Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/ccstruct/normalis.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 /**********************************************************************
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2 * File: normalis.h (Formerly denorm.h)
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3 * Description: Code for the DENORM class.
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4 * Author: Ray Smith
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5 *
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6 * (C) Copyright 1992, Hewlett-Packard Ltd.
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7 ** Licensed under the Apache License, Version 2.0 (the "License");
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8 ** you may not use this file except in compliance with the License.
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9 ** You may obtain a copy of the License at
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10 ** http://www.apache.org/licenses/LICENSE-2.0
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11 ** Unless required by applicable law or agreed to in writing, software
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12 ** distributed under the License is distributed on an "AS IS" BASIS,
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13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 ** See the License for the specific language governing permissions and
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15 ** limitations under the License.
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16 *
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17 **********************************************************************/
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19 #ifndef NORMALIS_H
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20 #define NORMALIS_H
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22 #include "image.h"
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24 #include <tesseract/export.h>
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26 #include <vector>
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28 struct Pix;
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30 namespace tesseract {
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32 const int kBlnCellHeight = 256; // Full-height for baseline normalization.
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33 const int kBlnXHeight = 128; // x-height for baseline normalization.
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34 const int kBlnBaselineOffset = 64; // offset for baseline normalization.
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36 class BLOCK;
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37 class FCOORD;
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38 class TBOX;
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39 class UNICHARSET;
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41 struct TBLOB;
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42 struct TPOINT;
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44 // Possible normalization methods. Use NEGATIVE values as these also
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45 // double up as markers for the last sub-classifier.
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46 enum NormalizationMode {
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47 NM_BASELINE = -3, // The original BL normalization mode.
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48 NM_CHAR_ISOTROPIC = -2, // Character normalization but isotropic.
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49 NM_CHAR_ANISOTROPIC = -1 // The original CN normalization mode.
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50 };
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52 class TESS_API DENORM {
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53 public:
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54 DENORM();
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56 // Copying a DENORM is allowed.
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57 DENORM(const DENORM &);
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58 DENORM &operator=(const DENORM &);
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59 ~DENORM();
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61 // Setup the normalization transformation parameters.
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62 // The normalizations applied to a blob are as follows:
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63 // 1. An optional block layout rotation that was applied during layout
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64 // analysis to make the textlines horizontal.
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65 // 2. A normalization transformation (LocalNormTransform):
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66 // Subtract the "origin"
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67 // Apply an x,y scaling.
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68 // Apply an optional rotation.
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69 // Add back a final translation.
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70 // The origin is in the block-rotated space, and is usually something like
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71 // the x-middle of the word at the baseline.
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72 // 3. Zero or more further normalization transformations that are applied
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73 // in sequence, with a similar pattern to the first normalization transform.
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74 //
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75 // A DENORM holds the parameters of a single normalization, and can execute
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76 // both the LocalNormTransform (a forwards normalization), and the
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77 // LocalDenormTransform which is an inverse transform or de-normalization.
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78 // A DENORM may point to a predecessor DENORM, which is actually the earlier
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79 // normalization, so the full normalization sequence involves executing all
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80 // predecessors first and then the transform in "this".
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81 // Let x be image coordinates and that we have normalization classes A, B, C
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82 // where we first apply A then B then C to get normalized x':
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83 // x' = CBAx
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84 // Then the backwards (to original coordinates) would be:
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85 // x = A^-1 B^-1 C^-1 x'
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86 // and A = B->predecessor_ and B = C->predecessor_
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87 // NormTransform executes all predecessors recursively, and then this.
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88 // NormTransform would be used to transform an image-based feature to
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89 // normalized space for use in a classifier
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90 // DenormTransform inverts this and then all predecessors. It can be
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91 // used to get back to the original image coordinates from normalized space.
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92 // The LocalNormTransform member executes just the transformation
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93 // in "this" without the layout rotation or any predecessors. It would be
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94 // used to run each successive normalization, eg the word normalization,
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95 // and later the character normalization.
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96
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97 // Arguments:
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98 // block: if not nullptr, then this is the first transformation, and
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99 // block->re_rotation() needs to be used after the Denorm
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 // transformation to get back to the image coords.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
101 // rotation: if not nullptr, apply this rotation after translation to the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102 // origin and scaling. (Usually a classify rotation.)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
103 // predecessor: if not nullptr, then predecessor has been applied to the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 // input space and needs to be undone to complete the inverse.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 // The above pointers are not owned by this DENORM and are assumed to live
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 // longer than this denorm, except rotation, which is deep copied on input.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 //
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 // x_origin: The x origin which will be mapped to final_xshift in the result.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109 // y_origin: The y origin which will be mapped to final_yshift in the result.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
110 // Added to result of row->baseline(x) if not nullptr.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
111 //
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 // x_scale: scale factor for the x-coordinate.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
113 // y_scale: scale factor for the y-coordinate. Ignored if segs is given.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
114 // Note that these scale factors apply to the same x and y system as the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
115 // x-origin and y-origin apply, ie after any block rotation, but before
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
116 // the rotation argument is applied.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
117 //
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
118 // final_xshift: The x component of the final translation.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
119 // final_yshift: The y component of the final translation.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
120 //
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
121 // In theory, any of the commonly used normalizations can be setup here:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
122 // * Traditional baseline normalization on a word:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
123 // SetupNormalization(block, nullptr, nullptr,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
124 // box.x_middle(), baseline,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
125 // kBlnXHeight / x_height, kBlnXHeight / x_height,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
126 // 0, kBlnBaselineOffset);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
127 // * "Numeric mode" baseline normalization on a word, in which the blobs
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
128 // are positioned with the bottom as the baseline is achieved by making
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
129 // a separate DENORM for each blob.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
130 // SetupNormalization(block, nullptr, nullptr,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
131 // box.x_middle(), box.bottom(),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
132 // kBlnXHeight / x_height, kBlnXHeight / x_height,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
133 // 0, kBlnBaselineOffset);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
134 // * Anisotropic character normalization used by IntFx.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
135 // SetupNormalization(nullptr, nullptr, denorm,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
136 // centroid_x, centroid_y,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 // 51.2 / ry, 51.2 / rx, 128, 128);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 // * Normalize blob height to x-height (current OSD):
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
139 // SetupNormalization(nullptr, &rotation, nullptr,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
140 // box.rotational_x_middle(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
141 // box.rotational_y_middle(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
142 // kBlnXHeight / box.rotational_height(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 // kBlnXHeight / box.rotational_height(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
144 // 0, kBlnBaselineOffset);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
145 // * Secondary normalization for classification rotation (current):
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146 // FCOORD rotation = block->classify_rotation();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
147 // float target_height = kBlnXHeight / CCStruct::kXHeightCapRatio;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
148 // SetupNormalization(nullptr, &rotation, denorm,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
149 // box.rotational_x_middle(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 // box.rotational_y_middle(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
151 // target_height / box.rotational_height(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
152 // target_height / box.rotational_height(rotation),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
153 // 0, kBlnBaselineOffset);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
154 // * Proposed new normalizations for CJK: Between them there is then
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
155 // no need for further normalization at all, and the character fills the cell.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 // ** Replacement for baseline normalization on a word:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157 // Scales height and width independently so that modal height and pitch
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
158 // fill the cell respectively.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
159 // float cap_height = x_height / CCStruct::kXHeightCapRatio;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
160 // SetupNormalization(block, nullptr, nullptr,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 // box.x_middle(), cap_height / 2.0f,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 // kBlnCellHeight / fixed_pitch,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 // kBlnCellHeight / cap_height,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 // 0, 0);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
165 // ** Secondary normalization for classification (with rotation) (proposed):
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 // Requires a simple translation to the center of the appropriate character
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 // cell, no further scaling and a simple rotation (or nothing) about the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
168 // cell center.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
169 // FCOORD rotation = block->classify_rotation();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
170 // SetupNormalization(nullptr, &rotation, denorm,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
171 // fixed_pitch_cell_center,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 // 0.0f,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173 // 1.0f,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
174 // 1.0f,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 // 0, 0);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 void SetupNormalization(const BLOCK *block, const FCOORD *rotation, const DENORM *predecessor,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177 float x_origin, float y_origin, float x_scale, float y_scale,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
178 float final_xshift, float final_yshift);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
179
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
180 // Sets up the DENORM to execute a non-linear transformation based on
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 // preserving an even distribution of stroke edges. The transformation
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 // operates only within the given box, scaling input coords within the box
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 // non-linearly to a box of target_width by target_height, with all other
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 // coords being clipped to the box edge. As with SetupNormalization above,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
185 // final_xshift and final_yshift are applied after scaling, and the bottom-
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186 // left of box is used as a pre-scaling origin.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
187 // x_coords is a collection of the x-coords of vertical edges for each
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 // y-coord starting at box.bottom().
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
189 // y_coords is a collection of the y-coords of horizontal edges for each
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 // x-coord starting at box.left().
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 // Eg x_coords[0] is a collection of the x-coords of edges at y=bottom.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 // Eg x_coords[1] is a collection of the x-coords of edges at y=bottom + 1.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 // The second-level vectors must all be sorted in ascending order.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194 void SetupNonLinear(const DENORM *predecessor, const TBOX &box, float target_width,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 float target_height, float final_xshift, float final_yshift,
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196 const std::vector<std::vector<int>> &x_coords,
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197 const std::vector<std::vector<int>> &y_coords);
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198
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199 // Transforms the given coords one step forward to normalized space, without
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parents:
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200 // using any block rotation or predecessor.
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201 void LocalNormTransform(const TPOINT &pt, TPOINT *transformed) const;
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parents:
diff changeset
202 void LocalNormTransform(const FCOORD &pt, FCOORD *transformed) const;
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203 // Transforms the given coords forward to normalized space using the
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parents:
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204 // full transformation sequence defined by the block rotation, the
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parents:
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205 // predecessors, deepest first, and finally this. If first_norm is not
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206 // nullptr, then the first and deepest transformation used is first_norm,
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207 // ending with this, and the block rotation will not be applied.
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diff changeset
208 void NormTransform(const DENORM *first_norm, const TPOINT &pt, TPOINT *transformed) const;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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209 void NormTransform(const DENORM *first_norm, const FCOORD &pt, FCOORD *transformed) const;
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210 // Transforms the given coords one step back to source space, without
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parents:
diff changeset
211 // using to any block rotation or predecessor.
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parents:
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212 void LocalDenormTransform(const TPOINT &pt, TPOINT *original) const;
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213 void LocalDenormTransform(const FCOORD &pt, FCOORD *original) const;
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parents:
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214 // Transforms the given coords all the way back to source image space using
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215 // the full transformation sequence defined by this and its predecessors
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216 // recursively, shallowest first, and finally any block re_rotation.
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217 // If last_denorm is not nullptr, then the last transformation used will
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218 // be last_denorm, and the block re_rotation will never be executed.
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parents:
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219 void DenormTransform(const DENORM *last_denorm, const TPOINT &pt, TPOINT *original) const;
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parents:
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220 void DenormTransform(const DENORM *last_denorm, const FCOORD &pt, FCOORD *original) const;
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parents:
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221
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parents:
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222 // Normalize a blob using blob transformations. Less accurate, but
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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223 // more accurately copies the old way.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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224 void LocalNormBlob(TBLOB *blob) const;
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225
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parents:
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226 // Fills in the x-height range accepted by the given unichar_id in blob
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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227 // coordinates, given its bounding box in the usual baseline-normalized
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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228 // coordinates, with some initial crude x-height estimate (such as word
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parents:
diff changeset
229 // size) and this denoting the transformation that was used.
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parents:
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230 // Also returns the amount the character must have shifted up or down.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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231 void XHeightRange(int unichar_id, const UNICHARSET &unicharset, const TBOX &bbox, float *min_xht,
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parents:
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232 float *max_xht, float *yshift) const;
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233
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parents:
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234 // Prints the content of the DENORM for debug purposes.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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235 void Print() const;
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236
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
237 Image pix() const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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238 return pix_;
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239 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
240 void set_pix(Image pix) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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241 pix_ = pix;
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parents:
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242 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
243 bool inverse() const {
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parents:
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244 return inverse_;
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245 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
246 void set_inverse(bool value) {
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parents:
diff changeset
247 inverse_ = value;
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248 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
249 const DENORM *RootDenorm() const {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
250 if (predecessor_ != nullptr) {
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parents:
diff changeset
251 return predecessor_->RootDenorm();
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252 }
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parents:
diff changeset
253 return this;
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254 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
255 const DENORM *predecessor() const {
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parents:
diff changeset
256 return predecessor_;
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parents:
diff changeset
257 }
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parents:
diff changeset
258 // Accessors - perhaps should not be needed.
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parents:
diff changeset
259 float x_scale() const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
260 return x_scale_;
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parents:
diff changeset
261 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
262 float y_scale() const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
263 return y_scale_;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
264 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
265 const BLOCK *block() const {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
266 return block_;
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parents:
diff changeset
267 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
268 void set_block(const BLOCK *block) {
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parents:
diff changeset
269 block_ = block;
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parents:
diff changeset
270 }
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parents:
diff changeset
271
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parents:
diff changeset
272 private:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
273 // Free allocated memory and clear pointers.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
274 void Clear();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
275 // Setup default values.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
276 void Init();
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parents:
diff changeset
277
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
278 // Best available image.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
279 Image pix_;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
280 // True if the source image is white-on-black.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
281 bool inverse_;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
282 // Block the word came from. If not null, block->re_rotation() takes the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
283 // "untransformed" coordinates even further back to the original image.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
284 // Used only on the first DENORM in a chain.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
285 const BLOCK *block_;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
286 // Rotation to apply between translation to the origin and scaling.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
287 const FCOORD *rotation_;
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parents:
diff changeset
288 // Previous transformation in a chain.
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parents:
diff changeset
289 const DENORM *predecessor_;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
290 // Non-linear transformation maps directly from each integer offset from the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
291 // origin to the corresponding x-coord. Owned by the DENORM.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
292 std::vector<float> *x_map_;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
293 // Non-linear transformation maps directly from each integer offset from the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
294 // origin to the corresponding y-coord. Owned by the DENORM.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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295 std::vector<float> *y_map_;
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296 // x-coordinate to be mapped to final_xshift_ in the result.
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297 float x_origin_;
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298 // y-coordinate to be mapped to final_yshift_ in the result.
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299 float y_origin_;
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300 // Scale factors for x and y coords. Applied to pre-rotation system.
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301 float x_scale_;
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302 float y_scale_;
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303 // Destination coords of the x_origin_ and y_origin_.
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304 float final_xshift_;
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305 float final_yshift_;
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306 };
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307
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308 } // namespace tesseract
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309
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310 #endif