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git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@157 d0cd1f9f-072b-0410-8dd7-cf729c803f20
121 lines
4.9 KiB
C++
121 lines
4.9 KiB
C++
/**********************************************************************
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* File: charcut.h (Formerly charclip.h)
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* Description: Code for character clipping
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* Author: Phil Cheatle
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* Created: Wed Nov 11 08:35:15 GMT 1992
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*
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* (C) Copyright 1991, Hewlett-Packard Ltd.
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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 CHARCUT_H
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#define CHARCUT_H
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#include "pgedit.h"
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#include "notdll.h"
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#include "notdll.h"
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class ScrollView;
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/*************************************************************************
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* CLASS PIXROW
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*
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* This class describes the pixels occupied by a blob. It uses two arrays, (min
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* and max), each with one element per row, to identify the min and max x
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* coordinates of the black pixels in the character on that row of the image.
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* The number of rows used to describe the blob is held in row_count - note that
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* some rows may be unoccupied - signified by max < min. The page coordinate of
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* the row defined by min[0] and max[0] is held in row_offset.
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*************************************************************************/
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class PIXROW:public ELIST_LINK
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{
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public:
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inT16 row_offset; //y coord of min[0]
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inT16 row_count; //length of arrays
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inT16 *min; //array of min x
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inT16 *max; //array of max x
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PIXROW() { //empty constructor
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row_offset = 0;
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row_count = 0;
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min = NULL;
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max = NULL;
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}
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PIXROW( //specified size
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inT16 pos,
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inT16 count,
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PBLOB *blob);
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~PIXROW () { //destructor
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if (min != NULL)
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free_mem(min);
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if (max != NULL)
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free_mem(max);
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max = NULL;
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}
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void plot( //use current settings
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ScrollView* fd) const; //where to paint
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TBOX bounding_box() const; //return bounding box
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//return true if box exceeds image
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bool bad_box(int xsize, int ysize) const;
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void contract( //force end on black
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IMAGELINE *imlines, //image array
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inT16 x_offset, //of pixels[0]
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inT16 foreground_colour); //0 or 1
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//image array
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BOOL8 extend(IMAGELINE *imlines,
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TBOX &imbox,
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PIXROW *prev, //for prev blob
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PIXROW *next, //for next blob
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inT16 foreground_colour); //0 or 1
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//box of imlines extnt
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void char_clip_image(IMAGELINE *imlines,
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TBOX &im_box,
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ROW *row, //row containing word
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IMAGE &clip_image, //unscaled char image
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float &baseline_pos); //baseline ht in image
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};
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ELISTIZEH (PIXROW)
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extern INT_VAR_H (pix_word_margin, 3, "How far outside word BB to grow");
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extern BOOL_VAR_H (show_char_clipping, TRUE, "Show clip image window?");
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extern INT_VAR_H (net_image_width, 40, "NN input image width");
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extern INT_VAR_H (net_image_height, 36, "NN input image height");
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extern INT_VAR_H (net_image_x_height, 22, "NN input image x_height");
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void char_clip_word( //
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WERD *word, //word to be processed
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IMAGE &bin_image, //whole image
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PIXROW_LIST *&pixrow_list, //pixrows built
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IMAGELINE *&imlines, //lines cut from image
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TBOX &pix_box //box defining imlines
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);
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IMAGELINE *generate_imlines( //get some imagelines
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IMAGE &bin_image, //from here
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TBOX &pix_box);
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//word to be processed
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ScrollView* display_clip_image(WERD *word,
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IMAGE &bin_image, //whole image
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PIXROW_LIST *pixrow_list, //pixrows built
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TBOX &pix_box //box of subimage
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);
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void display_images(IMAGE &clip_image, IMAGE &scaled_image);
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void plot_pixrows( //plot for all blobs
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PIXROW_LIST *pixrow_list,
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ScrollView* win);
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#endif
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