tesseract  5.0.0
gradechop.cpp
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1 /******************************************************************************
2  *
3  * File: gradechop.cpp (Formerly gradechop.c)
4  * Description:
5  * Author: Mark Seaman, OCR Technology
6  *
7  * (c) Copyright 1987, Hewlett-Packard Company.
8  ** Licensed under the Apache License, Version 2.0 (the "License");
9  ** you may not use this file except in compliance with the License.
10  ** You may obtain a copy of the License at
11  ** http://www.apache.org/licenses/LICENSE-2.0
12  ** Unless required by applicable law or agreed to in writing, software
13  ** distributed under the License is distributed on an "AS IS" BASIS,
14  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  ** See the License for the specific language governing permissions and
16  ** limitations under the License.
17  *
18  *****************************************************************************/
19 /*----------------------------------------------------------------------
20  I n c l u d e s
21 ----------------------------------------------------------------------*/
22 
23 #include <algorithm>
24 #include <cmath>
25 #include "chop.h"
26 #include "wordrec.h"
27 
28 /*----------------------------------------------------------------------
29  M a c r o s
30 ----------------------------------------------------------------------*/
31 
32 namespace tesseract {
33 
34 /*----------------------------------------------------------------------
35  F u n c t i o n s
36 ----------------------------------------------------------------------*/
37 
38 /**********************************************************************
39  * grade_split_length
40  *
41  * Return a grade for the length of this split.
42  * 0 = "perfect"
43  * 100 = "no way jay"
44  **********************************************************************/
46  PRIORITY grade;
47  float split_length;
48 
49  split_length = split->point1->WeightedDistance(*split->point2, chop_x_y_weight);
50 
51  if (split_length <= 0) {
52  grade = 0;
53  } else {
54  grade = std::sqrt(split_length) * chop_split_dist_knob;
55  }
56 
57  return (std::max(0.0f, grade));
58 }
59 
60 /**********************************************************************
61  * grade_sharpness
62  *
63  * Return a grade for the sharpness of this split.
64  * 0 = "perfect"
65  * 100 = "no way jay"
66  **********************************************************************/
68  PRIORITY grade;
69 
70  grade = point_priority(split->point1) + point_priority(split->point2);
71 
72  if (grade < -360.0) {
73  grade = 0;
74  } else {
75  grade += 360.0;
76  }
77 
78  grade *= chop_sharpness_knob; /* Values 0 to -360 */
79 
80  return (grade);
81 }
82 
83 } // namespace tesseract
const std::vector< std::string > split(const std::string &s, char c)
Definition: helpers.h:41
float PRIORITY
Definition: seam.h:31
PRIORITY grade_sharpness(SPLIT *split)
Definition: gradechop.cpp:67
PRIORITY grade_split_length(SPLIT *split)
Definition: gradechop.cpp:45
PRIORITY point_priority(EDGEPT *point)
Definition: chop.cpp:64