The Effect of Gloss on Perceived Roughness L Qi1, C Yang1, J Wu1, J Dong1, M Chantler2, S Padilla2, Z Liang1 |
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1Department of Computer Science and Technology, Ocean University of China, China |
| Previous study has shown that magnitude roll-off factor (ß) and RMS height (σ) that related to 1/f^ß random phase noise surface topology significantly affect perceived roughness under the assumption of Lambertian reflectance [Padilla, Stefano, et al. 2008, Vision Research, 48.17 : 1791-1797]. We further employed a glossy reflection model to investigate if surface gloss affects perceived roughness of such surfaces. We conducted a paired comparison experiment and scaled perceived roughness (relative difference) using Maximum Likelihood Estimation. We found consistent results with literature in that perceived roughness increases with the decreasing of ß and the increasing of σ (F=93.964 and 144.981, both with p<0.01). Interestingly, surface gloss significantly affects roughness perception (F=127.847, p<0.01). In the surface pair of the same ß and σ, the glossier one was perceived less rough. This difference gets smaller as the surfaces become rougher (decreasing ß or increasing σ). It can be seen from the insignificance within the pair of smallest ß and largest σ (t=1.215, p=0.248), which is roughest according to literature. We concluded that surface gloss affects perceived roughness, but the degree of influence depends on the surface topology. [NSFC Project No. 61271405] |
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