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60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
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///////////////////////////////////////////////////////////////////////
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// File: equationdetectbase.h
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// Description: The base class equation detection class.
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// Author: Zongyi (Joe) Liu (joeliu@google.com)
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// Created: Fri Aug 31 11:13:01 PST 2011
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//
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// (C) Copyright 2011, Google Inc.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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///////////////////////////////////////////////////////////////////////
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#ifndef TESSERACT_TEXTORD_EQUATIONDETECTBASE_H__
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#define TESSERACT_TEXTORD_EQUATIONDETECTBASE_H__
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class BLOBNBOX_LIST;
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class TO_BLOCK;
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struct Pix;
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namespace tesseract {
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class ColPartitionGrid;
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class ColPartitionSet;
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class EquationDetectBase {
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public:
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EquationDetectBase();
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virtual ~EquationDetectBase();
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// Iterate over the blobs inside to_block, and set the blobs that we want to
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// process to BSTT_NONE. (By default, they should be BSTT_SKIP). The function
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// returns 0 upon success.
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virtual int LabelSpecialText(TO_BLOCK* to_block) = 0;
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// Interface to find possible equation partition grid from part_grid. This
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// should be called after IdentifySpecialText function.
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virtual int FindEquationParts(ColPartitionGrid* part_grid,
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ColPartitionSet** best_columns) = 0;
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// Debug function: Render a bounding box on pix based on the value of its
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// special_text_type, specifically:
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// BSTT_MATH: red box
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// BSTT_DIGIT: cyan box
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// BSTT_ITALIC: green box
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// BSTT_UNCLEAR: blue box
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// All others: yellow box
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static void RenderSpecialText(Pix* pix, BLOBNBOX* blob);
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};
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}; // namespace tesseract
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#endif // TESSERACT_TEXTORD_EQUATIONDETECTBASE_H__
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