Technological Study of the Decoration on an Erard Harp from 1818

Improvement of the digital radiographic images of old paintings on wooden support through the anisotropic diffusion method

“…Paintings are usually radiographed using the X-rays with a tube voltage of between 20 and 100 kVolt in CR. However, since the interaction of X-ray with matter is related to the atomic number and thickness variations of the paints, with their thin low atomic number wooden support, the acquired radiographs do not offer sufficient contrast for visualization of specific features [18][19].…”