Natural Scene Text Understanding
Céline Mancas, Bernard Gosseli · 2007
Flight simulation often depends on both visual simulation and movement by a motion base.The present study asks if tilt is equivalently perceived as linear translation, and if so, whether other information such as simulated day or night conditions may affect accuracy.We examine the perception of self-motion in non-pilots during passive simulated airplane taxiing along a straight runway.Providing physical motion cueing by a motion platform, simulation scenarios were presented at a constant physical or visual acceleration of either 0.4 m/s 2 or 1.6 m/s 2 (simulated using tilt).Nine subjects indicated the moment when they perceived that they had travelled through distances between 10 to 90 m under either day or night-time display conditions.Their estimates were made either with or without tilt (to simulate linear acceleration).We present results as a ratio of response distance (response distance) to stimulus distance (stimulus distance).Subjects' motion estimates under tilt conditions do not significantly differ from under vision-only conditions.We found an interaction of tilt and illumination conditions, particularly for targets greater than 30 m.The ratio of response distance to stimulus distance significantly increases in the dark (1.1 vs. 0.85), at higher accelerations (1.01 for 1.6 m/s 2 vs. 0.95 for 0.4 m/s 2 ) and, during daytime illumination, in the presence of a physical-motion cue (0.92 vs. 0.78).Conditions affecting the magnitude of perceived self-motion include: • illumination • magnitude of the simulated acceleration • presence of physical tilt during daytime illuminationThis study shows that passive humans can be expected to make significant, predictable errors in judging taxiing distances under specific simulation conditions.Questions for further research include: • if similar effects occur in pilots as in non-pilots • if such effects also occur in real taxiing scenarios The results obtained here may help to counter perceptual errors, as the results become part of the knowledge on which appropriate cueing schemes can be based.6 www.intechopen.comHow to reference In order to correctly reference this scholarly work, feel free to copy and paste the following: Daniel C. Zikovitz, Keith K. Niall, Laurence R. Harris and Michael Jenkin (2010).Simulated Day and Night Effects on Perceived Motion in an Aircraft Taxiing Simulator, Modeling Simulation and Optimization -Tolerance and Optimal Control, Shkelzen Cakaj (Ed.),