tesseract-ocr/training/mergenf.h

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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 "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;

#define CenterX(M)              ( (M)[XPOSITION] )
#define CenterY(M)              ( (M)[YPOSITION] )
#define LengthOf(M)             ( (M)[MFLENGTH] )
#define OrientationOf(M)        ( (M)[ORIENTATION] )

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);