![]() DjVu files are the most common on Wikisource but PDFs can also be used. You can either scan a book yourself or find a scan that someone else has already made. Preceding unsigned comment added by 129.177.44.See also: Wikisource:Sources and Help:Digitising texts and images for Wikisource 129.15.131.245 ( talk) 09:30, 19 October 2008 (UTC) That's most likely because by the time you've seen the article, the comparison section has already been removed. That's hardly great detail, and even hardlier the majority of the article. The only part of the article that describes the differences between DjVu and PDF is as follows:ĭjVu has been promoted as an alternative to PDF, as it gives smaller files than PDF for most scanned documents. Preceding unsigned comment added by 129.177.44.106 ( talk) 09:22, 18 October 2008 (UTC) I'm not sure what you're talking about. If it's considered valuable information, I think it's better placed in a separate article anyway, and not in DjVu or PDF. I think I'm going to go ahead and just remove that section. Is this an article on the DjVu format or just a semi-biased PDF-DjVu comparison? The article should focus on what DjVu is (a format primarily designed for *scanned* documents, so the comparison with vector formats is useless) and where it's being used, instead of discussing in great detail why PDF is or is not better than DjVu. ![]() So it more depends on the kind of data you have at first then with the PDF or DjVu format (though DjVu only support the IMAGE data while PDF support TEXT, IMAGE and VECTOR) 69.156.175.57 16:55, 31 October 2007 (UTC) -Preceding unsigned comment added by 69.156.175.57 ( talk) 16:12, 31 October 2007 (UTC) ![]() Resizing without making pixel visible depends on which kind of data you have IMAGE, TEXT or VECTOR, the later two allowing scaling without the former flaws. Wouldn't it be better to have a separate more general article called for instance "prints to digital" to explain these ? Hence the theorical possibility of having PDF with image compress in DjVu We could say that PDF is more of a container where DjVu is a compression format. DjVu format is not intend to store and display TEXT data but IMAGE data(though it support COMBINE MODE). Compare to a doc or txt format TEXT data in PDF are more difficult to edit and more tied to their page layout. His IMAGE data are stored using jpeg compression which is less efficient then DjVu. Actually PDF do support both TEXT or IMAGE separately or in COMBINE MODE which difference will determine the size of the file at the end. We may now compare our two format throught these category. It is for obvious reason the most heavier of the three. The one I call COMBINE MODE is where TEXT data (which are gather from a quite rought OCR) are held under the IMAGE data to allow search, copy, and so on (of our imperfect TEXT data). For IMAGE many compression format are available, of which DjVu reach the top in his line. As mode of compression TEXT offer the best performance (while requiring thorough proofreading to ensure conversion process from OCR). Distinction must be made between TEXT, IMAGE and COMBINE MODE data. The passage on djvu vs pdf is very confuse. And, furthermore my english is pretty limited so I hope someone can check those fact and correct my english mistake and published it in the main article if it feels needed. I posted this in the comment section as, first, I didnt check any of the following which derive formely from my use of the two format. eps images) will always be editable, selectable, printable in arbitrary resolution, and will have a smaller file size than a DjVu for the same situation. A correctly created PDF file (from original. All you said are problems with the Adobe reader, not with the format. PDF is an open standard (even if it was defined by Adobe). PDF file IS editable, with help from third-party software vendors (at least), like Foxit. So in my opinion it is not PDF adventage over DJVU. It is not possible to preserve formatted text using clipboard. Only minor text edits can be done using expensive Adobe software and if document contains any tables, it is not possible to modify it in an acceptable way. ![]() Moreover, text from many PDF documents cannot be even copied to clipboard! Many times in order to preserve formatting PDF document must be OCRed just like DJVU! But it cannot be converted in easy way to source document. It just stores all the data in plain text and the text components are tagged to specific areas. *The DjVu media format cannot store formatted text. ![]()
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