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Book Reading Interface: Book Reading Interface: Image Processing IssuesImage Processing Issues

J.Chetan, V.Sreekanth, Rakesh Babu J.Chetan, V.Sreekanth, Rakesh Babu

Vamshi Ambati and C.V.Jawahar Vamshi Ambati and C.V.Jawahar

International Institute of Information Technology International Institute of Information Technology

Hyderabad, IndiaHyderabad, India

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RequirementsRequirements

► UsabilityUsability Navigate through pagesNavigate through pages Easy and simple to useEasy and simple to use Pleasant to read imagesPleasant to read images

► AccessibilityAccessibility Serving low band-width usersServing low band-width users Resource aware Resource aware

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Images in Universal Images in Universal Digital LibraryDigital Library

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Image format in ULIBImage format in ULIB

► PROSPROS Archival quality imagesArchival quality images Good to reproduce in printGood to reproduce in print

► CONSCONS Huge size demands greater bandwidthHuge size demands greater bandwidth Requires third party apps to display onlineRequires third party apps to display online

► But…. But…. TIFF is not the only format to display imagesTIFF is not the only format to display images User does not need high resolution images all the User does not need high resolution images all the timetime

User may not need to see original scanned sizes of User may not need to see original scanned sizes of the images all the timethe images all the time

(Good enough vs Perfect images)(Good enough vs Perfect images)

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PNG v.s TIFFPNG v.s TIFF

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What are the What are the possibilities?possibilities?

►Store various formats of images at Store various formats of images at various resolutions (pre-compute)various resolutions (pre-compute) All possible resolutions/sizes may be All possible resolutions/sizes may be difficult to calculate ahead of timedifficult to calculate ahead of time

Requires more spaceRequires more space

►Perform on the fly conversion to Perform on the fly conversion to other formats and resolutionsother formats and resolutions We follow this approachWe follow this approach

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Book reading interfaceBook reading interface

►Image serverImage server►TIFF Plug-inTIFF Plug-in

►Book Reading InterfaceBook Reading Interface Real experience of reading bookReal experience of reading book Display thumbnail display for quick Display thumbnail display for quick browsingbrowsing

Printing and viewing the high Printing and viewing the high resolution TIFF imagesresolution TIFF images

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Statistics from Open Statistics from Open source Image Processing source Image Processing

LibrariesLibrariesLibraryLibrary Reading TimeReading Time

(in seconds)(in seconds) Writing TimeWriting Time

(in seconds)(in seconds)

Qimage (Qt) Qimage (Qt) 0. 0275290 0. 0275290 0. 128364 0. 128364

Libtiff Libtiff 0.3362845 0.3362845 0.385102 0.385102

ImageMagick ImageMagick 0.3172249 0.3172249 0.176223 0.176223

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Image Server Image Server

► On fly conversion of formats (PNG, On fly conversion of formats (PNG, JPEG, etc…)JPEG, etc…)

► ThumbnailsThumbnails► ResizingResizing► SmoothingSmoothing► ConfigurableConfigurable► Advantages:Advantages:

Takes care of Low band width peopleTakes care of Low band width people Other Applications (WAP)Other Applications (WAP) Open SourceOpen Source

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SmoothingSmoothing

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Anti-aliasing (future Anti-aliasing (future work)work)

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ArchitectureArchitecture

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StatisticsStatistics

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Screen shot of book Screen shot of book readerreader

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Screen shot of plug-inScreen shot of plug-in

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Thank youThank you

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