A fast an versatile Image Viewer Presentation of Thomas Scheffler - - PowerPoint PPT Presentation

a fast an versatile image viewer
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A fast an versatile Image Viewer Presentation of Thomas Scheffler - - PowerPoint PPT Presentation

Staff Mobility Week 2012 Bergen, 2012-05-08 A fast an versatile Image Viewer Presentation of Thomas Scheffler Thringer Universitts- und Landesbibliothek Jena (ThULB) Dienstag, 8. Mai 12 1 About me Thomas Scheffler 33 years old


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A fast an versatile Image Viewer

Presentation of Thomas Scheffler

Thüringer Universitäts- und Landesbibliothek Jena (ThULB)

Staff Mobility Week 2012 Bergen, 2012-05-08

1 Dienstag, 8. Mai 12

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About me

  • Thomas Scheffler
  • 33 years old
  • 2005 diploma in Computer Science at Jena University
  • since 2003 member of MyCoRe
  • since 2003 in ThULB IMS department
  • UrMEL-Team

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2 Dienstag, 8. Mai 12

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Where I work

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3 Dienstag, 8. Mai 12

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Key features of an online image viewer

  • display images
  • display images fast
  • orientation
  • navigation

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You are here

4 Dienstag, 8. Mai 12

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display images

  • Web browsers display different image file types

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Browser \ File types JPEG PNG GIF TIFF JPEG2000 Google Chrome Microsoft Internet Explorer Mozilla Firefox Opera Apple Safari Yes Yes Yes No No Yes Yes Yes Yes No Yes Yes Yes No No Yes Yes Yes No No Yes Yes Yes Yes Yes Browser \ File types JPEG PNG GIF major browsers Yes Yes Yes Browser \ File types JPEG major browsers Yes

5 Dienstag, 8. Mai 12

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  • Use TIFF for digitalisation and storage
  • Transform images into JPEG for users

display images

  • Web browsers display different image file types

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Browser \ File types JPEG TIFF JPEG2000 major browsers Yes No No preferred for long term preservation Browser \ File types JPEG major browsers Yes

6 Dienstag, 8. Mai 12

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SLIDE 7

Key features of an online image viewer

  • display images
  • display images fast
  • orientation
  • navigation

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You are here

7 Dienstag, 8. Mai 12

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display images fast

  • Size actually DOES matter
  • How to present large images fast?
  • Use different file type for presentation.

๏ Good point, compresses data without loosing much information

  • Use higher compression.

๏ Lossy compression lets you loose so many details. ๏ Looks really ugly.

  • Scale down to for instance to 100 dpi for presentation.

๏ Why scan at 600 dpi if you „loose“ so many details to the user?

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8 Dienstag, 8. Mai 12

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display images fast

  • Present large images in different zoom levels.
  • On smaller zoom level this decreases size of transmitted data.
  • Quick view (Is that the right image?)

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9 Dienstag, 8. Mai 12

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display images fast

  • Cut out image data.

๏ Only transmit data the user is actually going to see. ๏ Transmitted data does not depend on current

zoom level.

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10 Dienstag, 8. Mai 12

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display images fast

  • Make tiles and assemble on client side
  • Deliver image parts really quick
  • Tiles are cacheable
  • No computation on server side

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11 Dienstag, 8. Mai 12

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SLIDE 12

Key features of an online image viewer

  • display images
  • display images fast
  • orientation
  • navigation

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You are here

12 Dienstag, 8. Mai 12

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SLIDE 13
  • rientation
  • Highlight the cut out area.

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You are here

13 Dienstag, 8. Mai 12

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SLIDE 14
  • rientation
  • Provide scrollbars
  • High demand by our users
  • Users are used to the concept

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You are here

14 Dienstag, 8. Mai 12

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SLIDE 15

Key features of an online image viewer

  • display images
  • display images fast
  • orientation
  • navigation

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You are here

15 Dienstag, 8. Mai 12

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navigation

  • Just consider navigation inside a set of associated images.
  • For instance book pages:
  • We have pages in books.

๏ They are usually ordered.

→ Lets number them: 1 ... n

๏ Some pages have a label.

→ Display and user can jump to the 14th page that is labeled „3“.

  • Some books are structured in chapters and sections.

๏ „Pages“ are quite abstract. ๏ „First Act“ has more semantic than „3“.

  • Does not rely mainly on books (e.g. box of photos)
  • There is a standard that addresses this: METS
  • maintained by Library of Congress
  • XML
  • supports ORDER, LABEL and LOGICAL STRUCTURE

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16 Dienstag, 8. Mai 12

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Some links

  • Lecture of Martin Luther about the Galatians:

http://archive.thulb.uni-jena.de/hisbest/receive/HisBest_cbu_00005243

  • Some maps (estate of Delbrück):

http://archive.thulb.uni-jena.de/hisbest/receive/HisBest_cbu_00011796

  • METS Standard: http://www.loc.gov/standards/mets/
  • Image format support:

http://en.wikipedia.org/wiki/ Comparison_of_web_browsers#Image_format_support

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17 Dienstag, 8. Mai 12

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Bibliotheca Electoralis 1502-1547

18 Dienstag, 8. Mai 12

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Suggestions? Comments? Questions?

ThULB Jena Thomas Scheffler, UrMEL-Team Tel.: +49-3641-9-40027 Email: thomas.scheffler@uni-jena.de www.thulb.uni-jena.de

Finally, he finished his presentation

19 Dienstag, 8. Mai 12