Level of detail (LOD) is widely used to control visual feedback in interactive applications. LOD control is typically based on perception at threshold - the conditions in which a stimulus first becomes perceivable. Yet most LOD manipulations are quite perceivable and occur well above threshold. Moreover, research shows that supra-threshold perception differs drastically from perception at threshold. In that case, should supra-threshold LOD control also differ from LOD control at threshold? In two experiments, we examine supra-threshold LOD control in the visual periphery and find that indeed, it should differ drastically from LOD control at threshold. Specifically, we find that LOD must support a task-dependent level of reliable perceptibility. Above that level, perceptibility of LOD control manipulations should be minimized, and detail contrast is a better predictor of perceptibility than detail size. Below that level, perceptibility must be maximized, and LOD should be improved as eccentricity rises or contrast drops. This directly contradicts prevailing threshold-based LOD control schemes, and strongly suggests a reexamination of LOD control for foveal display.
|Original language||English (US)|
|Number of pages||10|
|Journal||ACM Transactions on Graphics|
|State||Published - 2004|
|Event||ACM Transactions on Graphics - Proceedings of ACM SIGGRAPH 2004 - |
Duration: Aug 9 2004 → Aug 12 2004
- Human factors.
- Level of detail
- Peripheral visual sensitivityh
- Supra-threshold visual sensitivity
ASJC Scopus subject areas
- Computer Graphics and Computer-Aided Design