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In the 16th century Hans Ritter, a student of Lucas Cranach the Elder, executed the mural paintings in the Broemserhof manor, Ruedesheim, which houses today a museum of mechanical instruments. The renaissance murals were painted in the secco-style and depict some biblical scenes next to a great variety of genealogical motifs.
The conservation of the murals has started in 2007 under the direction of Prof. Dr. Nicole Riedl from the University for Applied Sciences and Art in Hildesheim (HAWK). The team integrated students and alumni from the Cologne University for Applied Sciences and from HAWK. The mural has a tumultuous history, including heavy damage during the Second World War. However, there is a precise water colour copy of the intact mural paintings made by the 19th century artist Mogens Francesco Hendrik Ballin. This copy has inspired Michaela Janke, a student at the Cologne University for Applied Sciences’ conservation and restoration institute, to come up with an idea to restore the damaged murals. The idea consisted of projecting a digital picture based on the water colour painting onto the missing parts of the mural. The project came into reality with the support of the private software and hardware companies coolux GmbH and Burmester Event und Medientechnik. From left to right:
A damaged area of the murals in the Broemserhof manor.
The projection of a grid pattern onto the area for recognition.
Projection of the image on the mural surface.
Although this has already been tried, the novelty of this project resides in the manipulation of the image file. If a conventional slide projection would have been used it would have resulted into a distorted image due to the curvature of the arches where the image is projected. To overcome this problem, a special software normally used in opera performances and rock concerts was used. The method consists in the projection of a grid pattern onto the target area which is then recognised by a software that allows the picture to be easily adjusted. The area to be projected is about one and a half square meters. The image formed has a good quality and integrates well into the mural ensemble, remaining chromatically recognisable and non-intrusive at the same time. This new approach allowed Michaela Janke to prepare her forthcoming dissertation on the subject. A short movie about the project can be seen at http://www.youtube.com/watch?v=0WbzDSArOMA Credits Virtual Restoration Project Leader/Idea: Michaela Janke Contact: m.janke@gmx.de Financing: Hessian Department for the Protection of Historical Monuments, LfDH Supervisors: Professor Adrian Heritage and Professor Dr. Elisabeth Jaegers, University for Applied Sciences, Cologne. Christine Kenner, LfDH Prof. Dr. Nicole Riedl, HAWK Installation/Sponsoring: coolux GmbH and Burmester Event-und Medientechnik Conservation Project Leader: Prof. Dr. Nicole Riedl, HAWK Supervision of the restoration works: Christine Kenner, LfDH
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