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76 lines
3.0 KiB
C++
76 lines
3.0 KiB
C++
/******************************************************************************
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** Filename: intfx.h
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** Purpose: Interface to high level integer feature extractor.
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** Author: Robert Moss
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** History: Tue May 21 15:51:57 MDT 1991, RWM, 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 INTFX_H
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#define INTFX_H
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/**----------------------------------------------------------------------------
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Include Files and Type Defines
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----------------------------------------------------------------------------**/
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#include "blobs.h"
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#include "intproto.h"
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#include "normalis.h"
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#include <math.h>
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class DENORM;
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namespace tesseract {
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class TrainingSample;
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}
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struct INT_FX_RESULT_STRUCT {
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inT32 Length; // total length of all outlines
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inT16 Xmean, Ymean; // center of mass of all outlines
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inT16 Rx, Ry; // radius of gyration
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inT16 NumBL, NumCN; // number of features extracted
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inT16 Width; // Width of blob in BLN coords.
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uinT8 YBottom; // Bottom of blob in BLN coords.
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uinT8 YTop; // Top of blob in BLN coords.
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};
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// The standard feature length
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const double kStandardFeatureLength = 64.0 / 5;
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/**----------------------------------------------------------------------------
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Public Function Prototypes
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----------------------------------------------------------------------------**/
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void InitIntegerFX();
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// Returns a vector representing the direction of a feature with the given
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// theta direction in an INT_FEATURE_STRUCT.
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FCOORD FeatureDirection(uinT8 theta);
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namespace tesseract {
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// Generates a TrainingSample from a TBLOB. Extracts features and sets
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// the bounding box, so classifiers that operate on the image can work.
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// TODO(rays) BlobToTrainingSample must remain a global function until
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// the FlexFx and FeatureDescription code can be removed and LearnBlob
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// made a member of Classify.
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TrainingSample* BlobToTrainingSample(
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const TBLOB& blob, bool nonlinear_norm, INT_FX_RESULT_STRUCT* fx_info,
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GenericVector<INT_FEATURE_STRUCT>* bl_features);
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}
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// Deprecated! Prefer tesseract::Classify::ExtractFeatures instead.
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bool ExtractIntFeat(const TBLOB& blob,
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bool nonlinear_norm,
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INT_FEATURE_ARRAY BLFeat,
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INT_FEATURE_ARRAY CNFeat,
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INT_FX_RESULT_STRUCT* Results);
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#endif
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