mirror of
https://github.com/tesseract-ocr/tesseract.git
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84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
/******************************************************************************
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** Filename: mf.c
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** Purpose: Micro-feature interface to flexible feature extractor.
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** Author: Dan Johnson
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** History: Thu May 24 09:08:38 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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#include "mf.h"
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#include "featdefs.h"
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#include "mfdefs.h"
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#include "mfx.h"
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#include <math.h>
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/*----------------------------------------------------------------------------
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Global Data Definitions and Declarations
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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Private Code
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----------------------------------------------------------------------------*/
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/**
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* Call the old micro-feature extractor and then copy
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* the features into the new format. Then deallocate the
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* old micro-features.
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* @param Blob blob to extract micro-features from
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* @param cn_denorm control parameter to feature extractor.
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* @return Micro-features for Blob.
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* @note Exceptions: none
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* @note History: Wed May 23 18:06:38 1990, DSJ, Created.
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*/
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FEATURE_SET ExtractMicros(TBLOB* Blob, const DENORM& cn_denorm) {
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int NumFeatures;
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MICROFEATURES Features, OldFeatures;
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FEATURE_SET FeatureSet;
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FEATURE Feature;
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MICROFEATURE OldFeature;
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OldFeatures = BlobMicroFeatures(Blob, cn_denorm);
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if (OldFeatures == nullptr)
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return nullptr;
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NumFeatures = count (OldFeatures);
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FeatureSet = NewFeatureSet (NumFeatures);
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Features = OldFeatures;
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iterate(Features) {
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OldFeature = (MICROFEATURE) first_node (Features);
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Feature = NewFeature (&MicroFeatureDesc);
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Feature->Params[MFDirection] = OldFeature[ORIENTATION];
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Feature->Params[MFXPosition] = OldFeature[XPOSITION];
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Feature->Params[MFYPosition] = OldFeature[YPOSITION];
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Feature->Params[MFLength] = OldFeature[MFLENGTH];
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// Bulge features are deprecated and should not be used. Set to 0.
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Feature->Params[MFBulge1] = 0.0f;
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Feature->Params[MFBulge2] = 0.0f;
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#ifndef _WIN32
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// Assert that feature parameters are well defined.
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int i;
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for (i = 0; i < Feature->Type->NumParams; i++) {
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ASSERT_HOST(!isnan(Feature->Params[i]));
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}
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#endif
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AddFeature(FeatureSet, Feature);
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}
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FreeMicroFeatures(OldFeatures);
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return FeatureSet;
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} /* ExtractMicros */
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