mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-29 03:48:10 +08:00
a18816f839
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@441 d0cd1f9f-072b-0410-8dd7-cf729c803f20
258 lines
8.4 KiB
C++
258 lines
8.4 KiB
C++
/******************************************************************************
|
|
** Filename: featdefs.c
|
|
** Purpose: Definitions of currently defined feature types.
|
|
** Author: Dan Johnson
|
|
** History: Mon May 21 10:26:21 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 "featdefs.h"
|
|
#include "emalloc.h"
|
|
#include "danerror.h"
|
|
#include "scanutils.h"
|
|
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
/** define errors triggered by this module */
|
|
#define ILLEGAL_NUM_SETS 3001
|
|
|
|
#define PICO_FEATURE_LENGTH 0.05
|
|
#define MAX_OUTLINE_FEATURES 100
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
Global Data Definitions and Declarations
|
|
-----------------------------------------------------------------------------*/
|
|
/* define all of the parameters for the MicroFeature type*/
|
|
StartParamDesc (MicroFeatureParams)
|
|
DefineParam (0, 0, -0.5, 0.5)
|
|
DefineParam (0, 0, -0.25, 0.75)
|
|
DefineParam (0, 1, 0.0, 1.0)
|
|
DefineParam (1, 0, 0.0, 1.0)
|
|
DefineParam (0, 1, -0.5, 0.5)
|
|
DefineParam (0, 1, -0.5, 0.5)
|
|
EndParamDesc
|
|
/* now define the feature type itself (see features.h for info about each
|
|
parameter).*/
|
|
DefineFeature (MicroFeatureDesc, 5, 1, 4, 50, "Micro", "mf", MicroFeatureParams)
|
|
|
|
// define all of the parameters for the PicoFeature type
|
|
/* define knob that can be used to adjust pico-feature length */
|
|
FLOAT32 PicoFeatureLength = PICO_FEATURE_LENGTH;
|
|
StartParamDesc (PicoFeatParams)
|
|
DefineParam (0, 0, -0.25, 0.75)
|
|
DefineParam (1, 0, 0.0, 1.0)
|
|
DefineParam (0, 0, -0.5, 0.5)
|
|
EndParamDesc
|
|
/* now define the feature type itself (see features.h for info about each
|
|
parameter).*/
|
|
DefineFeature (PicoFeatDesc, 2, 1, 1, MAX_UINT8, "Pico", "pf", PicoFeatParams)
|
|
|
|
/* define all of the parameters for the NormFeat type*/
|
|
StartParamDesc (CharNormParams)
|
|
DefineParam (0, 0, -0.25, 0.75)
|
|
DefineParam (0, 1, 0.0, 1.0)
|
|
DefineParam (0, 1, 0.0, 1.0)
|
|
DefineParam (0, 1, 0.0, 1.0)
|
|
EndParamDesc
|
|
/* now define the feature type itself (see features.h for info about each
|
|
parameter).*/
|
|
DefineFeature (CharNormDesc, 4, 0, 1, 1, "CharNorm", "cn", CharNormParams)
|
|
|
|
// define all of the parameters for the OutlineFeature type
|
|
StartParamDesc (OutlineFeatParams)
|
|
DefineParam (0, 0, -0.5, 0.5)
|
|
DefineParam (0, 0, -0.25, 0.75)
|
|
DefineParam (0, 0, 0.0, 1.0)
|
|
DefineParam (1, 0, 0.0, 1.0)
|
|
EndParamDesc
|
|
/* now define the feature type itself (see features.h for info about each
|
|
parameter).*/
|
|
DefineFeature (OutlineFeatDesc, 3, 1, 1, MAX_OUTLINE_FEATURES, "Outline",
|
|
"of", OutlineFeatParams)
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
Global Data Definitions and Declarations
|
|
-----------------------------------------------------------------------------*/
|
|
FEATURE_DEFS_STRUCT FeatureDefs = {
|
|
NUM_FEATURE_TYPES,
|
|
{
|
|
&MicroFeatureDesc,
|
|
&PicoFeatDesc,
|
|
&OutlineFeatDesc,
|
|
&CharNormDesc
|
|
}
|
|
};
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
Public Code
|
|
-----------------------------------------------------------------------------*/
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Release the memory consumed by the specified character
|
|
* description and all of the features in that description.
|
|
*
|
|
* @param CharDesc character description to be deallocated
|
|
*
|
|
* Globals:
|
|
* - none
|
|
*
|
|
* @note Exceptions: none
|
|
* @note History: Wed May 23 13:52:19 1990, DSJ, Created.
|
|
*/
|
|
void FreeCharDescription(CHAR_DESC CharDesc) {
|
|
int i;
|
|
|
|
if (CharDesc) {
|
|
for (i = 0; i < CharDesc->NumFeatureSets; i++)
|
|
FreeFeatureSet (CharDesc->FeatureSets[i]);
|
|
Efree(CharDesc);
|
|
}
|
|
} /* FreeCharDescription */
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Allocate a new character description, initialize its
|
|
* feature sets to be empty, and return it.
|
|
*
|
|
* Globals:
|
|
* - none
|
|
*
|
|
* @return New character description structure.
|
|
* @note Exceptions: none
|
|
* @note History: Wed May 23 15:27:10 1990, DSJ, Created.
|
|
*/
|
|
CHAR_DESC NewCharDescription() {
|
|
CHAR_DESC CharDesc;
|
|
int i;
|
|
|
|
CharDesc = (CHAR_DESC) Emalloc (sizeof (CHAR_DESC_STRUCT));
|
|
CharDesc->NumFeatureSets = FeatureDefs.NumFeatureTypes;
|
|
|
|
for (i = 0; i < CharDesc->NumFeatureSets; i++)
|
|
CharDesc->FeatureSets[i] = NULL;
|
|
|
|
return (CharDesc);
|
|
|
|
} /* NewCharDescription */
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Write a textual representation of CharDesc to File.
|
|
* The format used is to write out the number of feature
|
|
* sets which will be written followed by a representation of
|
|
* each feature set.
|
|
*
|
|
* Each set starts with the short name for that feature followed
|
|
* by a description of the feature set. Feature sets which are
|
|
* not present are not written.
|
|
*
|
|
* Globals:
|
|
* - none
|
|
*
|
|
* @param File open text file to write CharDesc to
|
|
* @param CharDesc character description to write to File
|
|
*
|
|
* @note Exceptions: none
|
|
* @note History: Wed May 23 17:21:18 1990, DSJ, Created.
|
|
*/
|
|
void WriteCharDescription(FILE *File, CHAR_DESC CharDesc) {
|
|
int Type;
|
|
int NumSetsToWrite = 0;
|
|
|
|
for (Type = 0; Type < CharDesc->NumFeatureSets; Type++)
|
|
if (CharDesc->FeatureSets[Type])
|
|
NumSetsToWrite++;
|
|
|
|
fprintf (File, " %d\n", NumSetsToWrite);
|
|
for (Type = 0; Type < CharDesc->NumFeatureSets; Type++)
|
|
if (CharDesc->FeatureSets[Type]) {
|
|
fprintf (File, "%s ", (FeatureDefs.FeatureDesc[Type])->ShortName);
|
|
WriteFeatureSet (File, CharDesc->FeatureSets[Type]);
|
|
}
|
|
} /* WriteCharDescription */
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Read a character description from File, and return
|
|
* a data structure containing this information. The data
|
|
* is formatted as follows:
|
|
* @verbatim
|
|
NumberOfSets
|
|
ShortNameForSet1 Set1
|
|
ShortNameForSet2 Set2
|
|
...
|
|
@endverbatim
|
|
*
|
|
* Globals:
|
|
* - none
|
|
*
|
|
* @param File open text file to read character description from
|
|
* @return Character description read from File.
|
|
* @note Exceptions:
|
|
* - ILLEGAL_NUM_SETS
|
|
* @note History: Wed May 23 17:32:48 1990, DSJ, Created.
|
|
*/
|
|
CHAR_DESC ReadCharDescription(FILE *File) {
|
|
int NumSetsToRead;
|
|
char ShortName[FEAT_NAME_SIZE];
|
|
CHAR_DESC CharDesc;
|
|
int Type;
|
|
|
|
if (fscanf (File, "%d", &NumSetsToRead) != 1 ||
|
|
NumSetsToRead < 0 || NumSetsToRead > FeatureDefs.NumFeatureTypes)
|
|
DoError (ILLEGAL_NUM_SETS, "Illegal number of feature sets");
|
|
|
|
CharDesc = NewCharDescription ();
|
|
for (; NumSetsToRead > 0; NumSetsToRead--) {
|
|
fscanf (File, "%s", ShortName);
|
|
Type = ShortNameToFeatureType (ShortName);
|
|
CharDesc->FeatureSets[Type] =
|
|
ReadFeatureSet (File, FeatureDefs.FeatureDesc[Type]);
|
|
}
|
|
return (CharDesc);
|
|
|
|
} // ReadCharDescription
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
int ShortNameToFeatureType(const char *ShortName) {
|
|
/**
|
|
* Search thru all features currently defined and return
|
|
* the feature type for the feature with the specified short
|
|
* name. Trap an error if the specified name is not found.
|
|
*
|
|
* Globals:
|
|
* - none
|
|
*
|
|
* @param ShortName short name of a feature type
|
|
* @return Feature type which corresponds to ShortName.
|
|
* @note Exceptions:
|
|
* - ILLEGAL_SHORT_NAME
|
|
* @note History: Wed May 23 15:36:05 1990, DSJ, Created.
|
|
*/
|
|
int i;
|
|
|
|
for (i = 0; i < FeatureDefs.NumFeatureTypes; i++)
|
|
if (!strcmp ((FeatureDefs.FeatureDesc[i]->ShortName), ShortName))
|
|
return (i);
|
|
DoError (ILLEGAL_SHORT_NAME, "Illegal short name for a feature");
|
|
return 0;
|
|
|
|
} // ShortNameToFeatureType
|