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git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@293 d0cd1f9f-072b-0410-8dd7-cf729c803f20
114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
/******************************************************************************
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** Filename: matchdefs.h
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** Purpose: Generic interface definitions for feature matchers.
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** Author: Dan Johnson
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** History: Fri Jan 19 09:21:25 1990, DSJ, Created.
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**
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** (c) Copyright Hewlett-Packard Company, 1988.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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******************************************************************************/
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#ifndef MATCHDEFS_H
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#define MATCHDEFS_H
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/**----------------------------------------------------------------------------
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Include Files and Type Defines
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----------------------------------------------------------------------------**/
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#include "general.h"
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#include <stdio.h>
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#include "unichar.h"
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/* define the maximum number of classes defined for any matcher
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and the maximum class id for any matcher. This must be changed
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if more different classes need to be classified */
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#define MAX_NUM_CLASSES 8192
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#define MAX_CLASS_ID (MAX_NUM_CLASSES - 1)
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/* a CLASS_ID is the ascii character to be associated with a class */
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typedef UNICHAR_ID CLASS_ID;
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#define NO_CLASS (0)
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/* a PROTO_ID is the index of a prototype within it's class. Valid proto
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id's are 0 to N-1 where N is the number of prototypes that make up the
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class. */
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typedef inT16 PROTO_ID;
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#define NO_PROTO (-1)
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/* FEATURE_ID is the index of a feature within a character description
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The feature id ranges from 0 to N-1 where N is the number
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of features in a character description. */
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typedef uinT8 FEATURE_ID;
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#define NO_FEATURE 255
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#define NOISE_FEATURE 254
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#define MISSING_PROTO 254
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#define MAX_NUM_FEAT 40
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#define MAX_FEATURE_ID 250
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/* a RATING is the match rating returned by a classifier.
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Higher is better. */
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typedef FLOAT32 RATING;
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/* a CERTAINTY is an indication of the degree of confidence of the
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classifier. Higher is better. 0 means the match is as good as the
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mean of the matches seen in training. -1 means the match was one
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standard deviation worse than the training matches, etc. */
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typedef FLOAT32 CERTAINTY;
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/* define a data structure to hold a single match result */
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typedef struct
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{
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CLASS_ID Class;
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RATING Rating;
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CERTAINTY Certainty;
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}
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MATCH_RESULT;
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/* define a data structure for holding an array of match results */
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typedef MATCH_RESULT SORTED_CLASSES[MAX_CLASS_ID + 1];
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/**----------------------------------------------------------------------------
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Public Function Prototypes
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----------------------------------------------------------------------------**/
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/*
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all feature matchers that are to be used with the high level
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classifier must support the following interface. The names will, of
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course, be unique for each different matcher. Note also that
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FEATURE_STRUCT is a data structure that is defined specifically for
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each feature extractor/matcher pair.
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*/
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/* misc test functions for proto id's and feature id's */
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#define IsValidFeature(Fid) ((Fid) < MAX_FEATURE_ID)
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#define IsValidProto(Pid) ((Pid) >= 0)
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#if defined(__STDC__) || defined(__cplusplus)
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# define _ARGS(s) s
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#else
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# define _ARGS(s) ()
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#endif
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/* matchdefs.c */
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int CompareMatchResults
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_ARGS ((MATCH_RESULT * Result1, MATCH_RESULT * Result2));
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void PrintMatchResult _ARGS ((FILE * File, MATCH_RESULT * MatchResult));
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void PrintMatchResults
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_ARGS ((FILE * File, int N, MATCH_RESULT MatchResults[]));
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#undef _ARGS
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/**----------------------------------------------------------------------------
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Global Data Definitions and Declarations
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----------------------------------------------------------------------------**/
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#endif
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