New Digital Sensing Techniques To Evaluate Ornamental Stone Surface Finishing And Related Produced Airborne Dusts.

Ornamental stone hand made polishing in dry conditions can be assumed as one of the widely used techniques to realise special stone manufactured goods. Such an action produces a lot of dust and noise. Furthermore polishing effects on the stone surface are very difficult to objec-tively quantify, in an easy to use and reliable way. In this paper are reported the results, achieved in the ENVICUT project, with reference to two new digital based approaches: the first one, based on spectrophotometric sensing techniques able to objectively quantify the de-gree of polishing of stone surfaces and the second one, based on a 2D fractal imaging based approach able to characterise, for the different stone, dust population resulting from such a kind of dry working action.