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/******************************************************************************
** Filename: normfeat.c
** Purpose: Definition of char normalization features.
** Author: Dan Johnson
** History: 12/14/90, 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 "normfeat.h"
#include "mfoutline.h"
#include "intfx.h"
#include "ocrfeatures.h" //Debug
#include <stdio.h> //Debug
#include "efio.h" //Debug
//#include "christydbg.h"
/**----------------------------------------------------------------------------
Global Data Definitions and Declarations
----------------------------------------------------------------------------**/
/**----------------------------------------------------------------------------
Public Code
----------------------------------------------------------------------------**/
/*---------------------------------------------------------------------------*/
FLOAT32 ActualOutlineLength(FEATURE Feature) {
/*
** Parameters:
** Feature normalization feature
** Globals: none
** Operation: This routine returns the length that the outline
** would have been if it were baseline normalized instead
** of character normalized.
** Return: Baseline normalized length of outline.
** Exceptions: none
** History: Thu Dec 20 14:50:57 1990, DSJ, Created.
*/
return (Feature->Params[CharNormLength] * LENGTH_COMPRESSION);
} /* ActualOutlineLength */
/*---------------------------------------------------------------------------*/
FEATURE_SET ExtractCharNormFeatures(TBLOB *Blob, LINE_STATS *LineStats) {
/*
** Parameters:
** Blob blob to extract char norm feature from
** LineStats statistics on text row blob is in
** Globals: none
** Operation: Compute a feature whose parameters describe how a
** character will be affected by the character normalization
** algorithm. The feature parameters are:
** y position of center of mass in baseline coordinates
** total length of outlines in baseline coordinates
** divided by a scale factor
** radii of gyration about the center of mass in
** baseline coordinates
** Return: Character normalization feature for Blob.
** Exceptions: none
** History: Wed May 23 18:06:38 1990, DSJ, Created.
*/
FEATURE_SET FeatureSet;
FEATURE Feature;
FLOAT32 Scale;
FLOAT32 Baseline;
LIST Outlines;
INT_FEATURE_ARRAY blfeatures;
INT_FEATURE_ARRAY cnfeatures;
INT_FX_RESULT_STRUCT FXInfo;
/* allocate the feature and feature set - note that there is always one
and only one char normalization feature for any blob */
FeatureSet = NewFeatureSet (1);
Feature = NewFeature (&CharNormDesc);
AddFeature(FeatureSet, Feature);
/* compute the normalization statistics for this blob */
Outlines = ConvertBlob (Blob);
/*---------Debug--------------------------------------------------*
OFile = fopen ("f:/ims/debug/nfOutline.logCPP", "r");
if (OFile == NULL)
{
OFile = Efopen ("f:/ims/debug/nfOutline.logCPP", "w");
WriteOutlines(OFile, Outlines);
}
else
{
fclose (OFile);
OFile = Efopen ("f:/ims/debug/nfOutline.logCPP", "a");
}
WriteOutlines(OFile, Outlines);
fclose (OFile);
*--------------------------------------------------------------------*/
ExtractIntFeat(Blob, blfeatures, cnfeatures, &FXInfo);
Baseline = BaselineAt (LineStats, FXInfo.Xmean);
Scale = ComputeScaleFactor (LineStats);
Feature->Params[CharNormY] = (FXInfo.Ymean - Baseline) * Scale;
Feature->Params[CharNormLength] =
FXInfo.Length * Scale / LENGTH_COMPRESSION;
Feature->Params[CharNormRx] = FXInfo.Rx * Scale;
Feature->Params[CharNormRy] = FXInfo.Ry * Scale;
/*---------Debug--------------------------------------------------*
File = fopen ("f:/ims/debug/nfFeatSet.logCPP", "r");
if (File == NULL)
{
File = Efopen ("f:/ims/debug/nfFeatSet.logCPP", "w");
WriteFeatureSet(File, FeatureSet);
}
else
{
fclose (File);
File = Efopen ("f:/ims/debug/nfFeatSet.logCPP", "a");
}
WriteFeatureSet(File, FeatureSet);
fclose (File);
*--------------------------------------------------------------------*/
FreeOutlines(Outlines);
return (FeatureSet);
} /* ExtractCharNormFeatures */
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