/usr/include/tesseract/scanedg.h is in libtesseract-dev 3.02.01-6.
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* File: scanedg.h (Formerly scanedge.h)
* Description: Raster scanning crack based edge extractor.
* Author: Ray Smith
* Created: Fri Mar 22 16:11:50 GMT 1991
*
* (C) Copyright 1991, 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 SCANEDG_H
#define SCANEDG_H
#include "params.h"
#include "scrollview.h"
#include "img.h"
#include "pdblock.h"
#include "crakedge.h"
class C_OUTLINE_IT;
struct CrackPos {
CRACKEDGE** free_cracks; // Freelist for fast allocation.
int x; // Position of new edge.
int y;
};
void block_edges(IMAGE *t_image, // thresholded image
PDBLK *block, // block in image
C_OUTLINE_IT* outline_it);
void make_margins(PDBLK *block, // block in image
BLOCK_LINE_IT *line_it, // for old style
uinT8 *pixels, // pixels to strip
uinT8 margin, // white-out pixel
inT16 left, // block edges
inT16 right,
inT16 y); // line coord );
void whiteout_block(IMAGE *t_image, // thresholded image
PDBLK *block); // block in image
void line_edges(inT16 x, // coord of line start
inT16 y, // coord of line
inT16 xext, // width of line
uinT8 uppercolour, // start of prev line
uinT8 * bwpos, // thresholded line
CRACKEDGE ** prevline, // edges in progress
CRACKEDGE **free_cracks,
C_OUTLINE_IT* outline_it);
CRACKEDGE *h_edge(int sign, // sign of edge
CRACKEDGE * join, // edge to join to
CrackPos* pos);
CRACKEDGE *v_edge(int sign, // sign of edge
CRACKEDGE * join, // edge to join to
CrackPos* pos);
void join_edges(CRACKEDGE *edge1, // edges to join
CRACKEDGE *edge2, // no specific order
CRACKEDGE **free_cracks,
C_OUTLINE_IT* outline_it);
void free_crackedges(CRACKEDGE *start);
#endif
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