mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-05 02:47:00 +08:00
4523ce9f7d
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@526 d0cd1f9f-072b-0410-8dd7-cf729c803f20
135 lines
5.0 KiB
C
135 lines
5.0 KiB
C
/* -*-C-*-
|
|
********************************************************************************
|
|
*
|
|
* File: outlines.h (Formerly outlines.h)
|
|
* Description: Combinatorial Splitter
|
|
* Author: Mark Seaman, OCR Technology
|
|
* Created: Thu Jul 27 11:27:55 1989
|
|
* Modified: Wed May 15 17:28:47 1991 (Mark Seaman) marks@hpgrlt
|
|
* Language: C
|
|
* Package: N/A
|
|
* Status: Experimental (Do Not Distribute)
|
|
*
|
|
* (c) Copyright 1989, Hewlett-Packard Company.
|
|
** Licensed under the Apache License, Version 2.0 (the "License");
|
|
** you may not use this file except in compliance with the License.
|
|
** You may obtain a copy of the License at
|
|
** http://www.apache.org/licenses/LICENSE-2.0
|
|
** Unless required by applicable law or agreed to in writing, software
|
|
** distributed under the License is distributed on an "AS IS" BASIS,
|
|
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
** See the License for the specific language governing permissions and
|
|
** limitations under the License.
|
|
*
|
|
*********************************************************************************/
|
|
#ifndef OUTLINES_H
|
|
#define OUTLINES_H
|
|
|
|
#include "blobs.h"
|
|
#include "chop.h"
|
|
|
|
#include <math.h>
|
|
|
|
/*----------------------------------------------------------------------
|
|
C o n s t a n t s
|
|
----------------------------------------------------------------------*/
|
|
#define LARGE_DISTANCE 100000 /* Used for closest dist */
|
|
#define MIN_BLOB_SIZE 10 /* Big units */
|
|
#define MAX_ASPECT_RATIO 2.5 /* Widest character */
|
|
|
|
/*----------------------------------------------------------------------
|
|
M a c r o s
|
|
----------------------------------------------------------------------*/
|
|
/**********************************************************************
|
|
* same_point
|
|
*
|
|
* Return TRUE if the point values are the same. The parameters must
|
|
* be of type POINT.
|
|
**********************************************************************/
|
|
#define same_point(p1,p2) \
|
|
((abs (p1.x - p2.x) < chop_same_distance) && \
|
|
(abs (p1.y - p2.y) < chop_same_distance))
|
|
|
|
/**********************************************************************
|
|
* dist_square
|
|
*
|
|
* Return the square of the distance between these two points. The
|
|
* parameters must be of type POINT.
|
|
**********************************************************************/
|
|
|
|
#define dist_square(p1,p2) \
|
|
((p2.x - p1.x) * (p2.x - p1.x) + \
|
|
(p2.y - p1.y) * (p2.y - p1.y))
|
|
|
|
/**********************************************************************
|
|
* closest
|
|
*
|
|
* The expression provides the EDGEPT that is closest to the point in
|
|
* question. All three parameters must be of type EDGEPT.
|
|
**********************************************************************/
|
|
|
|
#define closest(test_p,p1,p2) \
|
|
(p1 ? \
|
|
(p2 ? \
|
|
((dist_square (test_p->pos, p1->pos) < \
|
|
dist_square (test_p->pos, p2->pos)) ? \
|
|
p1 : \
|
|
p2) : \
|
|
p1) : \
|
|
p2)
|
|
|
|
/**********************************************************************
|
|
* edgept_dist
|
|
*
|
|
* Return the distance (squared) between the two edge points.
|
|
**********************************************************************/
|
|
|
|
#define edgept_dist(p1,p2) \
|
|
(dist_square ((p1)->pos, (p2)->pos))
|
|
|
|
/**********************************************************************
|
|
* is_exterior_point
|
|
*
|
|
* Return TRUE if the point supplied is an exterior projection from the
|
|
* outline.
|
|
**********************************************************************/
|
|
|
|
#define is_exterior_point(edge,point) \
|
|
(same_point (edge->prev->pos, point->pos) || \
|
|
same_point (edge->next->pos, point->pos) || \
|
|
(angle_change (edge->prev, edge, edge->next) - \
|
|
angle_change (edge->prev, edge, point) > 20))
|
|
|
|
/**********************************************************************
|
|
* is_equal
|
|
*
|
|
* Return TRUE if the POINTs are equal.
|
|
**********************************************************************/
|
|
|
|
#define is_equal(p1,p2) \
|
|
(((p1).x == (p2).x) && ((p1).y == (p2).y))
|
|
|
|
/**********************************************************************
|
|
* is_on_line
|
|
*
|
|
* Return TRUE if the point is on the line segment between the two end
|
|
* points. The two end points are included as part of the line. The
|
|
* parameters must be of type POINT.
|
|
**********************************************************************/
|
|
|
|
#define is_on_line(p,p0,p1) \
|
|
(within_range ((p).x, (p0).x, (p1).x) && \
|
|
within_range ((p).y, (p0).y, (p1).y))
|
|
|
|
/**********************************************************************
|
|
* within_range
|
|
*
|
|
* Return TRUE if the first number is in between the second two numbers.
|
|
* Return FALSE otherwise.
|
|
**********************************************************************/
|
|
|
|
#define within_range(x,x0,x1) \
|
|
(((x0 <= x) && (x <= x1)) || ((x1 <= x) && (x <= x0)))
|
|
|
|
#endif
|