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3a5f699013
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@1064 d0cd1f9f-072b-0410-8dd7-cf729c803f20
311 lines
10 KiB
C++
311 lines
10 KiB
C++
/******************************************************************************
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** Filename: featdefs.c
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** Purpose: Definitions of currently defined feature types.
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** Author: Dan Johnson
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** History: Mon May 21 10:26:21 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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/*-----------------------------------------------------------------------------
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Include Files and Type Defines
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-----------------------------------------------------------------------------*/
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#ifdef _MSC_VER
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#include <mathfix.h>
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#endif
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#include "featdefs.h"
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#include "emalloc.h"
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#include "danerror.h"
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#include "scanutils.h"
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#include <string.h>
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#include <stdio.h>
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/** define errors triggered by this module */
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#define ILLEGAL_NUM_SETS 3001
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#define PICO_FEATURE_LENGTH 0.05
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/*-----------------------------------------------------------------------------
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Global Data Definitions and Declarations
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-----------------------------------------------------------------------------*/
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const char* kMicroFeatureType = "mf";
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const char* kCNFeatureType = "cn";
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const char* kIntFeatureType = "if";
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const char* kGeoFeatureType = "tb";
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// Define all of the parameters for the MicroFeature type.
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StartParamDesc(MicroFeatureParams)
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DefineParam(0, 0, -0.5, 0.5)
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DefineParam(0, 0, -0.25, 0.75)
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DefineParam(0, 1, 0.0, 1.0)
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DefineParam(1, 0, 0.0, 1.0)
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DefineParam (0, 1, -0.5, 0.5)
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DefineParam (0, 1, -0.5, 0.5)
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EndParamDesc
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// Now define the feature type itself (see features.h for parameters).
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DefineFeature(MicroFeatureDesc, 5, 1, kMicroFeatureType, MicroFeatureParams)
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// Define all of the parameters for the NormFeat type.
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StartParamDesc (CharNormParams)
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DefineParam(0, 0, -0.25, 0.75)
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DefineParam(0, 1, 0.0, 1.0)
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DefineParam(0, 0, 0.0, 1.0)
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DefineParam(0, 0, 0.0, 1.0)
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EndParamDesc
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// Now define the feature type itself (see features.h for parameters).
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DefineFeature(CharNormDesc, 4, 0, kCNFeatureType, CharNormParams)
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// Define all of the parameters for the IntFeature type
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StartParamDesc(IntFeatParams)
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DefineParam(0, 0, 0.0, 255.0)
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DefineParam(0, 0, 0.0, 255.0)
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DefineParam(1, 0, 0.0, 255.0)
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EndParamDesc
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// Now define the feature type itself (see features.h for parameters).
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DefineFeature(IntFeatDesc, 2, 1, kIntFeatureType, IntFeatParams)
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// Define all of the parameters for the GeoFeature type
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StartParamDesc(GeoFeatParams)
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DefineParam(0, 0, 0.0, 255.0)
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DefineParam(0, 0, 0.0, 255.0)
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DefineParam(0, 0, 0.0, 255.0)
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EndParamDesc
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// Now define the feature type itself (see features.h for parameters).
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DefineFeature(GeoFeatDesc, 3, 0, kGeoFeatureType, GeoFeatParams)
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// Other features used for training the adaptive classifier, but not used
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// during normal training, therefore not in the DescDefs array.
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// Define all of the parameters for the PicoFeature type
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// define knob that can be used to adjust pico-feature length.
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FLOAT32 PicoFeatureLength = PICO_FEATURE_LENGTH;
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StartParamDesc(PicoFeatParams)
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DefineParam(0, 0, -0.25, 0.75)
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DefineParam(1, 0, 0.0, 1.0)
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DefineParam(0, 0, -0.5, 0.5)
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EndParamDesc
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// Now define the feature type itself (see features.h for parameters).
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DefineFeature(PicoFeatDesc, 2, 1, "pf", PicoFeatParams)
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// Define all of the parameters for the OutlineFeature type.
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StartParamDesc(OutlineFeatParams)
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DefineParam(0, 0, -0.5, 0.5)
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DefineParam(0, 0, -0.25, 0.75)
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DefineParam(0, 0, 0.0, 1.0)
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DefineParam(1, 0, 0.0, 1.0)
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EndParamDesc
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// Now define the feature type itself (see features.h for parameters).
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DefineFeature(OutlineFeatDesc, 3, 1, "of", OutlineFeatParams)
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// MUST be kept in-sync with ExtractorDefs in fxdefs.cpp.
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static const FEATURE_DESC_STRUCT *DescDefs[NUM_FEATURE_TYPES] = {
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&MicroFeatureDesc,
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&CharNormDesc,
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&IntFeatDesc,
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&GeoFeatDesc
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};
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/*-----------------------------------------------------------------------------
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Public Code
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-----------------------------------------------------------------------------*/
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void InitFeatureDefs(FEATURE_DEFS_STRUCT *featuredefs) {
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featuredefs->NumFeatureTypes = NUM_FEATURE_TYPES;
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for (int i = 0; i < NUM_FEATURE_TYPES; ++i) {
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featuredefs->FeatureDesc[i] = DescDefs[i];
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}
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}
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/*---------------------------------------------------------------------------*/
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/**
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* Release the memory consumed by the specified character
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* description and all of the features in that description.
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*
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* @param CharDesc character description to be deallocated
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*
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* Globals:
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* - none
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*
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* @note Exceptions: none
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* @note History: Wed May 23 13:52:19 1990, DSJ, Created.
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*/
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void FreeCharDescription(CHAR_DESC CharDesc) {
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int i;
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if (CharDesc) {
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for (i = 0; i < CharDesc->NumFeatureSets; i++)
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FreeFeatureSet (CharDesc->FeatureSets[i]);
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Efree(CharDesc);
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}
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} /* FreeCharDescription */
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/*---------------------------------------------------------------------------*/
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/**
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* Allocate a new character description, initialize its
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* feature sets to be empty, and return it.
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*
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* Globals:
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* - none
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*
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* @return New character description structure.
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* @note Exceptions: none
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* @note History: Wed May 23 15:27:10 1990, DSJ, Created.
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*/
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CHAR_DESC NewCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs) {
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CHAR_DESC CharDesc;
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int i;
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CharDesc = (CHAR_DESC) Emalloc (sizeof (CHAR_DESC_STRUCT));
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CharDesc->NumFeatureSets = FeatureDefs.NumFeatureTypes;
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for (i = 0; i < CharDesc->NumFeatureSets; i++)
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CharDesc->FeatureSets[i] = NULL;
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return (CharDesc);
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} /* NewCharDescription */
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/*---------------------------------------------------------------------------*/
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/**
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* Write a textual representation of CharDesc to File.
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* The format used is to write out the number of feature
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* sets which will be written followed by a representation of
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* each feature set.
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*
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* Each set starts with the short name for that feature followed
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* by a description of the feature set. Feature sets which are
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* not present are not written.
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*
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* Globals:
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* - none
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*
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* @param FeatureDefs definitions of feature types/extractors
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* @param File open text file to write CharDesc to
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* @param CharDesc character description to write to File
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*
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* @note Exceptions: none
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* @note History: Wed May 23 17:21:18 1990, DSJ, Created.
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*/
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void WriteCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs,
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FILE *File, CHAR_DESC CharDesc) {
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int Type;
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int NumSetsToWrite = 0;
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for (Type = 0; Type < CharDesc->NumFeatureSets; Type++)
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if (CharDesc->FeatureSets[Type])
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NumSetsToWrite++;
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fprintf (File, " %d\n", NumSetsToWrite);
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for (Type = 0; Type < CharDesc->NumFeatureSets; Type++)
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if (CharDesc->FeatureSets[Type]) {
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fprintf (File, "%s ", (FeatureDefs.FeatureDesc[Type])->ShortName);
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WriteFeatureSet (File, CharDesc->FeatureSets[Type]);
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}
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} /* WriteCharDescription */
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// Return whether all of the fields of the given feature set
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// are well defined (not inf or nan).
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bool ValidCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs,
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CHAR_DESC CharDesc) {
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bool anything_written = false;
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bool well_formed = true;
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for (int Type = 0; Type < CharDesc->NumFeatureSets; Type++) {
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if (CharDesc->FeatureSets[Type]) {
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for (int i = 0; i < CharDesc->FeatureSets[Type]->NumFeatures; i++) {
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FEATURE feat = CharDesc->FeatureSets[Type]->Features[i];
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for (int p = 0; p < feat->Type->NumParams; p++) {
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if (isnan(feat->Params[p]) || isinf(feat->Params[p]))
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well_formed = false;
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else
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anything_written = true;
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}
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}
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}
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}
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return anything_written && well_formed;
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} /* ValidCharDescription */
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/*---------------------------------------------------------------------------*/
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/**
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* Read a character description from File, and return
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* a data structure containing this information. The data
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* is formatted as follows:
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* @verbatim
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NumberOfSets
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ShortNameForSet1 Set1
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ShortNameForSet2 Set2
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...
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@endverbatim
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*
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* Globals:
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* - none
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*
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* @param FeatureDefs definitions of feature types/extractors
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* @param File open text file to read character description from
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* @return Character description read from File.
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* @note Exceptions:
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* - ILLEGAL_NUM_SETS
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* @note History: Wed May 23 17:32:48 1990, DSJ, Created.
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*/
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CHAR_DESC ReadCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs,
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FILE *File) {
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int NumSetsToRead;
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char ShortName[FEAT_NAME_SIZE];
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CHAR_DESC CharDesc;
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int Type;
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if (tfscanf(File, "%d", &NumSetsToRead) != 1 ||
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NumSetsToRead < 0 || NumSetsToRead > FeatureDefs.NumFeatureTypes)
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DoError (ILLEGAL_NUM_SETS, "Illegal number of feature sets");
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CharDesc = NewCharDescription(FeatureDefs);
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for (; NumSetsToRead > 0; NumSetsToRead--) {
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tfscanf(File, "%s", ShortName);
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Type = ShortNameToFeatureType(FeatureDefs, ShortName);
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CharDesc->FeatureSets[Type] =
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ReadFeatureSet (File, FeatureDefs.FeatureDesc[Type]);
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}
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return (CharDesc);
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} // ReadCharDescription
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/*---------------------------------------------------------------------------*/
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/**
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* Search thru all features currently defined and return
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* the feature type for the feature with the specified short
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* name. Trap an error if the specified name is not found.
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*
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* Globals:
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* - none
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*
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* @param FeatureDefs definitions of feature types/extractors
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* @param ShortName short name of a feature type
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* @return Feature type which corresponds to ShortName.
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* @note Exceptions:
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* - ILLEGAL_SHORT_NAME
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* @note History: Wed May 23 15:36:05 1990, DSJ, Created.
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*/
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int ShortNameToFeatureType(const FEATURE_DEFS_STRUCT &FeatureDefs,
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const char *ShortName) {
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int i;
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for (i = 0; i < FeatureDefs.NumFeatureTypes; i++)
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if (!strcmp ((FeatureDefs.FeatureDesc[i]->ShortName), ShortName))
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return (i);
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DoError (ILLEGAL_SHORT_NAME, "Illegal short name for a feature");
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return 0;
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} // ShortNameToFeatureType
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