Visual vs. Temporal Fidelity

What is the proper balance between visual and temporal detail? This project is an initial exploration into this very basic question. We use a simple rotation task as a testbed, presenting users with either high or low fidelity at one of several frame rates. We control swapping between high and low fidelity with three schemes: always high, low only during motion, or I/O differencing. I/O differencing swaps to low fidelity only when the rotational difference between input and displayed positions is above a certain fixed threshold. We find that I/O differencing strikes a good balance between the high and low fidelity schemes.

Project members: Ben Watson (NU), Oscar Meruvia (U Magdeburg).

Publications

O. Meruvia (1999). Level of detail selection and interactivity (pdf.zip). Masters thesis, U. Alberta, Sept 1999.

Imagery

	An experimental view Participants tried to match the orientation of the standard on the right by rotating the view on the left using an Arcball interface.
	Experimental results Rotation times (secs) as a function of delay times (ms) and fidelity control method. I/O differencing clearly optimized performance for this task, mimicking always high when delays were low, and low on motion when delays were high.