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comparison mupdf-source/thirdparty/tesseract/src/training/mergenf.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /******************************************************************************
2 ** Filename: MergeNF.c
3 ** Purpose: Program for merging similar nano-feature protos
4 ** Author: Dan Johnson
5 **
6 ** (c) Copyright Hewlett-Packard Company, 1988.
7 ** Licensed under the Apache License, Version 2.0 (the "License");
8 ** you may not use this file except in compliance with the License.
9 ** You may obtain a copy of the License at
10 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 *****************************************************************************/
17
18 #ifndef TESSERACT_TRAINING_MERGENF_H_
19 #define TESSERACT_TRAINING_MERGENF_H_
20
21 /**----------------------------------------------------------------------------
22 Include Files and Type Defines
23 ----------------------------------------------------------------------------**/
24 #include "cluster.h"
25 #include "ocrfeatures.h"
26 #include "picofeat.h"
27 #include "protos.h"
28
29 #define WORST_MATCH_ALLOWED (0.9)
30 #define WORST_EVIDENCE (1.0)
31 #define MAX_LENGTH_MISMATCH (2.0 * GetPicoFeatureLength())
32
33 #define PROTO_SUFFIX ".mf.p"
34 #define CONFIG_SUFFIX ".cl"
35 #define NO_PROTO (-1)
36 #define XPOSITION 0
37 #define YPOSITION 1
38 #define MFLENGTH 2
39 #define ORIENTATION 3
40
41 struct FRECT {
42 float MinX, MaxX, MinY, MaxY;
43 };
44
45 /**----------------------------------------------------------------------------
46 Public Macros
47 ----------------------------------------------------------------------------**/
48 #define CenterX(M) ((M)[XPOSITION])
49 #define CenterY(M) ((M)[YPOSITION])
50 #define LengthOf(M) ((M)[MFLENGTH])
51 #define OrientationOf(M) ((M)[ORIENTATION])
52
53 /**----------------------------------------------------------------------------
54 Public Function Prototypes
55 ----------------------------------------------------------------------------**/
56 float CompareProtos(tesseract::PROTO_STRUCT *p1, tesseract::PROTO_STRUCT *p2);
57
58 void ComputeMergedProto(tesseract::PROTO_STRUCT *p1, tesseract::PROTO_STRUCT *p2, float w1, float w2,
59 tesseract::PROTO_STRUCT *MergedProto);
60
61 int FindClosestExistingProto(tesseract::CLASS_TYPE Class, int NumMerged[],
62 tesseract::PROTOTYPE *Prototype);
63
64 void MakeNewFromOld(tesseract::PROTO_STRUCT *New, tesseract::PROTOTYPE *Old);
65
66 float SubfeatureEvidence(tesseract::FEATURE Feature, tesseract::PROTO_STRUCT *Proto);
67
68 double EvidenceOf(double Similarity);
69
70 bool DummyFastMatch(tesseract::FEATURE Feature, tesseract::PROTO_STRUCT *Proto);
71
72 void ComputePaddedBoundingBox(tesseract::PROTO_STRUCT *Proto, float TangentPad, float OrthogonalPad,
73 FRECT *BoundingBox);
74
75 bool PointInside(FRECT *Rectangle, float X, float Y);
76
77 #endif // TESSERACT_TRAINING_MERGENF_H_