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| [[image:ocr reader.png|frame|The OCR Reader post processor selected on a Data Type's property panel.]] | | #REDIRECT [[2.90:OCR Reader (Result Post Processor)]] |
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| <blockquote style="font-size:14pt">
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| The '''OCR Reader''' post processor allows you to run additional OCR on a region nearby a label (which has been returned as the result of a Data Type extractor) and return the OCR'd text.
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| </blockquote>
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| This is especially useful on documents where data is printed in a special font, or even when the label and value fonts are different entirely.
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| This region can be relative to the initial Data Type extractor's result, or be configured to automatically "snap" to a bounding box.
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| <br clear = all>
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| == Example ==
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| We want to extract key values from a form. The problem is that this form contains mixed fonts, and the values we want are displayed in the OCR-A font, which is sometimes troublesome for standard OCR engines.
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| [[image:1555438762302-330.png]]
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| The idea for this scenario is to first extract the label for the value we want using a Data Type extractor <code>2. First Name</code>, and then set the "Post Processing" property of that Data Type to run a special OCR Profile designed to extract the value associated with the label <code>Benjamin</code>.
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| === Steps ===
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| <tabs>
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| <tab name="Step 1">
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| ===== Create the Data Type =====
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| First, we want to create the "Data Type" that will extract the label with the following "Pattern".
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| <code>(\d\.\s)?first name</code>
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| [[image:ocrpp001.png|center]]
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| </tab>
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| <tab name="Step 2">
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| ===== Enable the Post Processor =====
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| In the "Output" section of the Data Type, we'll set the "Post Processing" property to "OCR Reader".
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| [[image:ocrpp002.png|center]]
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| </tab>
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| <tab name="Step 3">
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| ===== Configure the Post Processor =====
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| Once we've chosen "OCR Reader", we can expand it to reveal its configurable properties.
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| * Set the '''OCR Profile''' to a profile designed specifically to deal with OCR-A fonts.
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| * Set '''Auto Snap Distance''' to "1.5in".
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| * Set '''Auto Snap Margin''' to "1pt, 12pt, 2pt, 1pt".
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| * Set '''Output Full Region''' to "True".
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| [[image:ocrpp003.png|center]]
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| </tab>
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| <tab name="Step 4">
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| ===== Test Extraction =====
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| Once we Save and Run Extraction, the "Post Processor" runs after the initial pattern (the one that finds the label), OCRs the region we defined, and outputs our value: <code>Benjamin</code>.
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| [[image:ocrpp004.png|center]]
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| </tab>
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| </tabs>
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| == Properties ==
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| {|cellpadding="10" cellspacing="5"
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| |-style="background-color:#ddf5f5"
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| |OCR Profile||The OCR Profile to use for character extraction.
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| |-style="background-color:#ddf5f5"
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| |Region||Specifies a region, relative to each output instance, where OCR should be performed.
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| |-style="background-color:#ddf5f5"
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| |Auto Snap Distance||Specifies the maximum distance for an auto snap operation, which automatically aligns the edges of the zone to lines on the document.
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| |-style="background-color:#ddf5f5"
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| |Auto Snap Margin||When the auto snap feature is in use, specifies an additional amount to shrink the zone on each edge.
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| |-style="background-color:#ddf5f5"
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| |Value Extractor||An optional extractor to be executed against the OCR content.
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| |-style="background-color:#ddf5f5"
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| |Line Separator||When capturing multiple lines of text, specifies how line breaks will be represented in the output.
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| |-style="background-color:#ddf5f5"
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| |Output Full Region||Specifies whether the highlight region of each output instance will reflect the full OCR area, or only the area containing text.
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