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Managing System Modules > Configuring modules > Configuring the optical character recognition (OCR) server
Configuring the optical character recognition (OCR) server
Administrator Help | TRITON AP-DATA | Version 8.3.x
Related topics:
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Adding or editing an OCR server
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Monitoring system health
The OCR server enables the system to analyze image files being sent through network channels, such as email attachments and Web posts. The server determines whether the images are textual, and if so, extracts and analyzes the text for sensitive content. There is no special attribute to configure within your policies. If sensitive text is found, the image is blocked or permitted according to your current policies.
The server can also be used to locate sensitive textual images during network discovery.
Note that handwriting is not supported; nor are images containing text that is skewed more than 10 degrees.
The OCR server is automatically included in supplemental TRITON AP-DATA server installations. To use optical character recognition, you must install a supplemental TRITON AP-DATA server.
To enable OCR analysis in your network:
1.
Navigate to the System Modules page and edit the policy engine on each server or agent that will receive traffic that you want analyzed. For example, edit the policy engine on Web Content Gateway if you'll be routing traffic through TRITON AP-WEB.
2.
In each Edit window, select Enable OCR and indicate which OCR server (supplemental TRITON AP-DATA server) to use to extract text from images.
When OCR is enabled, images are sent to that OCR server for text extraction.
This includes the following image types.
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JPEG_2000_JP2_File - JPEG-2000 JP2 File Format Syntax (ISO/IEC 15444-1) (.jp2, .j2k , .pgx)
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JBIG2- JBIG2 File Format(.jB2, .jbig2)
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MacPaint - MacPaint
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PC_Paintbrush - Paintbrush Graphics (PCX)
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BMP - Windows Bitmap
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JPEG_File_Interchange - JPEG Interchange Format
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PNG - Portable Network Graphics (PNG)
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GIF_87a - Graphics Interchange Format (GIF87a)
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GIF_89 - Graphics Interchange Format (GIF89a)
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TIFF - TIFF
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Scanned documents PDF - documents containing only scanned text.
All other PDF documents, including hybrid files containing both searchable text and scanned text, are sent to the default TRITON AP-DATA extractor, not the OCR server. Should the system fail to extract text from a PDF, it is forwarded to the OCR server.
 
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Tip 
If you have a PDF type that you want always routed to the OCR server, you can edit a configuration file known as, extractor.config.xml. Refer to this knowledgebase article for instructions.
The OCR server can analyze images that meet the following criteria:
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32,000 x 32,000 pixels or less
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300 DPI resolution for images with large text (10 point font and larger)
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400-600 DPI for images with small text (9 point font or smaller)
On the system modules page you can configure the languages to analyze and the fine-tune the module's accuracy profile to optimize performance.
To view the status of your OCR servers, select Main > Status > System Health.

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Managing System Modules > Configuring modules > Configuring the optical character recognition (OCR) server
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