Networks & The Liberal Arts

Bits are Beautiful: The Girl with a Pearl Earring

Posted in Art, Digital Humanities by telombardi on June 27, 2013


Vermeer’s masterpiece is currently in the United States.  In honor of the “Dutch Mona Lisa”, I’ve prepared this image comprising seven transformations of the Girl with the Pearl Earring.

The blue background including the star burst is the fast Fourier transformation of the Girl with a Pearl Earring.  Then from left to right the transformations are: Sobel edges, Canny edges, gradient edges, block variation of local correlation coefficients, block difference of inverse probabilities, and a spatial chromatic histogram.  Finally, of course, we have the original image.

I created these transformations for a dissertation in digital image processing completed in 2005.  The project aimed to extract features from paintings for the purpose of describing artistic style.  Although I don’t work in this area much anymore, I always loved the project and these images in particular.

If you think that this is interesting, please consider attending THATCamp Pittsburgh on October 5th-6th, 2013.  For more details, please visit the following website:

Also,  please take this opportunity to see Vermeer’s spectacular work.  You can read more about where to see The Girl with a Pearl Earring on these sites:

The Mauritshuis Gallery, Collection on Tour:

Carol Vogel, “A Venerable Fresh Face Goes on Tour,” New York Times, January 26th, 2012:


The Communion of the Saints: Networks and Iconography

Posted in Art, Digital Humanities, Networks by telombardi on April 25, 2013


Co-occurrence Network of Saints in Early Images of Saint Francis

The Communion of the Saints presents a view of the Christian community that spans space, time, life, and death. Medieval iconography captures the evolution of the Communion by integrating new Saints into established iconographic imagery. The co-occurrences of Saints in medieval paintings provide a basis for modeling the development of iconography as a network. This study adapts techniques for analyzing groups of people in digital images to the images of Saints in medieval paintings. In the development of the iconography of St. Francis in the thirteenth and fourteenth centuries artists and their patrons exerted great effort to connect St. Francis to the rich iconographic tradition of the Middle Ages. The network of early images of St. Francis exhibits characteristics consistent with networks that develop by preferential attachment whereby the network evolves by attaching new nodes (recently canonized Saints) to those nodes with high degree. Accordingly, Christ, Mary, and Francis are hubs with high degree, and the degree distribution of the nodes fits that of a power-law distribution. The evolution of this structure, driven by the imagery of intercession, creates a dense network of closed triads arranged hierarchically from Christ to Mary to Francis to the broader community of Saints. By examining the evolution of the network, researchers can analyze and visualize the changing structure of the Communion of the Saints and its associated iconographic traditions.

This paper will be presented at the Arts, Humanities & Complex Networks 2013 Conference in June.

Conference Website: