On Friday April 24 we launched the NGA's Online Systematic Catalogue Initiative which features a customized IIP client for comparing images.
_Press release http://www.nga.gov/content/ngaweb/press/2014/nga-online-editions.html _The overall project home page_ http://www.nga.gov/content/ngaweb/research/online-editions.html _The first cataloguing effort (Dutch 17^th Century Paintings)_ http://www.nga.gov/content/ngaweb/research/online-editions/17th-century-dutch-paintings.html _An example of the IIP client in action_ [select menu? entry? then figures in the right column and select an image. The overlay + cross-fade feature is available for technical images] http://www.nga.gov/content/ngaweb/Collection/art-object-page.60.html Alan Newman National Gallery of Art
