Analyze data and build structure 
• Sort all items in natural reading order 
–Items appear in PDF page content chaotically 
• Combine text items into lines  
• Combine lines into common structures 
–Paragraphs 
–Headers 
–Captions 
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Free VB.NET Guide to Render and Convert PDF Document to TIFF
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Analyze data and build structure.  
Combine lines into common structures 
PdfReader reader = new PdfReader("iText.Book.pdf"); 
PdfReaderContentParser parser = new 
PdfReaderContentParser(reader); 
RenderListener renderListener = 
parser.processContent(pageNum, new MyRenderListener()); 
List<Item> items = sort(renderListener.items); 
List<List<Item>> lines = getLines(items); 
List<List<List<Items>>> structures = 
getStructures(lines);  
highlight(structures, reader, pageNum, 
"./target/iText.Book.pdf"); 
reader.close(); 
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Analyze data and build structure.  
Combine lines into common structures 
PdfReader reader = new PdfReader("iText.Book.pdf"); 
PdfReaderContentParser parser = new 
PdfReaderContentParser(reader); 
RenderListener renderListener = 
parser.processContent(pageNum, new MyRenderListener()); 
List<Item> items = sort(renderListener.items); 
List<List<Item>> lines = getLines(items); 
List<List<List<Items>>> structures = 
getStructures(lines);  
highlight(structures, reader, pageNum, 
"./target/iText.Book.pdf"); 
reader.close(); 
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able to batch convert PDF documents to image formats in C#.NET. Support exporting PDF to multiple image forms, including Jpg, Png, Bmp, Gif, Tiff, Bitmap, .NET
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components for batch convert high resolution images from PDF. Convert PDF documents to multiple image formats, including Jpg, Png, Bmp, Gif, Tiff, Bitmap, .NET
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PDF structure recognition with iText.  
Done! 
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VB.NET Excel, VB.NET PowerPoint, VB.NET Tiff, VB.NET CSV file to adobe PDF converter component for Visual Studio Batch convert CSV formats to adobe PDF files.
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PDF structure recognition with iText. 
• Comments to example 
–Not all methods are exposed 
–Though structure is recognized we do not create tagged PDF here. 
We only highlight structure elements by color 
• Limitations 
–More difficult layouts (multi column text, tables etc.) are not handled 
in this example 
–If plain text, headers, captions use same styles output can be 
incorrect 
Real customer example. Live demo 
An iText project for GlobalSubmit, a health care service provider  
Examining the content of PDF documents with the goal to add 
interactive features such as links bookmarks and annotations 
PDF structure recognition in iText 
• Build structure recognition API on a top of PDF parsing API 
• Minimize user input for structure recognition 
• Support more element types: 
–Lists 
–Tables 
–TOCs 
• Support for complex layouts 
• Possibility to export recognized structure to different output 
formats 
For Europe, Middle-East, 
Asia and Africa 
Kerkstraat 108 
9050 Gentbrugge 
BELGIUM 
T: +32 92 98 02 31 
F: +32 92 70 33 75 
E: sales.isb@itextpdf.com  
Contact us! 
For the US, Canada,  
Latin-America and Oceania 
1 Broadway, 14th floor 
Cambridge, MA 02142 
USA 
T: +1 617 982 2646 
F: +1 617 982 2647 
E: sales.isc@itextpdf.com 
www.itextpdf.com  
iText technology 
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