1. IIIT Hyderabad - http://dli.iiit.ac.in/ 1 Book Reading Interface: Image Processing Issues J.Chetan, V.Sreekanth, Rakesh Babu Vamshi Ambati and C.V.Jawahar International Institute of Information Technology Hyderabad, India

2. IIIT Hyderabad - http://dli.iiit.ac.in/2 Requirements ► Usability  Navigate through pages  Easy and simple to use  Pleasant to read images ► Accessibility  Serving low band-width users  Resource aware

3. IIIT Hyderabad - http://dli.iiit.ac.in/3 Images in Universal Digital Library

4. IIIT Hyderabad - http://dli.iiit.ac.in/4 Image format in ULIB ► PROS  Archival quality images  Good to reproduce in print ► CONS  Huge size demands greater bandwidth  Requires third party apps to display online ► But….  TIFF is not the only format to display images  User does not need high resolution images all the time  User may not need to see original scanned sizes of the images all the time (Good enough vs Perfect images) (Good enough vs Perfect images)

5. IIIT Hyderabad - http://dli.iiit.ac.in/5 PNG v.s TIFF

6. IIIT Hyderabad - http://dli.iiit.ac.in/6 What are the possibilities? ► Store various formats of images at various resolutions (pre-compute)  All possible resolutions/sizes may be difficult to calculate ahead of time  Requires more space ► Perform on the fly conversion to other formats and resolutions  We follow this approach

7. IIIT Hyderabad - http://dli.iiit.ac.in/7 Book reading interface ► Image server ► TIFF Plug-in ► Book Reading Interface  Real experience of reading book  Display thumbnail display for quick browsing  Printing and viewing the high resolution TIFF images

8. IIIT Hyderabad - http://dli.iiit.ac.in/8 Statistics from Open source Image Processing Libraries Library Reading Time (in seconds) Writing Time (in seconds) Qimage (Qt) 0. 0275290 0. 128364 Libtiff Libtiff0.33628450.385102 ImageMagick0.31722490.176223

9. IIIT Hyderabad - http://dli.iiit.ac.in/9 Image Server ► On fly conversion of formats (PNG, JPEG, etc…) ► Thumbnails ► Resizing ► Smoothing ► Configurable ► Advantages:  Takes care of Low band width people  Other Applications (WAP)  Open Source

10. IIIT Hyderabad - http://dli.iiit.ac.in/10 Smoothing

11. IIIT Hyderabad - http://dli.iiit.ac.in/11 Anti-aliasing (future work)

12. IIIT Hyderabad - http://dli.iiit.ac.in/12 Architecture

13. IIIT Hyderabad - http://dli.iiit.ac.in/13 Statistics

14. IIIT Hyderabad - http://dli.iiit.ac.in/14 Screen shot of book reader

15. IIIT Hyderabad - http://dli.iiit.ac.in/15 Screen shot of plug-in

16. IIIT Hyderabad - http://dli.iiit.ac.in/ 16 Thank you http://dli.iiit.ac.inhttp://dli.iiit.ac.in/ http://dli.iiit.ac.in