DIGITAL RESTORATION OF DAMAGED MURAL IMAGES

Abstract

As the time passes, the paintings or murals that are made up of materials, can suffer damage. To protect them for a long period of time, they are coated with a varnish layer to protect them. The atmospheric conditions, temperature variations, humidity and sunlight can affect the varnish layer of painting or murals. After a long period of time, the painting color is degrades and seems to be brown or black filter or amber because the transparency of varnish layer becomes clouded and discolored. Few old paintings or murals suffer from breaks in the substrate material, the paint, or the varnish layer. These patterns can be caused by drying, aging and mechanical factors and known cracks or craquelure. Due to Age cracks the supporting canvas or wood-panel of the painting can suffer from nonuniform contraction that can stresses the layers of the painting or murals. Due to the consequent shrinkage of the paint and evaporation of volatile paint components, Drying cracks are made up. Vibrations and impacts on painting can cause painting deformation, hence mechanical cracks result in painting or murals. The overall visual appearance of old paintings or murals can degrade by the phenomenon of Varnish oxidation. The degradation such as Smoke and Dirt deteriorate the situation even more. These above degradation results as the color faint and the mural appears black. It happens mostly in Church, where candle smoke degrades painting colors. Due to this degradation, the artistic value of a painting also degrades. To remove this oxidation layer, there are many conservation experts; they performed this removing process of oxidation very well. But this process is time-consuming as well as not reliable. This cleaning process became quite difficult due to different prevailing environmental conditions and the chemical properties of different types of varnishes to select the appropriate cleaning process quite. A trial and error approach is implemented on the murals to cleaning the oxidation. In this process, the chemical cleaning substances are applied in small regions of the painting. Then after the most one will be subsequently utilized to clean the whole painting.