Matching Image Update Rates in Gaze-Contingent Multi-Resolutional Displays to the Temporal Limits of Vision
Another key question for designers of gaze-contingent multi-resolutional displays is regarding how fast you need to update the center of highest resolution each time the viewer moves their eyes. If this updating is too slow, it may cause perceptual difficulties. We have conducted several studies this issue, to identify deadlines for image updating that do not interfere with perception. An initial study (McConkie & Loschky, 2002) determined the earliest point in an eye fixation when image blur becomes detectable, which is 6 milliseconds after the eye has stopped moving. However, a 6 ms update delay deadline is overly conservative for use in gaze-contingent multi-resolutional displays. Two follow-up studies (Loschky, in preparation; Loschky & McConkie, in press) have found that longer delays can be used with causing perception and performance difficulties. Loschky and McConkie (in press) have shown that delays of up to 60 ms do not increase the detectability of just-noticeable blur. Another study with more detectable blur (Loschky, in preparation) found that a 45 ms delay slightly increased eye fixation durations, but did not increase search times for targets in natural scenes. These studies provide critical information for designers of gaze-contingent multi-resolutional display applications.
Loschky, L.C. & Wolverton, G.S. (2007). How Late Can You Update Gaze-contingent Multi-resolutional Displays Without Detection? ACM Transactions on Multimedia Computing, Communications and Applications, 3(4):25, 1-10.
Loschky, L.C., & McConkie, G.W. (2005). How late can you update? Detecting blur and transients in gaze-contingent multi-resolutional displays. Proceedings of the Human Factors and Ergonomics Society 49th Annual Meeting-2005.. (pp. 1527-1530). Santa Monica, CA: HFES.
Loschky, L.C., & McConkie, G.W. (2000). User performance with gaze contingent multiresolutional displays. In A. T. Duchowski (Ed.), Proceedings of the Eye Tracking Research & Applications Symposium 2000 (pp. 97-103). New York, NY: ACM.