tesseract  4.1.1
gradechop.cpp
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1 /* -*-C-*-
2  ********************************************************************************
3  *
4  * File: gradechop.cpp (Formerly gradechop.c)
5  * Description:
6  * Author: Mark Seaman, OCR Technology
7  *
8  * (c) Copyright 1987, Hewlett-Packard Company.
9  ** Licensed under the Apache License, Version 2.0 (the "License");
10  ** you may not use this file except in compliance with the License.
11  ** You may obtain a copy of the License at
12  ** http://www.apache.org/licenses/LICENSE-2.0
13  ** Unless required by applicable law or agreed to in writing, software
14  ** distributed under the License is distributed on an "AS IS" BASIS,
15  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16  ** See the License for the specific language governing permissions and
17  ** limitations under the License.
18  *
19  *********************************************************************************/
20 /*----------------------------------------------------------------------
21  I n c l u d e s
22 ----------------------------------------------------------------------*/
23 
24 #include "wordrec.h"
25 #include "chop.h"
26 #include <algorithm>
27 #include <cmath>
28 
29 /*----------------------------------------------------------------------
30  M a c r o s
31 ----------------------------------------------------------------------*/
32 
33 namespace tesseract {
34 
35 /*----------------------------------------------------------------------
36  F u n c t i o n s
37 ----------------------------------------------------------------------*/
38 
39 /**********************************************************************
40  * grade_split_length
41  *
42  * Return a grade for the length of this split.
43  * 0 = "perfect"
44  * 100 = "no way jay"
45  **********************************************************************/
47  PRIORITY grade;
48  float split_length;
49 
50  split_length =
52 
53  if (split_length <= 0)
54  grade = 0;
55  else
56  grade = sqrt (split_length) * chop_split_dist_knob;
57 
58  return (std::max(0.0f, grade));
59 }
60 
61 
62 /**********************************************************************
63  * grade_sharpness
64  *
65  * Return a grade for the sharpness of this split.
66  * 0 = "perfect"
67  * 100 = "no way jay"
68  **********************************************************************/
70  PRIORITY grade;
71 
72  grade = point_priority (split->point1) + point_priority (split->point2);
73 
74  if (grade < -360.0)
75  grade = 0;
76  else
77  grade += 360.0;
78 
79  grade *= chop_sharpness_knob; /* Values 0 to -360 */
80 
81  return (grade);
82 }
83 
84 
85 } // namespace tesseract
float PRIORITY
Definition: seam.h:36
int WeightedDistance(const EDGEPT &other, int x_factor) const
Definition: blobs.h:122
Definition: split.h:37
EDGEPT * point1
Definition: split.h:103
EDGEPT * point2
Definition: split.h:104
double chop_sharpness_knob
Definition: wordrec.h:219
PRIORITY grade_sharpness(SPLIT *split)
Definition: gradechop.cpp:69
PRIORITY grade_split_length(SPLIT *split)
Definition: gradechop.cpp:46
PRIORITY point_priority(EDGEPT *point)
Definition: chop.cpp:66
double chop_split_dist_knob
Definition: wordrec.h:214