Accession Number : ADA266174


Title :   Reference Frames in Vision


Descriptive Note : Annual rept. 15 Feb 1992-14 Feb 1993


Corporate Author : ROCHESTER UNIV NY CENTER FOR VISUAL SCIENCE


Personal Author(s) : Hayhoe, Mary M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266174.pdf


Report Date : 26 May 1993


Pagination or Media Count : 6


Abstract : This research examines the consequences of observer motion for visual functioning. Two major visual issues are addressed. The first issue is how a grossly time-varying retinal input (due to eye, head, and body motion) results in the perception of a continuous and directionally stable world. The second issue concerns the relatedness of the visual information that is retained from previous viewing. An examination of 'deictic primitives' (e.g., fixation points) and their importance for accurate internal representations is being investigated by covarying the temporal access to the sensory input during the problem solving process. Preliminary observations reveal some notable features of the-eye and head coordination: (1) Head movement frequently leads the gaze change and (2) The fraction of gaze shift due to head movement varied from 20% for short, vertical movements, to nearly 100% for large horizontal movements. It was in general dependent on the sub-task, and was larger for horizontal than vertical gaze changes. In addition, it was shown that the gaze moved first to the model area, then is refined down to the workspace, while the head simply moves to the model area.... Deictic primitives, Robotic models, Observer motion, Retinal input, Orientation, Saccade-contingent display update.


Descriptors :   *MOTION , *VISION , *VISUAL PERCEPTION , SIGNAL PROCESSING , INPUT , OBSERVERS , SPATIAL DISTRIBUTION , ROBOTICS , PROBLEM SOLVING , INTERNAL , MOTOR REACTIONS , EYE MOVEMENTS , HEAD(ANATOMY) , EYE , RETINA , TIME , ORIENTATION(DIRECTION) , MODELS , MEMORY(PSYCHOLOGY) , OBSERVATION , ROBOTS


Subject Categories : Psychology
      Anatomy and Physiology


Distribution Statement : APPROVED FOR PUBLIC RELEASE