Reproduction of shakuhachi from X-ray CT images by additive manufacturing

摘要

A Japanese traditional wind instrument, shakuhachi, is made of bamboo, and it has a different timbre for each instrument. There are some invaluable shakuhachi crafted over 500 years ago and it is desirable for those to be protected appropriately. The purpose of this study is to restore the shakuhachi from the shape information recorded in advance just in case the instrument is lost due to unforeseen circumstances. Reproducing shakuhachi by additive manufacturing (3D printing) has been attempted based on the X-ray images taken from two directions. Then, it has been confirmed that the shakuhachi were sufficiently restored with the feeling of playing the original shakuhachi. However, since the irregularities on the surface of bamboo cannot be reproduced with images taken from only two directions, the appearance of the shakuhachi was quite different from the original one. In this paper, a 3D model was created by introducing the adjustment processing to the contour of the original shakuhachi from the X-ray CT image, and then the reproduction was attempted so that the shakuhachi has a shape close to the original one using 3D printer.