![]() ![]() as described by Tilman Hausherr in his answer to "how to add unicode in truetype0font on pdfbox 2.0.0".ĭepending on the number of different fonts you have to create the mappings for, this approach might easily require way too much time and effort. You can try to interactively add manually created ToUnicode maps to the PDF, e.g. ![]() in your "PDF copy text issue-Text layer workaround.pdf" the header "Chapter 1: Derivative Securities" has been recognized as "Chapter1: Deratve Securites". Unless you have a contract with that source that requires them to supply the PDFs in a machine readable form or the source is otherwise obligated to do so, they usually will decline, though.ĭepending on the quality of the OCR software and the glyphs in the PDF, the results can be of a questionable quality e.g. There are multiple options, more or less feasible depending on your concrete case:Īsk the source of the PDF for a version that contains proper information for text extraction. The heuristics used by those programs differ relevantly and Okular's heuristics work best for your document. Your PDF does not contain the information required for the algorithm above from the PDF specification and That the different programs you tried returned so different results shows that This is where the text extraction implementations differ, they try to determine the matching Unicode value by using heuristics or information from beyond the PDF or applying OCR to the glyph in question. What happens if the algorithm above fails to produce a Unicode value If these methods fail to produce a Unicode value, there is no way to determine what the character code represents in which case a conforming reader may choose a character code of their choosing. In PDFs which don't contain the information required for text extraction, you eventually get to this point in the algorithm: It has been quoted very often in other stack overflow answers (see here, here, here, here, here, or here), so I won't quote it here again.Įssentially this is the algorithm used by Adobe Acrobat during copy&paste and also by many other text extractors. The PDF specification ISO 32000-1 (and similarly ISO 32000-2, too) describes an algorithm for mapping character codes to Unicode values using information available directly inside the PDF. Mapping character codes to Unicode as described in the PDF specification Depending on the exact nature of your task, you might try to add the required information to the existing text objects and fonts or you might go for OCR. The steps above will change your Adobe Printer Default Settings to accept and print fonts native to the document you are trying to create, instead of using Adobe's fonts to "re-create" the document leading to undesirable results.In short: The (original) PDF does not contain the information required for regular text extraction as described in the PDF specification. Your new preferences should be saved and your document should print in Adobe just like it looks on your screen in the original program. If Apply is available in the Adobe PDF Properties window, click it then click OK one more time to close the window and "X" out of everything else. You may have to click on APPLY once you get back to the Paper/Quality tab, then click on OK to close that window. Click on "NATIVE TRUETYPE."Ĭlick OK to close the pop-up window. Next, under DOCUMENT OPTIONS, click on POSTSCRIPT OPTIONS, TRUETYPE FONT DOWNLOAD OPTIONS: Click on "Automatic." A dropdown box will appear.Look for IMAGE COLOR MANAGEMENT, TRUE TYPE FONT: Click on the "Substitute with device font." A dropdown box will appear. Go back to Step 1 and Click on the PAPER/QUALITY tab, ADVANCED.Next, UN-CHECK "Rely on system fonts only, do not use document fonts." Click APPLY, OK Then under the Adobe PDF Settings tab click on DEFAULT, HIGH QUALITY PRINT.Click on START, DEVICES & PRINTERS, ADOBE PRINTER, PRINTER PROPERTIES, PREFERENCES.I was having a similar problem and the following fixed it for me (I'm using a Windows 7 Platform and Office 2010 Professional and was attempting to print a MapPoint Map to Adobe PDF in Adobe X.): It sounds like Adobe is attempting to use its default fonts instead of the document's fonts. If you can highlight a text string and copy/paste it. The following procedure, discovered by a Part III student, fixed this on MCS Windows and is worth trying if you have similar problems printing from other Windows machines. Open the PDF document in the Adobe Acrobat and try to select any text on the page with a selection tool. This is due to Adobe trying to re-create the document using its own fonts instead of the document's fonts. Sometimes a PDF file looks fine on screen but it prints in an unsightly substitute font which impedes reading, or symbols are replaced by small rectangles.
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