Internet Archive BookReader

FR: contrast enhancement mode

Bug #280335 reported by raj
2
Affects Status Importance Assigned to Milestone
Internet Archive BookReader
Confirmed
Medium
mangtronix

Bug Description

since we are already doing some on-the-fly image processing on the cluster, add contrast enhancement for dan and bitonal for paul. might as well add greyscale too.

raj (raj-archive)
Changed in gnubook:
importance: Undecided → Wishlist
mangtronix (mang)
Changed in bookreader:
importance: Undecided → Wishlist
Revision history for this message
mangtronix (mang) wrote :

+1 from user report comparing this book viewed in different ways:

Half a Century, by Jane Grey Swisshelm (1880)
http://www.archive.org/stream/halfcenturygrey00swisrich#page/n5/mode/2up
  -- light, irregular, hard to read text

compared to
http://books.google.com/books?pg=PA162&dq=intitle:Half+intitle:a+intitle:century+inauthor:swisshelm&ei=r_otTLyTO8vsnQfDrMT8Aw&ct=result&id=Ptl2AAAAMAAJ#v=onepage&q&f=false
quite uniform and readable

DjVu:
http://ia361301.us.archive.org//load_djvu_applet.php?file=5/items/halfcenturygrey00swisrich/halfcenturygrey00swisrich.djvu
terrific

Changed in bookreader:
assignee: nobody → mangtronix (mang)
status: New → Confirmed
Revision history for this message
mangtronix (mang) wrote :

The text legibility could also likely be improved by using a better scaling algorithm.

Changed in bookreader:
importance: Wishlist → Medium
mangtronix (mang)
summary: - FR: contrast enhancement mode
+ FR: contrast enhancement mode / improve text image quality
summary: - FR: contrast enhancement mode / improve text image quality
+ FR: contrast enhancement mode
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