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ccstruct.h
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1 
2 // File: ccstruct.h
3 // Description: ccstruct class.
4 // Author: Samuel Charron
5 //
6 // (C) Copyright 2006, Google Inc.
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 //
18 
19 #ifndef TESSERACT_CCSTRUCT_CCSTRUCT_H__
20 #define TESSERACT_CCSTRUCT_CCSTRUCT_H__
21 
22 #include "cutil.h"
23 #include "image.h"
24 
25 namespace tesseract {
26 class CCStruct : public CUtil {
27  public:
28  CCStruct();
29  ~CCStruct();
30 
31  // Globally accessible constants.
32  // APPROXIMATIONS of the fractions of the character cell taken by
33  // the descenders, ascenders, and x-height.
34  static const double kDescenderFraction; // = 0.25;
35  static const double kXHeightFraction; // = 0.5;
36  static const double kAscenderFraction; // = 0.25;
37  // Derived value giving the x-height as a fraction of cap-height.
38  static const double kXHeightCapRatio; // = XHeight/(XHeight + Ascender).
39 
40  protected:
42 };
43 
44 class Tesseract;
45 } // namespace tesseract
46 
47 
48 #endif // TESSERACT_CCSTRUCT_CCSTRUCT_H__