PDFlib Text Extraction Toolkit (TET) Manual

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TeX documents. PDF documents produced with the TeX documents often contain numerical glyph names, Type 3 fonts and other features which prevent other products from successfully extracting the text. TET contains many heuristics and workarounds for dealing with such documents. However, a particular flavor of TeX documents can only be processed with a workaround that requires more processing time, and is disabled by default. You can enable more CPU-intensive font processing for these documents with the following document option: checkglyphlists=true 68 Chapter 5: Configuration
6 Text Extraction 6.1 PDF Document Domains PDF documents may contain text in many other places than only the page contents. While most applications deal with the page contents only, in many situations other document domains may be relevant as well. While the page contents can be retrieved with the workhorse functions TET_get_ text( ) and TET_get_image( ), the integrated pCOS interface plays a crucial role for retrieving text from other document domains. In the remaining section we provide information on domain searching with the TET library and TETML. In addition, we summarize how to search these document domains with Acrobat X/XI. This is important to locate search hits in Acrobat. Text on the page. Page contents are the main source of text in PDF. Text on a page is rendered with fonts and encoded using one of the many encoding techniques available in PDF. > How to display with Acrobat: page contents are always visible > How to search a single PDF with Acrobat X/XI: Edit, Find or Edit, [Advanced] Search. TET may be able to process the text in documents where Acrobat does not correctly map glyphs to Unicode values. In this situation you can use the TET Plugin which is based on TET (see Section 4.1, »Free TET Plugin for Adobe Acrobat«, page 43). The TET Plugin offers its own search dialog via Plug-Ins, PDFlib TET Plugin... TET Find. However, it is not intended as a full-blown search facility. > How to search multiple PDFs with Acrobat X/XI: Edit, [Advanced] Search and in Where would you like to search? select All PDF Documents in, and browse to a folder with PDF documents. > Sample code for the TET library: extractor mini sample > TETML element: /TET/Document/Pages/Page Predefined document info entries. Traditional document info entries are key/value pairs. > How to display with Acrobat X/XI: File, Properties... > How to search a single PDF with Acrobat X/XI: not available > How to search multiple PDFs with Acrobat X/XI: click Edit, [Advanced] Search and Show More Options near the bottom of the dialog. In the Look In: pull-down select a folder of PDF documents and in the pull-down menu Use these additional criteria select one of Date Created, Date Modified, Author, Title, Subject, Keywords. > Sample code for the TET library: dumper mini sample > TETML element: /TET/Document/DocInfo Custom document info entries. Custom document info entries can be defined in addition to the standard entries. > How to display with Acrobat X/XI: File, Properties..., Custom (not available in the free Adobe Reader) > How to search with Acrobat X/XI: not available 6.1 PDF Document Domains 69
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ABC Text Extraction Toolkit (TET) V
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Contents 0 First Steps with TET 7 0
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8.6 Restrictions and Caveats 121 9
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0.2 Applying the TET License Key Us
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Setting the license key with a TET
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CJK support. TET includes full supp
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The TET Plugin is a free extension
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new connector for the TIKA toolkit
Page 18 and 19: Table 2.1 TET command-line options
Page 20 and 21: 2.2 Constructing TET Command Lines
Page 22 and 23: Extract images from file.pdf in a r
Page 24 and 25: 3.2 C Binding TET is written in C w
Page 26 and 27: 3.3 C++ Binding Note For applicatio
Page 28 and 29: 3.4 COM Binding Installing the TET
Page 30 and 31: The following method of the String
Page 32 and 33: 3.7 Objective-C Binding Although th
Page 34 and 35: 3.8 Perl Binding The TET wrapper fo
Page 36 and 37: } catch (TETException $e) { print "
Page 38 and 39: 3.11 REALbasic Binding Installing t
Page 40 and 41: oot :to => "home#demo" > Edit app/c
Page 42 and 43: tion occurs, the job log shows the
Page 44 and 45: Acrobat provides only garbage when
Page 46 and 47: BUILD SUCCESSFUL Total time: 2 seco
Page 48 and 49: 4.3 TET Connector for the Solr Sear
Page 50 and 51: SQL> GRANT EXECUTE ON CTX_DOC TO HR
Page 52 and 53: 4.5 TET PDF IFilter for Microsoft P
Page 54 and 55: 4.6 TET Connector for the Apache TI
Page 56 and 57: 4.7 TET Connector for MediaWiki Med
Page 59 and 60: 5 Configuration 5.1 Extracting Cont
Page 61 and 62: 5.2 Resource Configuration and File
Page 63 and 64: product manually, make sure to use
Page 65 and 66: 5.3 Recommendations for common Scen
Page 67: Also to ensure text fidelity you ma
Page 71 and 72: How to display with Acrobat X: Tool
Page 73 and 74: 6.2 Page and Text Geometry Default
Page 75 and 76: width (x, y) beta fontsize baseline
Page 77 and 78: * Query ascender and descender valu
Page 79 and 80: 6.3 Chinese, Japanese, and Korean T
Page 81 and 82: Table 6.1 CJK compatibility decompo
Page 83 and 84: Since the PDF document may map pres
Page 85 and 86: Separator characters are inserted b
Page 87 and 88: this situation and recombines both
Page 89 and 90: Table 6.4 Document styles docstyle=
Page 91 and 92: 7 Advanced Unicode Handling 7.1 Imp
Page 93 and 94: Composite characters and sequences.
Page 95 and 96: 7.2.2 Filters for Granularity Word
Page 97 and 98: 7.3 Unicode Postprocessing TET offe
Page 99 and 100: Default foldings. Except for granul
Page 101 and 102: Compatibility decomposition. Charac
Page 103 and 104: In contrast, the following option l
Page 105 and 106: Table 7.7 Unicode normalization for
Page 107 and 108: 7.5 Unicode Mapping for Glyphs Whil
Page 109 and 110: Fig. 7.2 Sample font reports create
Page 111 and 112: glyphmapping {{fontname=Warnock* to
Page 113 and 114: 8 Image Extraction 8.1 Image Extrac
Page 115 and 116: 8.2 Image Merging and Filtering Ima
Page 117 and 118: 8.3 Placed Images and Image Resourc
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8.5 Geometry of Placed Images Using
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8.6 Restrictions and Caveats Image
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Various elements and attributes in
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c h e n 126 Chapter 9: TET Markup
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tet --tetml wordplus file.pdf With
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Object ’objects[49]/Subtype’ do
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Table 9.3 TETML elements and attrib
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9.4 Transforming TETML with XSLT Ve
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document containing the xml process
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[TheSansBold-Plain/13.98] 1 [TheSan
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10 TET Library API Reference 10.1 O
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List containing one option list wit
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Unicode sets. Unicode sets and can
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10.4 Geometric Types Rectangle. A r
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Table 10.2 Global options for TET_s
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10.6.2 Setup C TET *TET_new(void) C
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C++ int delete_pvf(wstring filename
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10.6.4 Unicode Conversion Function
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10.6.5 Exception Handling C++ wstri
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10.6.6 Logging The logging feature
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10.7 Document Functions C++ int ope
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Table 10.8 Document options for TET
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Table 10.8 Document options for TET
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Table 10.9 Suboptions for the glyph
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10.8 Page Functions C++ int open_pa
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Table 10.10 Page options for TET_op
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Table 10.11 Suboptions for the cont
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Table 10.12 Suboptions for the layo
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10.9 Text and Metrics Retrieval Fun
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Bindings C and C++ language binding
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10.10 Image Retrieval Functions C++
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C++ int write_image_file(int doc, i
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10.11 TET Markup Language (TETML) F
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Java and .NET language bindings: th
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estricted pCOS mode if nocopy=false
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10.12 pCOS Functions 191
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Image Retrieval Functions Function
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Index A annotations 71 API referenc
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TET command-line tool 17 TET connec
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