@inproceedings{Ihrke-et-al_SPIE09,
TITLE = {A Perceptual Evaluation of {3D} Unsharp Masking},
AUTHOR = {Ihrke, Matthias and Ritschel, Tobias and Smith, Kaleigh and Grosch, Thorsten and Myszkowski, Karol and Seidel, Hans-Peter},
LANGUAGE = {eng},
DOI = {doi:10.1117/12.809026},
LOCALID = {Local-ID: C125675300671F7B-5AB79508CF9875C4C125755C0035BB4C-Ihrke2009SPIE},
PUBLISHER = {SPIE},
YEAR = {2009},
DATE = {2009},
ABSTRACT = {Much research has gone into developing methods for enhancing the contrast of <br>displayed 3D scenes. In the<br>current study, we investigated the perceptual impact of an algorithm recently <br>proposed by Ritschel et al.1 that<br>provides a general technique for enhancing the perceived contrast in <br>synthesized scenes. Their algorithm extends<br>traditional image-based Unsharp Masking to a 3D scene, achieving a <br>scene-coherent enhancement. We conducted<br>a standardized perceptual experiment to test the proposition that a 3D unsharp <br>enhanced scene was superior to<br>the original scene in terms of perceived contrast and preference. Furthermore, <br>the impact of different settings<br>of the algorithm{\textquoteright}s main parameters enhancement-strength (¸) and gradient size <br>(¾) were studied in order to<br>provide an estimate of a reasonable parameter space for the method. All <br>participants preferred a clearly visible<br>enhancement over the original, non-enhanced scenes and the setting for <br>objectionable enhancement was far<br>above the preferred settings. The effect of the gradient size ¾ was negligible. <br>The general pattern found for<br>the parameters provides a useful guideline for designers when making use of 3D <br>Unsharp Masking: as a rule of<br>thumb they can easily determine the strength for which they start to perceive <br>an enhancement and use twice<br>this value for a good effect. Since the value for objectionable results was <br>twice as large again, artifacts should<br>not impose restrictions on the applicability of this rule.},
BOOKTITLE = {Human Vision and Electronic Imaging XIV, IS \&T SPIE's 21st Annual Symposium on Electronic Imaging},
EDITOR = {Rogowitz, Bernice E. and Pappas, Thrasyvoulos N.},
PAGES = {72400R--1-12},
SERIES = {Annual Symposium on Electronic Imaging},
VOLUME = {7240},
ADDRESS = {San Jose, CA, USA},
}