Label segregation by remapping stereoscopic depth in far-field augmented reality

Abstract

This paper describes a novel technique for segregating overlapping labels in stereoscopic see-through displays. The present study investigates the labeling of far-field objects, with distances ranging 100-120 m. At these distances the stereoscopic disparity difference between objects is below 1 arcmin, so labels rendered at the same distance as their corresponding objects appear as if on a flat layer in the display. This flattening is due to limitations of both display and human visual resolution. By remapping labels to predetermined depth layers on the optical path between the observer and the labeled object, an interlayer disparity ranging from 5 to 20 arcmin can be achieved for 5 overlapping labels. The present study evaluates the impact of such depth separation of superimposed layers, and found that a 5 arcmin interlayer disparity yields a significantly lower response time, over 20% on average, in a visual search task compared to correctly registering labels and objects in depth. Notably the performance does not improve when doubling the interlayer disparity to 10 arcmin and, surprisingly, the performance degrades significantly when again doubling the interlayer disparity to 20 arcmin, approximating the performance in situations with no interlayer disparity. These results confirm that our technique can be used to segregate overlapping labels in the far visual field, without the cost associated with traditional label placement algorithms.

Basic Perception in Head-Worn Augmented Reality Displays

“…Dynamic scenes (including moving labels) yielded lower error rates than static scenes. An earlier experiment [30] found that correct vertical separation based on depth yielded lower error than no vertical separation and inverted vertical separation. Correct vertical separation meant that the closest target, which was lowest in the visual field, had the lowest label in the visual field.…”

Aligning Realities: Correlating Content between Projected and Head Worn Displays

“…They found that users were able to read labels fastest for algorithms that focused on preventing overlap, the key attribute for response time. Peterson et al [15] looked at label segregation in stereo vision at far distances (100-120 m) using an optical see-through display. They presented a method for segregation that reduces the cost imposed by traditional label placement methods.…”

A Type-2 Fuzzy Logic Based System for Augmented Reality Visualisation of Georeferenced Data

“…Since previous HMDs outdoor evaluation studies have shown that text and colours could appear altered or washed out on the displays in daylight; an additional setting to adjust the AR app for outdoor use was considered. Previous studies [32], [33] recommend augmented elements to be 10-15% brighter than the background; this is in order to make them visible on a stereoscopic display. Hence, the daylight intensity level is used to adjust the brightness of virtual elements and 3D objects.…”