Design, Assembly, Calibration, and Measurement of an Augmented Reality Haploscope

A haploscope is an optical system which produces a carefully controlled virtual image. Since the development of Wheatstone's original stereoscope in 1838, haploscopes have been used to measure perceptual properties of human stereoscopic vision. This paper presents an augmented reality (AR) haploscope, which allows the viewing of virtual objects superimposed against the real world. Our lab has used generations of this device to make a careful series of perceptual measurements of AR phenomena, which have been described in publications over the previous 8 years. This paper systematically describes the design, assembly, calibration, and measurement of our AR haploscope. These methods have been developed and improved in our lab over the past 10 years. Despite the fact that 180 years have elapsed since the original report of Wheatstone's stereoscope, we have not previously found a paper that describes these kinds of details.Comment: Accepted and presented at the IEEE VR 2018 Workshop on Perceptual and Cognitive Issues in AR (PERCAR); pre-print versio

Object-Order Rendering of Discrete Objects

This dissertation gives accurate and efficient methods for the object-order rendering of discrete objects. Discrete objects are typically represented with a volume raster and rendered with a volume rendering algorithm. However, current object-order volume rendering algorithms suffer from several problems. First, they require that the volume raster be traversed in a strict visibility order, but existing visibility ordering methods do not always correctly order perspective projections of volume rasters. Second, both perspective and orthographic renderings of volume rasters can contain aliasing artifacts, but current object-order techniques have no method for addressing these artifacts. Third, computergenerated animations suffer from temporal aliasing artifacts, which can be addressed by adding motion blur. But currently the only motion-blur method for object-order techniques is super-sampling, which is very expensive. Thi

Fast Collision Detection with an N-Objects Octree

This report describes a collision detection system which uses the N-objects octree algorithm. This technique is described by Shaffer & Herb in an unpublished report [1991], and subsequently published in IEEE Transactions on Robotics and Automation [Shaffer & Herb 1992]. The algorithm was developed and tested with the Hook [1992] animation system. The algorithm and its implementation are described, with particular attention to the design of the octree component as an abstract data type (ADT). In addition, timing test results are reported