![]() This option only appears if pages were selected prior to invoking the command. Selected: Sets the range to the current selection.The current page number will appear in parentheses, for example, Current (2) if page 2 is the current page. Current: Sets the range to the current page only.All Pages: Sets the range to all pages.To select a Page Range, click the Pages menu and select from the following: The CAD Drawing setting tends to ignore text formatting, for example, while the Text Document setting does not. Optimize for: Use to optimize the OCR process for the selected document type.Decreasing this value can increase speed, but might also cause larger text (for example, larger fonts) to be inadvertently ignored. Max Vector Size: Use to set the maximum vector size that will be analyzed during the OCR process any vectors larger than this setting will be discarded in pre-processing.If OCR is run on a PDF with no results, running it again with a Page Chunk Size of 1 can correct the problem. Note: Enabling Page Chunk Size and setting it to 1 is recommended for OCR jobs performed on PDFs that have a large number of pages, are of substantial file size or contain large format drawings. Increasing chunk size can increase speed, but will also consume more of the computer's resources. Page Chunk Size: Use to determine the maximum number of pages sent to the OCR engine at one time. Skip Vector Pages: Enable to skip processing of pages with vector content.Rotate Markups: If Correct Skew is enabled, use this option to also adjust existing markups so they line up with skew-corrected text or images.Detect Text in Pictures and Drawings: Enable to detect text in graphics.Detect Orientation: Enable to detect the page orientation (90, 180 and 270 degrees) of each page and correct it if needed.Correct Skew: Enable to correct angular deviations in scanned documents.Set the OCR Configuration options, as desired: Multiple libraries can be used on the same document. To remove a library, select it and click Remove. The American English library is loaded by default. The languages that will be used by the OCR process are shown under Recognition Languages.The OCR function will also be invoked when the Create PDF from Scanner or Camera function in Revu is used, opening the OCR dialog box automatically. Go to Document > OCR or press CTRL+SHIFT+O.Open the document on which OCR is to be run.For more information, see Zach Rowinski's assesssment. No THL staff have used this and we have no experience with it. To OCR roman text with diacritic characters, investigate using Abbyy's FineReader ( ). Be sure to check by doing a search on "the" or another word in the file and make sure it returns results. It will take some time, depending on the number of pages in the PDF. Pull down the Document menu, point to "OCR Text Recognition," and then point to "Recognize Text Using OCR…" and "start".Pull down the File menu, choose "Save as," and add "-ocr.pdf" to the file name.Then, to run OCR: open the PDF file you want to run OCR on.First rename the file then pull down the Document menu and select Optimize. For most PDFs, you want to run Optimize after you scan them.This is the process for running OCR on a PDF so that it is searchable, using Acrobat Professional: How to OCR a PDF Using Adobe Acrobat ProfessionalĬontributor(s): Scholars' Lab staff, Adriana Barcenas, Steven Weinberger, Zach Rowinski THL Toolbox > Scanning & OCR > How to OCR a PDF
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