tesseract 4.1.1
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equationdetectbase.h
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1
2// File: equationdetectbase.h
3// Description: The base class equation detection class.
4// Author: Zongyi (Joe) Liu (joeliu@google.com)
5// Created: Fri Aug 31 11:13:01 PST 2011
6//
7// (C) Copyright 2011, Google Inc.
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//
19
20#ifndef TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_
21#define TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_
22
23class BLOBNBOX_LIST;
24class TO_BLOCK;
25struct Pix;
26
27namespace tesseract {
28
29class ColPartitionGrid;
30class ColPartitionSet;
31
33 public:
34 EquationDetectBase() = default;
36
37 // Iterate over the blobs inside to_block, and set the blobs that we want to
38 // process to BSTT_NONE. (By default, they should be BSTT_SKIP). The function
39 // returns 0 upon success.
40 virtual int LabelSpecialText(TO_BLOCK* to_block) = 0;
41
42 // Interface to find possible equation partition grid from part_grid. This
43 // should be called after IdentifySpecialText function.
44 virtual int FindEquationParts(ColPartitionGrid* part_grid,
45 ColPartitionSet** best_columns) = 0;
46
47 // Debug function: Render a bounding box on pix based on the value of its
48 // special_text_type, specifically:
49 // BSTT_MATH: red box
50 // BSTT_DIGIT: cyan box
51 // BSTT_ITALIC: green box
52 // BSTT_UNCLEAR: blue box
53 // All others: yellow box
54 static void RenderSpecialText(Pix* pix, BLOBNBOX* blob);
55};
56
57} // namespace tesseract
58
59#endif // TESSERACT_TEXTORD_EQUATIONDETECTBASE_H_
static void RenderSpecialText(Pix *pix, BLOBNBOX *blob)
virtual int FindEquationParts(ColPartitionGrid *part_grid, ColPartitionSet **best_columns)=0
virtual int LabelSpecialText(TO_BLOCK *to_block)=0