/usr/include/tesseract/mergenf.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: MergeNF.c
** Purpose: Program for merging similar nano-feature protos
** Author: Dan Johnson
** History: Wed Nov 21 09:55:23 1990, 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 "protos.h"
#include "cluster.h"
#include "ocrfeatures.h"
#include "callcpp.h"
#include "picofeat.h"
#define WORST_MATCH_ALLOWED (0.9)
#define WORST_EVIDENCE (1.0)
#define MAX_LENGTH_MISMATCH (2.0 * GetPicoFeatureLength ())
#define PROTO_SUFFIX ".mf.p"
#define CONFIG_SUFFIX ".cl"
#define NO_PROTO (-1)
#define XPOSITION 0
#define YPOSITION 1
#define MFLENGTH 2
#define ORIENTATION 3
typedef struct
{
FLOAT32 MinX, MaxX, MinY, MaxY;
} FRECT;
/**----------------------------------------------------------------------------
Public Macros
----------------------------------------------------------------------------**/
#define CenterX(M) ( (M)[XPOSITION] )
#define CenterY(M) ( (M)[YPOSITION] )
#define LengthOf(M) ( (M)[MFLENGTH] )
#define OrientationOf(M) ( (M)[ORIENTATION] )
/**----------------------------------------------------------------------------
Public Function Prototypes
----------------------------------------------------------------------------**/
FLOAT32 CompareProtos (
PROTO p1,
PROTO p2);
void ComputeMergedProto (
PROTO p1,
PROTO p2,
FLOAT32 w1,
FLOAT32 w2,
PROTO MergedProto);
int FindClosestExistingProto (
CLASS_TYPE Class,
int NumMerged[],
PROTOTYPE *Prototype);
void MakeNewFromOld (
PROTO New,
PROTOTYPE *Old);
FLOAT32 SubfeatureEvidence (
FEATURE Feature,
PROTO Proto);
double EvidenceOf (
register double Similarity);
BOOL8 DummyFastMatch (
FEATURE Feature,
PROTO Proto);
void ComputePaddedBoundingBox (
PROTO Proto,
FLOAT32 TangentPad,
FLOAT32 OrthogonalPad,
FRECT *BoundingBox);
BOOL8 PointInside (
FRECT *Rectangle,
FLOAT32 X,
FLOAT32 Y);
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