/usr/include/tesseract/intfx.h is in libtesseract-dev 3.02.01-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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** Filename: intfx.h
** Purpose: Interface to high level integer feature extractor.
** Author: Robert Moss
** History: Tue May 21 15:51:57 MDT 1991, RWM, 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.
******************************************************************************/
#ifndef INTFX_H
#define INTFX_H
/**----------------------------------------------------------------------------
Include Files and Type Defines
----------------------------------------------------------------------------**/
#include "blobs.h"
#include "intproto.h"
#include "normalis.h"
#include <math.h>
class DENORM;
namespace tesseract {
class TrainingSample;
}
struct INT_FX_RESULT_STRUCT {
inT32 Length; // total length of all outlines
inT16 Xmean, Ymean; // center of mass of all outlines
inT16 Rx, Ry; // radius of gyration
inT16 NumBL, NumCN; // number of features extracted
inT16 Width; // Width of blob in BLN coords.
uinT8 YBottom; // Bottom of blob in BLN coords.
uinT8 YTop; // Top of blob in BLN coords.
};
/**----------------------------------------------------------------------------
Public Function Prototypes
----------------------------------------------------------------------------**/
void InitIntegerFX();
// Returns a vector representing the direction of a feature with the given
// theta direction in an INT_FEATURE_STRUCT.
FCOORD FeatureDirection(uinT8 theta);
tesseract::TrainingSample* GetIntFeatures(
tesseract::NormalizationMode mode, TBLOB *blob,
const DENORM& denorm);
int ExtractIntFeat(TBLOB *Blob,
const DENORM& denorm,
INT_FEATURE_ARRAY BLFeat,
INT_FEATURE_ARRAY CNFeat,
INT_FX_RESULT_STRUCT* Results,
inT32 *FeatureOutlineArray = 0);
uinT8 BinaryAnglePlusPi(inT32 Y, inT32 X);
int SaveFeature(INT_FEATURE_ARRAY FeatureArray,
uinT16 FeatureNum,
inT16 X,
inT16 Y,
uinT8 Theta);
uinT16 MySqrt(inT32 X, inT32 Y);
uinT8 MySqrt2(uinT16 N, uinT32 I, uinT8 *Exp);
void ClipRadius(uinT8 *RxInv, uinT8 *RxExp, uinT8 *RyInv, uinT8 *RyExp);
#endif
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