Direct measurement of the system latency of gaze-contingent displays.

ABSTRACT: Gaze-contingent displays combine a display device with an eyetracking system to rapidly update an image on the basis of the measured eye position. All such systems have a delay, the system latency, between a change in gaze location and the related change in the display. The system latency is the result of the delays contributed by the eyetracker, the display computer, and the display, and it is affected by the properties of each component, which may include variability. We present a direct, simple, and low-cost method to measure the system latency. The technique uses a device to briefly blind the eyetracker system (e.g., for video-based eyetrackers, a device with infrared light-emitting diodes (LED)), creating an eyetracker event that triggers a change to the display monitor. The time betw

SUBMITTER: Saunders DR 

PROVIDER: S-EPMC4077667 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature