Djvu or pdf files? Which is better? Pdf or Djvu?

Strengths of PDF format.

  • Text 
  • Graphics with a given degree of compression. Easily removed without loss of quality in the individual bitmaps. 
  • Ability to store in one container file formats are different. 
  • Hyperlinks, etc. 

Weaknesses PDF file format.

  • The size of files containing bitmap images 
  • If you use compression jb2 (analogue of deja vu-compression), then when you open the downloaded files are very Comp. For example, the work of Google with the books, such tight compression, very uncomfortable - the Athlon 64 3000 +, and scrolled such books with obvious snubs. 

Strengths DJVU file format. 

  • Size. With good contrast scan in the amount of savings compared to Tiff G4 - to 5-7, sometimes up to 10 times. A color image of good quality can also be condensed with virtually no loss of visual quality at 5-10 times compared with jpg files. Huge maps (for example 8000x6000 points) converting up to 200 kilobytes, and thus readable. 
  • Text layer can be integrated into deja vu. However, at the touch of a button "do not, want dop.soft. 
  • Hyperlinks 
  • It is "easy" even for the slow compon. 

 

Weaknesses DJVU file format. 

  • Can make mistakes when coding (the substitution of "H" - "N" and other similar). Typically, this is associated with poor quality sources (resolution less than 300 dpi) and "aggressive" settings profile encoding. Scan at 400dpi and "normal" installation problems with the substitution of symbols do not create. 
  • -Before the conversion of scanned images they need treatment, otherwise deteriorates the quality djvu-images. 

I do not see any problem in that for a single book to create both files and PDF, DJVU and not engage in disputes with "religious" subjects who are better and stronger than an elephant or a whale. 

 

I myself because of the "lightness" when viewing prefer deja vu. 
Many people still pay for the downloaded megabytes, and for them djvu so far just a panacea. When the situation changes on connect, deja vu certainly lose part of its popularity.