1 /********************************************************************** 2 * File: edgblob.h (Formerly edgeloop.h) 3 * Description: Functions to clean up an outline before approximation. 4 * Author: Ray Smith 5 * 6 * (C) Copyright 1991, Hewlett-Packard Ltd. 7 ** Licensed under the Apache License, Version 2.0 (the "License"); 8 ** you may not use this file except in compliance with the License. 9 ** You may obtain a copy of the License at 10 ** http://www.apache.org/licenses/LICENSE-2.0 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 * 17 **********************************************************************/ 18 19 #ifndef EDGBLOB_H 20 #define EDGBLOB_H 21 22 #include "coutln.h" // for C_OUTLINE 23 #include "ocrblock.h" // for BLOCK 24 #include "points.h" // for ICOORD 25 26 #include <vector> 27 28 namespace tesseract { 29 30 class OL_BUCKETS { 31 public: 32 OL_BUCKETS( // constructor 33 ICOORD bleft, // corners 34 ICOORD tright); 35 36 C_OUTLINE_LIST *operator()( // array access 37 TDimension x, // image coords 38 TDimension y); 39 // first non-empty bucket 40 C_OUTLINE_LIST *start_scan(); 41 // next non-empty bucket 42 C_OUTLINE_LIST *scan_next(); 43 int32_t count_children( // recursive sum 44 C_OUTLINE *outline, // parent outline 45 int32_t max_count); // max output 46 int32_t outline_complexity( // new version of count_children 47 C_OUTLINE *outline, // parent outline 48 int32_t max_count, // max output 49 int16_t depth); // level of recursion 50 void extract_children( // single level get 51 C_OUTLINE *outline, // parent outline 52 C_OUTLINE_IT *it); // destination iterator 53 54 private: 55 int16_t bxdim; // size of array 56 int16_t bydim; 57 std::vector<C_OUTLINE_LIST> buckets; // array of buckets 58 ICOORD bl; // corners 59 ICOORD tr; 60 decltype(buckets)::iterator it; // for extraction scan 61 62 C_OUTLINE_LIST *scan_next(decltype(buckets)::iterator it); 63 }; 64 65 void extract_edges(Image pix, // thresholded image 66 BLOCK *block); // block to scan 67 void outlines_to_blobs( // find blobs 68 BLOCK *block, // block to scan 69 ICOORD bleft, // block box //outlines in block 70 ICOORD tright, C_OUTLINE_LIST *outlines); 71 72 } // namespace tesseract 73 74 #endif 75