砂防施設壁面パターンの視覚的効果

抄録

In order to match Sabo facilities to surroundings and to make them suave to the human sense of vision, surface patterns seem to be as important as the brightness of the surface. In this point of view, here the focus is put on the surface pattern on Sabo structures, and the investigation by means of spatial frequency fluctuation, Fractal dimension, questionnaire, and multi-discriminant analysis are carried out. Natural torrent bed surface is felt as “bland surface pattern” in the sense of vision, therefore they are supposed to have “bland fluctuation i.e. 1/f fluctuation (f : frequency)”. Consequently, it is found that the surface pattern with 1/f fluctuation have suave vision and the handmade structure like stone-made dam has 1/f fluctuation that means “the human touch bland pattern.” But simple pattern with a keen peak in its spectrum seems to give a good impression, too.