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Perceived roughness of 1/fβ noise surfaces

2008; Elsevier BV; Volume: 48; Issue: 17 Linguagem: Inglês

10.1016/j.visres.2008.05.015

1878-5646

Stefano Padilla, Ondřej Drbohlav, Patrick R. Green, A D Spence, Mike J. Chantler,

Optical measurement and interference techniques

We report results from a new methodology for investigating the visually perceived properties of surface textures. Densely sampled two-dimensional 1/fβ noise processes are used to model natural looking surfaces, which are rendered using combined point-source and ambient lighting. Surfaces are shown in motion to provide rich cues to their relief. They are generated in real time to enable observers to dynamically manipulate surface parameters. A method of adjustment is employed to investigate the effects that the two surface parameters, magnitude roll-off factor and RMS height, have on perceived roughness. The results are used to develop an estimation method for perceived roughness.