mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-24 02:59:07 +08:00
425d593ebe
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk/trunk@2 d0cd1f9f-072b-0410-8dd7-cf729c803f20
101 lines
3.9 KiB
C++
101 lines
3.9 KiB
C++
/******************************************************************************
|
|
** Filename: extract.c
|
|
** Purpose: Generic high level feature extractor routines.
|
|
** Author: Dan Johnson
|
|
** History: Sun Jan 21 09:44:08 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.
|
|
******************************************************************************/
|
|
/**----------------------------------------------------------------------------
|
|
Include Files and Type Defines
|
|
----------------------------------------------------------------------------**/
|
|
#include "extract.h"
|
|
#include "variables.h"
|
|
#include "flexfx.h"
|
|
#include "funcdefs.h"
|
|
#include "danerror.h"
|
|
|
|
typedef CHAR_FEATURES (*CF_FUNC) ();
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Private Function Prototypes
|
|
----------------------------------------------------------------------------**/
|
|
void ExtractorStub();
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Global Data Definitions and Declarations
|
|
----------------------------------------------------------------------------**/
|
|
/* tables to keep track of the different low level feature extractors */
|
|
#define NUM_FX 3
|
|
#define DEFAULT_FX 2
|
|
|
|
int CurrentFx = DEFAULT_FX;
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Public Code
|
|
----------------------------------------------------------------------------**/
|
|
/*---------------------------------------------------------------------------*/
|
|
CHAR_DESC ExtractBlobFeatures(TBLOB *Blob, LINE_STATS *LineStats) {
|
|
/*
|
|
** Parameters:
|
|
** Blob blob to extract features from
|
|
** LineStats statistics about line blob is in
|
|
** Operation: Extract features from Blob by calling the feature
|
|
** extractor which is currently being used. This routine
|
|
** simply provides a high level interface to feature
|
|
** extraction. The caller can extract any type of features
|
|
** from a blob without understanding any lower level details.
|
|
** Return: The character features extracted from Blob.
|
|
** Exceptions: none
|
|
** History: Sun Jan 21 10:07:28 1990, DSJ, Created.
|
|
*/
|
|
return (ExtractFlexFeatures (Blob, LineStats));
|
|
} /* ExtractBlobFeatures */
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
void InitExtractorVars() {
|
|
/*
|
|
** Parameters: none
|
|
** Globals: none
|
|
** Operation: Install global extractor variables into the variable
|
|
** system.
|
|
** Return: none
|
|
** Exceptions: none
|
|
** History: Sun Jan 21 10:19:59 1990, DSJ, Created.
|
|
*/
|
|
// VALUE dummy;
|
|
InitFlexFXVars();
|
|
|
|
} /* InitExtractorVars */
|
|
|
|
|
|
/**----------------------------------------------------------------------------
|
|
Private Code
|
|
----------------------------------------------------------------------------**/
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
ExtractorStub ()
|
|
/*
|
|
** Parameters: none
|
|
** Globals: none
|
|
** Operation: This routine is used to stub out feature extractors
|
|
** that are no longer used. It simply calls DoError.
|
|
** Return: none
|
|
** Exceptions: none
|
|
** History: Wed Jan 2 14:16:49 1991, DSJ, Created.
|
|
*/
|
|
#define DUMMY_ERROR 1
|
|
{
|
|
DoError (DUMMY_ERROR, "Selected feature extractor has been stubbed out!");
|
|
} /* ExtractorStub */
|