/****************************************************************************** **	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      2int 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----------------------------------------------------------------------------**//*---------------------------------------------------------------------------*/voidExtractorStub ()/* **	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 */