| To propose evaluation methods for textures of revetment blocks, we examined relationships between sensory impression and physical structure for those. We used eight types of model blocks, which are often used currently and have different textures, and conducted questionnaire survey to acquire impression scores based on degree of roughness, unevenness, and coarseness for the texture of each block. Furthermore, we quantified the physical structure of the texture using surface profiles, the maximum difference in height, and power spectrum density (PSD). The impression scores were roughly related to the physical structures of the surface. Roughness and unevenness tended to correspond to surface profiles and the maximum difference in height, respectively, and coarseness do to both PSD and combination with surface profiles and the maximum difference in height. These results suggest that physical measurements could be used as an index for scenery evaluation since human impression for the texture of revetment blocks was explained by surface profiles and the maximum difference in height, and PSD. Thus, we could evaluate relative merits of textures of revetment blocks by comparison with criterial models (i.e., benchmark) for surface profiles and the maximum difference in height. |
