Effects of Optical Combiner and IPD Change for Convergence on Near-Field Depth Perception in an Optical See-Through HMD

Lee, Sang Yoon; Hu, Xiaolin; Hua, Hong

doi:10.1109/tvcg.2015.2440272

Cited by 12 publications

(7 citation statements)

References 31 publications

(49 reference statements)

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“…Augmented reality (AR) has become quite popular as it works as a bridge between the real world and the virtual world. An optical see‐through AR system can successfully combine the ambient environment and the display light . To achieve this goal, a polarizing beam splitter (PBS) is usually utilized by reflecting the display light and transmitting a portion of the ambient light .…”

Section: Introductionmentioning

confidence: 99%

“…An optical see-through AR system can successfully combine the ambient environment and the display light. [1][2][3][4] To achieve this goal, a polarizing beam splitter (PBS) is usually utilized by reflecting the display light and transmitting a portion of the ambient light. 5 However, the PBS encounters two shortcomings: (i) it makes the whole system bulky and heavy 6,7 and (ii) it is still challenging to obtain high contrast ratio when the ambient light is strong.…”

Section: Introductionmentioning

confidence: 99%

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High-ambient-contrast augmented reality with a tunable transmittance liquid crystal film and a functional reflective polarizer

Zhu

Chen

Kósa

et al. 2016

Jnl Soc Info Display

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We have proposed a compact, yet high ambient contrast ratio augmented reality (AR) system by incorporating a tunable transmittance liquid crystal (LC) cell and a thin functional reflective polarizer. The broadband polarization‐independent guest–host LC cell can change the transmittance from ~73% to ~26% with merely 8 V. Its response time (~50 ms) is at least 10× faster than that of photochromic materials used in commercial transition glasses. Combining the LC cell with a light sensor, the tunable transmittance LC cell can efficiently improve the ambient contrast ratio of the AR system under different lighting conditions. Meanwhile, the functional reflective polarizer works similarly to a polarizing beam splitter, except that it is much more compact and lighter weight. With some modification, we also designed a functional reflective polarizer to help people with color vision deficiency.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-ambient-contrast augmented reality with a tunable transmittance liquid crystal film and a functional reflective polarizer

Zhu

Chen

Kósa

et al. 2016

Jnl Soc Info Display

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“…In order to render 3D objects accurately on 3D-AR device screens, the user’s IPD must be taken into account. For a detailed treatment of how IPD measurement and errors affect 3D-AR visualization accuracy, we refer interested readers to existing work which has demonstrated that IPD errors can cause errors in depth estimation [59] , [60] . The first-generation HoloLens IPD calibration consists of each display showing a number of targets and the user aligning a finger with the targets.…”

Section: Other Factors Affecting Accuracymentioning

confidence: 99%

Registration Techniques for Clinical Applications of Three-Dimensional Augmented Reality Devices

Andrews

Henry²,

Soriano³

et al. 2021

IEEE J. Transl. Eng. Health Med.

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Many clinical procedures would benefit from direct and intuitive real-time visualization of anatomy, surgical plans, or other information crucial to the procedure. Three-dimensional augmented reality (3D-AR) is an emerging technology that has the potential to assist physicians with spatial reasoning during clinical interventions. The most intriguing applications of 3D-AR involve visualizations of anatomy or surgical plans that appear directly on the patient. However, commercially available 3D-AR devices have spatial localization errors that are too large for many clinical procedures. For this reason, a variety of approaches for improving 3D-AR registration accuracy have been explored. The focus of this review is on the methods, accuracy, and clinical applications of registering 3D-AR devices with the clinical environment. The works cited represent a variety of approaches for registering holograms to patients, including manual registration, computer vision-based registration, and registrations that incorporate external tracking systems. Evaluations of user accuracy when performing clinically relevant tasks suggest that accuracies of approximately 2 mm are feasible. 3D-AR device limitations due to the vergenceaccommodation conflict or other factors attributable to the headset hardware add on the order of 1.5 mm of error compared to conventional guidance. Continued improvements to 3D-AR hardware will decrease these sources of error.

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“…Physiological depth cues are cues that cause differences in perception via the physiological gap of the depth perception system 13 . It generally includes static and dynamic cues related to human eyes (e.g., accommodation, convergence, 14 binocular parallax, 15 motion parallax, 16 and motion perspective).…”

Section: Related Workmentioning

confidence: 99%

Design and analysis of depth cues on depth perception in interactive mixed reality simulation systems

Wang

et al. 2021

J Soc Info Display

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Implementing an interactive mixed reality simulation system is an economical and risk‐free method for skill training. However, research to enhance the accuracy of mixed reality simulation has always been a challenge. One of the key indicators of a simulation's accuracy is the user's depth perception. Adding depth cues to the simulation scene can effectively increase the accuracy of depth perception. Therefore, in this study, we designed five depth cues to find the one most beneficial for depth perception: (1) depth bar, (2) location ball, (3) fixed window, (4) 3D wireframe, and (5) movable silhouettes. These depth cues were tested using an experimental system with two sets of experimental settings. The first experiment compared the five depth cues at five different viewing distances and showed that the movable silhouettes benefited depth perception accuracy the most. The second experiment compared depth perception accuracies among three different horizontal tilt settings, showing that depth perception accuracy is dependent on the horizontal tilt. Furthermore, different depth perception accuracies were obtained with and without depth cues, proving that the effects from the horizontal tilts were independent of depth cues. The results of these studies provide references for designing interactive mixed reality simulation systems.

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Effects of Optical Combiner and IPD Change for Convergence on Near-Field Depth Perception in an Optical See-Through HMD

Cited by 12 publications

References 31 publications

High-ambient-contrast augmented reality with a tunable transmittance liquid crystal film and a functional reflective polarizer

High-ambient-contrast augmented reality with a tunable transmittance liquid crystal film and a functional reflective polarizer

Registration Techniques for Clinical Applications of Three-Dimensional Augmented Reality Devices

Design and analysis of depth cues on depth perception in interactive mixed reality simulation systems

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