/usr/include/tesseract/underlin.h is in libtesseract-dev 3.02.01-6.
This file is owned by root:root, with mode 0o644.
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* File: underlin.h (Formerly undrline.h)
* Description: Code to chop blobs apart from underlines.
* Author: Ray Smith
* Created: Mon Aug 8 11:14:00 BST 1994
*
* (C) Copyright 1994, Hewlett-Packard Ltd.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*
**********************************************************************/
#ifndef UNDERLIN_H
#define UNDERLIN_H
#include "fpchop.h"
#include "notdll.h"
extern double_VAR_H (textord_underline_offset, 0.1,
"Fraction of x to ignore");
extern BOOL_VAR_H (textord_restore_underlines, FALSE,
"Chop underlines & put back");
void restore_underlined_blobs( //get chop points
TO_BLOCK *block //block to do
);
TO_ROW *most_overlapping_row( //find best row
TO_ROW_LIST *rows, //list of rows
BLOBNBOX *blob //blob to place
);
void find_underlined_blobs( //get chop points
BLOBNBOX *u_line, //underlined unit
QSPLINE *baseline, //actual baseline
float xheight, //height of line
float baseline_offset, //amount to shrinke it
ICOORDELT_LIST *chop_cells //places to chop
);
void vertical_cunderline_projection( //project outlines
C_OUTLINE *outline, //outline to project
QSPLINE *baseline, //actual baseline
float xheight, //height of line
float baseline_offset, //amount to shrinke it
STATS *lower_proj, //below baseline
STATS *middle_proj, //centre region
STATS *upper_proj //top region
);
#endif
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