don't support Unicode? #3563
Replies: 3 comments 7 replies
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if its aPDF its usually not Unicode unless using future PDF format most PDF use legacy PDF based ansi or UTF16 as hex or any other encoding but never UTF-8 thus windows copy and paste as UTF-8 is rarely good for non Plain American Character text. It depends what and how it was stored, as to how well it extracts in any application |
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I can't take any action to modify the PDF I got; in this case how do I figure it out? |
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too many slow links to China ?
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OK I found it (Object 2,148) but you can see its not human text the problem is that any extractor can only see something like this where that font is /C0_3 but here as 1 em high it makes no sense at all note this is not that exact string but a 6 character one where AA 36 9 4 68 E6 89 could be any thing at all English, Martian or possibly Chinese |
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Thanks! So I think it's problem of this PDF, and nothing to do in (any) reader. |
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As a Printout it is not a wrong PDF just no use for a blind person since those sounds do not look like normal words, PDF is designed for visual print out not for extraction of the components. |
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in this case it's better to use OCR to recognize the text |
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OCR is of limited value since it can only "Gusse" the single letters based on a Dictionary of known words. Hence usually abysmal for strings of numbers (it sees as random digits) or here Chinese (Eastern languages such as Arabic around the world to Japanese) unless the dictionary looks as pairs of ordered characters like word groups. It is always best to try to decode the binary so here those 3 "letters" are in order |
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Some OCR tools claim to support Chinese (such as https://ocr.space/). I haven't tried that myself, but maybe it can help the OP. |
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@dungsaga you can try with that section (most of the others will not be a problem in SumatraPDF, but I forget which page "Haunt" is on but the file should be 7th JULY https://cultureexpress.taipei/PublicationEbookViewer/C000007/de559bef-1117-4822-99c1-fe8b5eb7dcbe |
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I tried to copy (Chinese) text in a PDF but get garbled result
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