Delivering Visual Resources

Delivering Visual Resources

An introduction

Internet, intranet, CD/DVD, hybrid Image preparation Metadata for search and retrieval System development Design Protecting images

Delivering Visual Resources: introduction

Internet, intranet, CD/DVD, hybrid Web delivery generally regarded as desirable

but this can be problematic for either technical reasons or because of rights

For an in-house solution (perhaps delivering for particular courses) an intranet solution might be preferred

For large images, CD or DVD might be chosen A hybrid solution can be a good strategy with CD/DVD and

web site

Delivering Visual Resources: introduction

Internet, intranet, CD/DVD, hybrid An example

The Lindisfarne Gospel at the British Library Available online

can be very slow because of ‘Turning the Pages’ technology

small images, not useful for research purposes Available on CD

much faster high quality images

Delivering Visual Resources: introduction

Image preparationcreating derivatives

size, format, compressionthese will depend on the delivery system chosenmuch larger images on CD

using proprietary solutionsZoomify, DjVu, etc

these can also be a way of protecting imagesExample: DIAMM (Digital Image Archive of Medieval Music)

Delivering Visual Resources: introduction

Metadata for search and retrievalmetadata will be discussed in detail tomorrow

Need to decide what users are likely to search onAnd what information they will need when they have accessed the resourceHow will they know that they have what they need?How much metadata? What kinds?

Delivering Visual Resources: introduction

System development: optionsUse a proprietary systemCustomize a systemCommission a system from suppliersBuild a system yourself

All have advantages and disadvantagesWhat skills and resources do you have available?How will you best maintain the system?

Delivering Visual Resources: introduction

Typical data flow and system overview

Design

Three key aspects of designunderlying data designunderlying architecture of the systemvisual design

All are criticalbut the data design is probably the most important

They should all work together

Delivering Visual Resources: Design

Protecting imagesWhy protect images

rights managementprotection against misuse

How?WatermarkingResolution – keep image less than 200 pixelsLock them into a system that doesn’t allow easy interference like Zoomify

Delivering Visual Resources: Protecting images

Digimarc and security

“Our Digimarc service and digital watermarking in general are not designed as a security tool or to stop the theft of images.  We don't make any such claims or portray our service in that light.  There is no 100% effective method of watermarking.  With the right know-how and tools any technology can be beaten eventually. Digital watermarking, like any technology. has its strengths and weaknesses. 

The ability for Digimarc to locate specific image content, filtering out specified content providing rights attribution for photographers and content owners, and searing a unique ID into the image that can be tied back to source meta data leaves Digimarc offering a service of great value to the right application base.”

Todd Burns, Sr. Acct Executive, Digimarc CorporationFrom email received 26th April 2004