Talk:DjVu
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I'm not sure what the intent of this sentence is: Once a PDF has been converted to DjVu, it becomes as good as an image and a text file bound together. "As good as" by what criteria? "Bound"? Maybe an example or rewording is in order, but I don't know what this is trying to express. --Ds13 15:13, 28 September 2006 (UTC)
[edit] formatted PDF document
*The DjVu media format cannot store formatted text. It just stores all the data in plain text and the text components are tagged to specific areas.
PDF can store formatted text. But it cannot be converted in easy way to source document. 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!
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. It is not possible to preserve formatted text using clipboard. So in my opinion it is not PDF adventage over DJVU.
Sorry, I was wrong. PDF file IS editable, with help from third-party software vendors (at least), like Foxit.
- PDF is an open standard (even if it was defined by Adobe). All you said are problems with the Adobe reader, not with the format. A correctly created PDF file (from original .tex source with .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. 143.106.18.169 16:49, 14 February 2007 (UTC)
[edit] conversion between djvu and pdf
Are there any tools for converting djvu files to PDF format? 217.132.202.109 15:27, 20 July 2007 (UTC)
PDF printing software could do the job 69.156.175.57 16:55, 31 October 2007 (UTC)
IrfanView + Djvu/PDF plugins is another option. --84.78.178.21 (talk) 22:32, 4 March 2008 (UTC)
[edit] on djvu vs pdf
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. 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.
The passage on djvu vs pdf is very confuse. Distinction must be made between TEXT, IMAGE and COMBINE MODE data. As mode of compression TEXT offer the best performance (while requiring thorough proofreading to ensure conversion process from OCR). For IMAGE many compression format are available, of which DjVu reach the top in his line. 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). It is for obvious reason the most heavier of the three. We may now compare our two format throught these category. 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. His IMAGE data are stored using jpeg compression which is less efficient then DjVu. Compare to a doc or txt format TEXT data in PDF are more difficult to edit and more tied to their page layout. DjVu format is not intend to store and display TEXT data but IMAGE data(though it support COMBINE MODE).
We could say that PDF is more of a container where DjVu is a compression format. Hence the theorical possibility of having PDF with image compress in DjVu
Wouldn't it be better to have a separate more general article called for instance "prints to digital" to explain these ?
On resizing
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. 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)
