Chain Line Pattern (CLiP) Matching Project Timeline (2012-present)

2012 / CLiP Matching Project launched by Rick Johnson (Cornell) in collaboration with the Morgan Library & Museum.

2013 / First conference presentation of semi-automated approach to matching chain line spacing and angle sequences at ``New Directions in the Study of Rembrandt and His Circle'' at Herstmonceux Castle.

2013 / The Morgan Library and Museum, the Rijksmuseum, and the Metropolitan Museum of Art agree to provide a database in support of algorithm development composed of dozens of beta-radiographs of prints by Rembrandt selected to include images of papers made with the same mold.

2014 / A dataset assembled by the CLiP Project of 129 scanned beta-radiographs of prints in the collections of the Morgan Library & Museum and the Metropolitan Museum of Art is made available through the Netherlands Insitute for Art History (RKD), thereby enabling other signal processing researchers to develop their own automated moldmate identifiers.

2014 / The Dutch University Insitute for Art History in Florence joined the CLiP project by providing access to their collection of high resolution images of over 1000 low-energy x-radiographs of Rembrandt's prints from the collections of several museums revealing the full-print chain line pattern.

2015 / Paper on applying original matching strategy to RKD dataset published in a special issue on signal processing for art investigation in the July issue of the IEEE Signal Processing Magazine.

2016 / Improved strategy combining semi-automated chain line marking plus optimal straight line extraction and pattern matching applied to Dutch University Institue for Art History dataset in paper presented at 50th Asilomar Conference on Signals, Systems, and Computers.