Roughness vs. contrast in natural textures

Roughness vs. contrast in natural textures

Van Egmond, R.
De Ridder, H.
Pappas, T.N.
Silva, P.M.

Industrial Design Engineering

Industrial Design

2014-02-02

We investigate the effect of contrast enhancement on the subjective roughness of visual textures. Our analysis is based on subjective experiments with seventeen images from the CUReT database in three variants: original, synthesized textures, and contrast-enhanced synthesized textures. In Experiment 1, participants were asked to adjust the contrast of a synthesized image so that it became similar in roughness to the original image. A new adaptive procedure that extends the staircase paradigm was used for efficient placement of the stimuli. In Experiment 2, the subjective roughness and the subjective contrast of the original, synthesized, and contrastenhanced synthesized images were determined using a pairwise comparison paradigm. The results of the two experiments show that although contrast enhancement of a synthesized image results in a similar subjective roughness as the original, the subjective contrast of that image is considerably higher than that of the original image. Future research should give more insights in the interaction between roughness and contrast.

roughness metrics
subjective evaluation
texture analysis/synthesis

http://resolver.tudelft.nl/uuid:2b2ea7a0-4b66-4214-afce-e03a881054a6

https://doi.org/10.1117/12.2047135

SPIE

0277-786X

http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1850747

Proceedings of SPIE 9014: Human Vision and Electronic Imaging XIX, San Francisco (USA), 2 Febr. 2014

Institutional Repository

conference paper

(c) 2014 The Authors