Tesseract 3.01
/data/source/tesseract-ocr/classify/featdefs.h
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00001 /******************************************************************************
00002  **     Filename:    featdefs.h
00003  **     Purpose:     Definitions of currently defined feature types.
00004  **     Author:      Dan Johnson
00005  **     History:     Mon May 21 08:28:01 1990, DSJ, Created.
00006  **
00007  **     (c) Copyright Hewlett-Packard Company, 1988.
00008  ** Licensed under the Apache License, Version 2.0 (the "License");
00009  ** you may not use this file except in compliance with the License.
00010  ** You may obtain a copy of the License at
00011  ** http://www.apache.org/licenses/LICENSE-2.0
00012  ** Unless required by applicable law or agreed to in writing, software
00013  ** distributed under the License is distributed on an "AS IS" BASIS,
00014  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015  ** See the License for the specific language governing permissions and
00016  ** limitations under the License.
00017  ******************************************************************************/
00018 #ifndef   FEATDEFS_H
00019 #define   FEATDEFS_H
00020 
00024 #include "ocrfeatures.h"
00025 
00026 /* Enumerate the different types of features currently defined. */
00027 #define NUM_FEATURE_TYPES 4
00028 
00029 /* define error traps which can be triggered by this module.*/
00030 #define ILLEGAL_SHORT_NAME  2000
00031 
00032 /* A character is described by multiple sets of extracted features.  Each
00033   set contains a number of features of a particular type, for example, a
00034   set of bays, or a set of closures, or a set of microfeatures.  Each
00035   feature consists of a number of parameters.  All features within a
00036   feature set contain the same number of parameters.*/
00037 
00038 struct CHAR_DESC_STRUCT {
00039   uinT32 NumFeatureSets;
00040   FEATURE_SET FeatureSets[NUM_FEATURE_TYPES];
00041 };
00042 typedef CHAR_DESC_STRUCT *CHAR_DESC;
00043 
00044 struct FEATURE_DEFS_STRUCT {
00045   uinT32 NumFeatureTypes;
00046   const FEATURE_DESC_STRUCT* FeatureDesc[NUM_FEATURE_TYPES];
00047   const FEATURE_EXT_STRUCT* FeatureExtractors[NUM_FEATURE_TYPES];
00048   int FeatureEnabled[NUM_FEATURE_TYPES];
00049 };
00050 typedef FEATURE_DEFS_STRUCT *FEATURE_DEFS;
00051 
00052 /*----------------------------------------------------------------------
00053     Generic functions for manipulating character descriptions
00054 ----------------------------------------------------------------------*/
00055 void InitFeatureDefs(FEATURE_DEFS_STRUCT *featuredefs);
00056 
00057 void FreeCharDescription(CHAR_DESC CharDesc);
00058 
00059 CHAR_DESC NewCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs);
00060 
00061 void WriteCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs,
00062                           FILE *File, CHAR_DESC CharDesc);
00063 
00064 CHAR_DESC ReadCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs,
00065                               FILE *File);
00066 
00067 int ShortNameToFeatureType(const FEATURE_DEFS_STRUCT &FeatureDefs,
00068                            const char *ShortName);
00069 
00073 extern const FEATURE_DESC_STRUCT MicroFeatureDesc;
00074 extern const FEATURE_DESC_STRUCT PicoFeatDesc;
00075 extern const FEATURE_DESC_STRUCT CharNormDesc;
00076 extern const FEATURE_DESC_STRUCT OutlineFeatDesc;
00077 #endif
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