| /////////////////////////////////////////////////////////////////////// |
| // File: leptonica_pageseg.h |
| // Description: Leptonica-based page segmenter. |
| // Author: Dan Bloomberg |
| // Created: Tue Aug 28 08:56:44 PDT 2007 |
| // |
| // (C) Copyright 2007, Google Inc. |
| // 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 LEPTONICA_PAGESEG_H |
| #define LEPTONICA_PAGESEG_H |
| |
| class Boxa; |
| class Pix; |
| class Pixa; |
| |
| class LeptonicaPageSeg { |
| public: |
| // GetHalftoneMask() |
| // Input: pixs (input image, assumed to be at 300 - 400 ppi) |
| // &pixht (returns halftone mask; can be NULL) |
| // &baht (returns boxa of halftone mask component b.b.s; can be NULL) |
| // &paht (returns pixa of halftone mask components; can be NULL) |
| // debugflag (set true to write out intermediate images) |
| // Return: true if ok, false on error |
| // Note: If there are no halftone regions, all requested data structures |
| // are returned as NULL. This is not an error. |
| static bool GetHalftoneMask(Pix *pixs, |
| Pix **ppixht, |
| Boxa **pbaht, |
| Pixa **ppaht, |
| bool debugflag); |
| |
| // GetTextlineMask() |
| // Input: pixs (input image, assumed to be at 300 - 400 ppi) |
| // &pixtm (returns textline mask; can be NULL) |
| // &pixvws (returns vertical whitespace mask; can be NULL) |
| // &batm (returns boxa of textline mask component b.b.s; can be NULL) |
| // &patm (returns pixa of textline mask components; can be NULL) |
| // debugflag (set true to write out intermediate images) |
| // Return: true if ok, false on error |
| static bool GetTextlineMask(Pix *pixs, |
| Pix **ppixtm, |
| Pix **ppixvws, |
| Boxa **pbatm, |
| Pixa **ppatm, |
| bool debugflag); |
| |
| // GetTextblockMask() |
| // Input: pixs (input image, assumed to be at 300 - 400 ppi) |
| // &pixtb (returns textblock mask; can be NULL) |
| // &batb (returns boxa of textblock mask component b.b; can be NULL) |
| // &patb (returns pixa of textblock mask components; can be NULL) |
| // debugflag (set true to write out intermediate images) |
| // Return: true if ok, false on error |
| // Notes: |
| // To obtain a set of polylines of the outer borders of each of the |
| // textblock regions, use pixGetOuterBordersPtaa(). |
| static bool GetTextblockMask(Pix *pixs, |
| Pix **ppixtb, |
| Boxa **pbatb, |
| Pixa **ppatb, |
| bool debugflag); |
| |
| // GetAllRegions() |
| // Input: pixs (input image, assumed to be at 300 - 400 ppi) |
| // &pixhm (returns halftone mask; can be NULL) |
| // &pixtm (returns textline mask; can be NULL) |
| // &pixtb (returns textblock mask; can be NULL) |
| // debugflag (set true to write out intermediate images and data) |
| // Return: true if ok, false on error |
| // Note: use NULL for input on each mask you don't want. |
| static bool GetAllRegions(Pix *pixs, |
| Pix **ppixhm, |
| Pix **ppixtm, |
| Pix **ppixtb, |
| bool debugflag); |
| }; |
| |
| #endif // LEPTONICA_PAGESEG_H |