In addition to the sequence of 2D cuts, our documentation comprises 3D renderings of selected parts of the body.
For instance, a view of the top from the inside in 3D. Several cleats, partial doubling of the edges, a huge soundpost patch and additional repair work in the soundpost area are clearly visible and can be located with precision.
View of the back of the same instrument from the inside in 3D. The cracks and the big doubling are clearly visible. The bright stripes seem to be reinforcements of parchment, saturated with glue.
By changing the alpha-value of the 3D rendering (which controls the transparency) the glue joints become even more prominent.
ROIs (regions of interest) deserve our special attention. These segments are shown in separate 3D renderings.To run an animated version of this 3D visualization click here.
. In this sequence, the alpha-value of the rendering has been decreased step by step from 1 to 0.1. This manipulation lets the softer parts of the item (wood) become darker while the denser and therefore brighter regions (glue) are emphasized.
To increase the information obtainable from this rendering we can tweak the alpha-value so that the glue joints, their thickness and their position can be assessed.