is outside the image p */
+#define outbounds(p, a, b) (a < 0 || b < 0 || a >= (p)->x || b >= (p)->y)
+
+/* ToDo: this structure seems to be obsolete, remove it */
+typedef struct path {
+ int start; /* color at the beginning of the path, (0=white, 1=black) */
+ int *x; /* x coordinates of transitions */
+ int *y; /* y coordinates of transitions */
+ int num; /* current number of entries in x or y */
+ int max; /* maximum number of entries in x or y */
+ /* (if more values need to be stored, the arrays are enlarged) */
+} path_t;
+
+/* job_t contains all information needed for an OCR task */
+typedef struct job_s {
+ struct { /* source data */
+ char *fname; /* input filename; default value: "-" */
+ pix p; /* source pixel data, pixelmap 8bit gray */
+ } src;
+ struct { /* temporary stuff, e.g. buffers */
+#ifdef HAVE_GETTIMEOFDAY
+ struct timeval init_time; /* starting time of this job */
+#endif
+ pix ppo; /* pixmap for visual debugging output, obsolete */
+
+ /* sometimes recognition function is called again and again, if result was 0
+ n_run tells the pixel function to return alternative results */
+ int n_run; /* num of run, if run_2 critical pattern get other results */
+ /* used for 2nd try, pixel uses slower filter function etc. */
+ List dblist; /* list of boxes loaded from the character database */
+ } tmp;
+ struct { /* results */
+ List boxlist; /* store every object in a box, which contains */
+ /* the characteristics of the object (see struct box) */
+ List linelist; /* recognized text lines after recognition */
+
+ struct tlines lines; /* used to access to line-data (statistics) */
+ /* here the positions (frames) of lines are */
+ /* stored for further use */
+ int avX,avY; /* average X,Y (avX=sumX/numC) */
+ int sumX,sumY,numC; /* sum of all X,Y; num chars */
+ } res;
+ struct { /* configuration */
+ int cs; /* critical grey value (pixel<cs => black pixel) */
+ /* range: 0..255, 0 means autodetection */
+ int spc; /* spacewidth/dots (0 = autodetect); default value: 0 */
+ int mode; /* operation modes; default value: 0 */
+ /* operation mode (see --help) */
+ int dust_size; /* dust size; default value: 10 */
+ int only_numbers; /* numbers only; default value: 0 */
+ int verbose; /* verbose mode; default value: 0 */
+ /* verbose option (see --help) */
+ FORMAT out_format; /* output format; default value: ISO8859_1*/
+ char *lc; /* debuglist of chars (_ = not recognized chars) */
+ /* default value: "_" */
+ char *db_path; /* pathname for database; default value: NULL */
+ char *cfilter; /* char filter; default value: NULL, ex: "A-Za-z" */
+ /* limit of certainty where chars are accepted as identified */
+ int certainty; /* in units of 100 (percent); 0..100; default 95 */
+ } cfg;
+} job_t;
+
+/* initialze job structure */
+void job_init(job_t *job);
+
+/* free job structure */
+void job_free(job_t *job);
+
+/*FIXME jb: remove JOB; */
+extern job_t *JOB;
+
+/* calculate the overlapp of the line (0-1) with black points
+ * by rekursiv bisection
+ * (evl. Fehlertoleranz mit pixel in Umgebung dx,dy suchen) (umschaltbar) ???
+ * MidPoint Line Algorithm (Bresenham) Foley: ComputerGraphics better?
+ * will be replaced by vector functions
+ */
+
+/* gerade y=dy/dx*x+b, implizit d=F(x,y)=dy*x-dx*y+b*dx=0
+ * incrementell y(i+1)=m*(x(i)+1)+b, F(x+1,y+1)=f(F(x,y)) */
+int get_line(int x0, int y0, int x1, int y1, pix *p, int cs, int ret);
+int get_line2(int x0, int y0, int x1, int y1, pix *p, int cs, int ret);
+
+/* look for white 0x02 or black 0x01 dots (0x03 = white+black) */
+char get_bw(int x0, int x1, int y0, int y1,
+ pix *p, int cs,int mask);
+
+/* look for black crossing a line x0,y0,x1,y1
+ * follow line and count crossings ([white]-black-transitions)
+ */
+int num_cross(int x0, int x1, int y0, int y1,
+ pix *p, int cs);
+
+/* memory allocation with error checking */
+void *xrealloc(void *ptr, size_t size);
+
+/* follow a line x0,y0,x1,y1 recording locations of transitions,
+ * return count of transitions
+ */
+int follow_path(int x0, int x1, int y0, int y1, pix *p, int cs, path_t *path);
+
+/* -------------------------------------------------------------
+ * mark edge-points
+ * - first move forward until b/w-edge
+ * - more than 2 pixel?
+ * - loop around
+ * - if forward pixel : go up, rotate right
+ * - if forward no pixel : rotate left
+ * - stop if found first 2 pixel in same order
+ * mit an rechter-Wand-entlang-gehen strategie
+ * --------------------------------------------------------------
+ * turmite game: inp: start-x,y, regel r_black=UP,r_white=RIght until border
+ * out: last-position
+ * Zaehle dabei, Schritte,Sackgassen,xmax,ymax,ro-,ru-,lo-,lu-Ecken
+ * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ *
+ * is this the right place for declaration?
+ */
+void turmite(pix *p, int *x, int *y,
+ int x0, int x1, int y0, int y1, int cs, int rw, int rb);
+
+/* test if points are connected via t-pixel (rekursiv!) */
+int joined(pix *p, int x0, int y0, int x1, int y1, int cs);
+
+/* move from x,y to direction r until pixel or l steps
+ * return number of steps
+ */
+int loop(pix *p, int x, int y, int l, int cs, int col, DIRECTION r);
+
+#define MAX_HOLES 3
+typedef struct list_holes {
+ int num; /* numbers of holes, initialize with 0 */
+ struct hole_s {
+ int size,x,y,x0,y0,x1,y1; /* size, start point, outer rectangle */
+ } hole[MAX_HOLES];
+} holes_t;
+
+/* look for white holes surrounded by black points
+ * at moment white point with black in all four directions
+ */
+int num_hole(int x0, int x1, int y0, int y1, pix *p, int cs, holes_t *holes);
+
+/* count for black nonconnected objects --- used for i,auml,ouml,etc. */
+int num_obj(int x0, int x1, int y0, int y1, pix *p, int cs);
+
+int distance( pix *p1, struct box *box1, /* box-frame */
+ pix *p2, struct box *box2, int cs);
+
+/* call the OCR engine ;) */
+/* char whatletter(struct box *box1,int cs); */
+
+/* declared in pixel.c */
+/* getpixel() was pixel() but it may collide with netpnm pixel declaration */
+int getpixel(pix *p, int x, int y);
+int marked(pix *p, int x, int y);
+void put(pix * p, int x, int y, int ia, int io);
+
+/* } */ /* extern C */
+#endif /* __GOCR_H__ */
git.asbjorn.biz / swftools.git / blobdiff