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- To specify whether text on an image with low resolution is recognized, enable Low Resolution Mode. This is useful when recognizing documents such as faxes or ones with poor print quality.
Advanced KeyFree Settings
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- Remove Garbage – Removes excess dots that are smaller than a certain size from the image during objects extraction (despeckle).
- Remove Texture – Temporarily remove the background noise during OCR which might interfere with text recognition.
- Detect Matrix Printer – If the source document was produced on a dot-matrix printer, use this option to interpret the text more accurately.
- Detect Porous Text – Detect regions of the document with “porous” text.
- Detect Text On Pictures – If the document has text on an image or colored background, use this selection to increase the contrast between the image and the text.
- Enable Aggressive Text Extraction – Enables the OCR engine to attempt to extract as much text on the image as possible. This is useful when the image contains some low-quality text, (although it may still require manual correction).
- Fast Objects Extraction – When speed is required more than a high level of OCR accuracy, select this setting.
- Prohibit Color Image – For the OCR engine to skip text laid over an image or colored background and only scan the black-and-white text.
- Remove Garbage – Removes excess dots that are smaller than a certain size from the image during objects extraction (despeckle).
- Specify how to reuse the text and image layers of the source PDF file by selecting from the PDF Layer Reuse Mode drop-down list. Do not use this setting if the source file contains only raster-based data, such as image-only PDF files.
- Auto – Have the OCR engine use both text and image layers. This is useful in most cases.
- Do Not Reuse – Do not reuse the text layer which exists in the PDF file.
- Content Only – For the OCR engine use only text layers in the PDF file, if they exist.
- Auto – Have the OCR engine use both text and image layers. This is useful in most cases.
