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Diffstat (limited to 'tesseract/src/textord/oldbasel.h')
| -rw-r--r-- | tesseract/src/textord/oldbasel.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/tesseract/src/textord/oldbasel.h b/tesseract/src/textord/oldbasel.h new file mode 100644 index 00000000..0e25df0d --- /dev/null +++ b/tesseract/src/textord/oldbasel.h @@ -0,0 +1,164 @@ +/********************************************************************** + * File: oldbasel.h (Formerly oldbl.h) + * Description: A re-implementation of the old baseline algorithm. + * Author: Ray Smith + * + * (C) Copyright 1993, 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 OLDBASEL_H +#define OLDBASEL_H + +#include "params.h" +#include "blobbox.h" + +namespace tesseract { + +extern BOOL_VAR_H (textord_oldbl_debug, false, +"Debug old baseline generation"); + +int get_blob_coords( //get boxes + TO_ROW* row, //row to use + int32_t lineheight, //block level + TBOX* blobcoords, //output boxes + bool& holed_line, //lost a lot of blobs + int& outcount //no of real blobs +); +void make_first_baseline ( //initial approximation +TBOX blobcoords[], /*blob bounding boxes */ +int blobcount, /*no of blobcoords */ +int xcoords[], /*coords for spline */ +int ycoords[], /*approximator */ +QSPLINE * spline, /*initial spline */ +QSPLINE * baseline, /*output spline */ +float jumplimit /*guess half descenders */ +); +void make_holed_baseline ( //initial approximation +TBOX blobcoords[], /*blob bounding boxes */ +int blobcount, /*no of blobcoords */ +QSPLINE * spline, /*initial spline */ +QSPLINE * baseline, /*output spline */ +float gradient //of line +); +int partition_line ( //partition blobs +TBOX blobcoords[], //bounding boxes +int blobcount, /*no of blobs on row */ +int *numparts, /*number of partitions */ +char partids[], /*partition no of each blob */ +int partsizes[], /*no in each partition */ +QSPLINE * spline, /*curve to fit to */ +float jumplimit, /*allowed delta change */ +float ydiffs[] /*diff from spline */ +); +void merge_oldbl_parts ( //partition blobs +TBOX blobcoords[], //bounding boxes +int blobcount, /*no of blobs on row */ +char partids[], /*partition no of each blob */ +int partsizes[], /*no in each partition */ +int biggestpart, //major partition +float jumplimit /*allowed delta change */ +); +int get_ydiffs ( //evaluate differences +TBOX blobcoords[], //bounding boxes +int blobcount, /*no of blobs */ +QSPLINE * spline, /*approximating spline */ +float ydiffs[] /*output */ +); +int choose_partition ( //select partition +float diff, /*diff from spline */ +float partdiffs[], /*diff on all parts */ +int lastpart, /*last assigned partition */ +float jumplimit, /*new part threshold */ +float* drift, +float* last_delta, +int *partcount /*no of partitions */ +); +int partition_coords ( //find relevant coords +TBOX blobcoords[], //bounding boxes +int blobcount, /*no of blobs in row */ +char partids[], /*partition no of each blob */ +int bestpart, /*best new partition */ +int xcoords[], /*points to work on */ +int ycoords[] /*points to work on */ +); +int segment_spline ( //make xstarts +TBOX blobcoords[], //boundign boxes +int blobcount, /*no of blobs in row */ +int xcoords[], /*points to work on */ +int ycoords[], /*points to work on */ +int degree, int pointcount, /*no of points */ +int xstarts[] //result +); +bool split_stepped_spline( //make xstarts + QSPLINE* baseline, //current shot + float jumplimit, //max step function + int* xcoords, /*points to work on */ + int* xstarts, //result + int& segments //no of segments +); +void insert_spline_point ( //get descenders +int xstarts[], //starts to shuffle +int segment, //insertion pt +int coord1, //coords to add +int coord2, int &segments //total segments +); +void find_lesser_parts ( //get descenders +TO_ROW * row, //row to process +TBOX blobcoords[], //bounding boxes +int blobcount, /*no of blobs */ +char partids[], /*partition of each blob */ +int partsizes[], /*size of each part */ +int partcount, /*no of partitions */ +int bestpart /*biggest partition */ +); + +void old_first_xheight ( //the wiseowl way +TO_ROW * row, /*current row */ +TBOX blobcoords[], /*blob bounding boxes */ +int initialheight, //initial guess +int blobcount, /*blobs in blobcoords */ +QSPLINE * baseline, /*established */ +float jumplimit /*min ascender height */ +); + +void make_first_xheight ( //find xheight +TO_ROW * row, /*current row */ +TBOX blobcoords[], /*blob bounding boxes */ +int lineheight, //initial guess +int init_lineheight, //block level guess +int blobcount, /*blobs in blobcoords */ +QSPLINE * baseline, /*established */ +float jumplimit /*min ascender height */ +); + +int *make_height_array ( //get array of heights +TBOX blobcoords[], /*blob bounding boxes */ +int blobcount, /*blobs in blobcoords */ +QSPLINE * baseline /*established */ +); + +void find_top_modes ( //get modes +STATS * stats, //stats to hack +int statnum, //no of piles +int modelist[], int modenum //no of modes to get +); + +void pick_x_height(TO_ROW * row, //row to do +int modelist[], +int lefts[], int rights[], +STATS * heightstat, +int mode_threshold); + +} // namespace tesseract + +#endif |