Introduction
Issues of validation, compression and preservation become more important in image management as collections grow in size and complexity. On one hand compression is seen as a necessary requirement to deal with the scale of the collection on order to make preservation a practical reality, but preservation advice generally discourages compression which is seen as a preservation risk. Validation is essential for quality assurance in the development of large collections and is a necessary component in the development of a preservation plan: but adds another process in our workflows thus, adding complexity an expense. So how to compress without risking loss? How to validate without adding complexity and expense? How to preserve with limited storage capacities? Underlying these issues are developments related to JPEG2000 (JP2K). This is an open standard for the compression of images. Because it can offer visually lossless compression JP2k can have a dramatic impact on access and distribution of images. Moreover it can have a dramatic effect on storage requirements for image collections, reducing these by an order of magnitude when compared to uncompressed TIFF. Therefore it has also been proposed as an archival format, especially in the context of large scale digitisation projects.
The first part of the JP2K standard was published in 2000 and a range components have been proposed to extend the standard, such as functionality for compound image files, encryption, motion picture, conformance testing. In its complete form JP2K represents a sophisticated and flexible open standard which has considerable potential for digital libraries and archives, digitisation and digital photography. In 2008 the DPC published a seminal Technology Watch Report on the standard introducing it to the digital preservation community and encouraging the development of archival uses of JP2K. Nonetheless, uptake of the JP2K has been modest. While a small but influential set of repositories have adopted JP2K in preference to TIFF, TIFF remains the preferred choice in many repositories partly because of an intrinsic suspicion of compression among preservation specialists. The relative dearth of tools and the relative paucity of expertise have further conspired to inhibit the acceptance of JP2K in digital library workflows
This one-day workshop will bring together a range of specialist practitioners with experience of JP2K for digital libraries and digital archives. It will shed light on current and emerging practice and will enable a debate about future directions. Case studies of tools and workflows with JP2K will be presented and consideration will be given to how these developments can inform and extend preservation practice for image archives, digital photography and digitisation.
Who should come?
This briefing day will interest:
- Collections managers, librarians, curators, archivists in memory institutions
- CIOs and CTOs in commercial organisations with image collections and digitisation programmes
- Vendors and developers with image management or digital preservation solutions
- Researchers with interests e-infrastructure and digital preservation
- Photographers working with digital imaging workflows
- Staff and managers of digitization programmes
- Agencies that commission or fund digitization and photography for any purpose
Programme
09.30 – 10.00 Registration, breakfast, tea and coffee (tea and coffee available all morning)
10:00 – 10:10 Welcome and introduction, Robert Kiley, Head of Digital Services at the Wellcome Library
10:10 – 10:40 A Contemporary View of Image Formats for Libraries and Archives, Robert Buckley
10:40 – 11:00 Wellcome digital library infrastructure, Tom Crane, Technical Director, Digirati
11:00 – 11:20 Oxford digital library infrastructure, Matt MacGrattan, Oxford University Library
11:20 – 11:40 The Goobi workflow system, introduction and demos, Steffen Hankiewicz, intranda GmbH
11:40 – 12:10 IIPImage and a Performance Analysis of JPEG2000 Encoding Parameters, Ruven Pillay, C2RMF, Palais du Louvre, Paris
12:10 - 12:30 Panel Q&A
12:30 – 13:15 Lunch
13.15 – 13:30 JP2 at the Wellcome Library, and survey results, Christy Henshaw, Wellcome Library
13:30 – 13:50 Analysis of the variability in digitised images compared to the distortion introduced by compression, Sean Martin
13:50 – 14:10 Jpylyzer, a validator for JP2 images, Johan van der Knijff, National Library of the Netherlands
14:10 – 14:30 Status and perspectives of OpenJPEG, an open-source JPEG 2000 reference implementation, Antonin Descampe, Université catholique de Louvain (Belgium)
14:30 – 14:50 Format selection: the bigger picture, Maureen Pennock, British Library
14:50 – 15:10 Tea and coffee
15:10 – 15:40 Panel Q&A
15:40 – 16:00 A Glance at the Future - the Image as Dr Who’s TARDIS , Simon Tanner, King’s College London
16:00 Discussion, thanks and close
Remember to tweet and follow the event using the hashtag: #digi_trends