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ACM Transactions on Applied Perception (TAP), Volume 6 Issue 4, September 2009

Guest editorial
Bobby Bodenheimer, Carol O'Sullivan
Article No.: 21
DOI: 10.1145/1609967.1609968

Talking bodies: Sensitivity to desynchronization of conversations
Rachel McDonnell, Cathy Ennis, Simon Dobbyn, Carol O'Sullivan
Article No.: 22
DOI: 10.1145/1609967.1609969

In this article, we investigate human sensitivity to the coordination and timing of conversational body language for virtual characters. First, we captured the full body motions (excluding faces and hands) of three actors conversing about a range...

Screen-space perceptual rendering of human skin
Jorge Jimenez, Veronica Sundstedt, Diego Gutierrez
Article No.: 23
DOI: 10.1145/1609967.1609970

We propose a novel skin shader which translates the simulation of subsurface scattering from texture space to a screen-space diffusion approximation. It naturally scales well while maintaining a perceptually plausible result. This technique allows...

Perceptual influence of approximate visibility in indirect illumination
Insu Yu, Andrew Cox, Min H. Kim, Tobias Ritschel, Thorsten Grosch, Carsten Dachsbacher, Jan Kautz
Article No.: 24
DOI: 10.1145/1609967.1609971

In this article we evaluate the use of approximate visibility for efficient global illumination. Traditionally, accurate visibility is used in light transport. However, the indirect illumination we perceive on a daily basis is rarely of...

Handling occluders in transitions from panoramic images: A perceptual study
Yann Morvan, Carol O'Sullivan
Article No.: 25
DOI: 10.1145/1609967.1609972

Panoramic images are very effective at conveying a visual sense of presence at very low cost and great ease of authoring. They are, however, limited in the navigation options they offer, unlike 3D representations. It is therefore desirable to...

Perception of differences in natural-image stimuli: Why is peripheral viewing poorer than foveal?
M.P.S. To, I.D. Gilchrist, T. Troscianko, J.S.B. Kho, D.J. Tolhurst
Article No.: 26
DOI: 10.1145/1609967.1609973

Visual Difference Predictor (VDP) models have played a key role in digital image applications such as the development of image quality metrics. However, little attention has been paid to their applicability to peripheral vision. Central (i.e.,...