mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-15 01:24:54 +08:00
125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/******************************************************************************
|
|
** Filename: mfoutline.h
|
|
** Purpose: Interface spec for fx outline structures
|
|
** Author: Dan Johnson
|
|
** History: Thu May 17 08:55:32 1990, DSJ, Created.
|
|
**
|
|
** (c) Copyright Hewlett-Packard Company, 1988.
|
|
** 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 MFOUTLINE_H
|
|
#define MFOUTLINE_H
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Include Files and Type Defines
|
|
----------------------------------------------------------------------------**/
|
|
#include "blobs.h"
|
|
#include "host.h"
|
|
#include "oldlist.h"
|
|
#include "fpoint.h"
|
|
#include "params.h"
|
|
|
|
#define NORMAL_X_HEIGHT (0.5)
|
|
#define NORMAL_BASELINE (0.0)
|
|
|
|
typedef LIST MFOUTLINE;
|
|
|
|
typedef enum {
|
|
north, south, east, west, northeast, northwest, southeast, southwest
|
|
} DIRECTION;
|
|
|
|
typedef struct {
|
|
FPOINT Point;
|
|
FLOAT32 Slope;
|
|
unsigned Padding:20;
|
|
BOOL8 Hidden:TRUE;
|
|
BOOL8 ExtremityMark:TRUE;
|
|
DIRECTION Direction:4;
|
|
DIRECTION PreviousDirection:4;
|
|
} MFEDGEPT;
|
|
|
|
typedef enum {
|
|
outer, hole
|
|
} OUTLINETYPE;
|
|
|
|
typedef enum {
|
|
baseline, character
|
|
} NORM_METHOD;
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Macros
|
|
----------------------------------------------------------------------------**/
|
|
#define AverageOf(A,B) (((A) + (B)) / 2)
|
|
|
|
/* macro for computing the scale factor to use to normalize characters */
|
|
#define MF_SCALE_FACTOR (NORMAL_X_HEIGHT / kBlnXHeight)
|
|
|
|
/* macros for manipulating micro-feature outlines */
|
|
#define DegenerateOutline(O) (((O) == NIL_LIST) || ((O) == list_rest(O)))
|
|
#define PointAt(O) ((MFEDGEPT *) first_node (O))
|
|
#define NextPointAfter(E) (list_rest (E))
|
|
#define MakeOutlineCircular(O) (set_rest (last (O), (O)))
|
|
|
|
/* macros for manipulating micro-feature outline edge points */
|
|
#define ClearMark(P) ((P)->ExtremityMark = FALSE)
|
|
#define MarkPoint(P) ((P)->ExtremityMark = TRUE)
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Public Function Prototypes
|
|
----------------------------------------------------------------------------**/
|
|
void ComputeBlobCenter(TBLOB *Blob, TPOINT *BlobCenter);
|
|
|
|
LIST ConvertBlob(TBLOB *Blob);
|
|
|
|
MFOUTLINE ConvertOutline(TESSLINE *Outline);
|
|
|
|
LIST ConvertOutlines(TESSLINE *Outline,
|
|
LIST ConvertedOutlines,
|
|
OUTLINETYPE OutlineType);
|
|
|
|
void FilterEdgeNoise(MFOUTLINE Outline, FLOAT32 NoiseSegmentLength);
|
|
|
|
void FindDirectionChanges(MFOUTLINE Outline,
|
|
FLOAT32 MinSlope,
|
|
FLOAT32 MaxSlope);
|
|
|
|
void FreeMFOutline(void *agr); //MFOUTLINE Outline);
|
|
|
|
void FreeOutlines(LIST Outlines);
|
|
|
|
void MarkDirectionChanges(MFOUTLINE Outline);
|
|
|
|
MFEDGEPT *NewEdgePoint();
|
|
|
|
MFOUTLINE NextExtremity(MFOUTLINE EdgePoint);
|
|
|
|
void NormalizeOutline(MFOUTLINE Outline,
|
|
FLOAT32 XOrigin);
|
|
|
|
/*----------------------------------------------------------------------------
|
|
Private Function Prototypes
|
|
-----------------------------------------------------------------------------*/
|
|
void ChangeDirection(MFOUTLINE Start, MFOUTLINE End, DIRECTION Direction);
|
|
|
|
// Normalizes the Outline in-place using cn_denorm's local transformation,
|
|
// then converts from the integer feature range [0,255] to the clusterer
|
|
// feature range of [-0.5, 0.5].
|
|
void CharNormalizeOutline(MFOUTLINE Outline, const DENORM& cn_denorm);
|
|
|
|
void ComputeDirection(MFEDGEPT *Start,
|
|
MFEDGEPT *Finish,
|
|
FLOAT32 MinSlope,
|
|
FLOAT32 MaxSlope);
|
|
|
|
MFOUTLINE NextDirectionChange(MFOUTLINE EdgePoint);
|
|
|
|
#endif
|