Optical see-through head-mounted display with occlusion capability

Gao, Chunyu; Lin, Yuxiang; Hua, Hong

doi:10.1117/12.2015937

Cited by 24 publications

(7 citation statements)

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“…This enables the HoloLens to accurately determine its pose and robustly place virtual objects, which Microsoft calls "holograms", within the real environment. In order to enable occlusions with this technology, the HMD hardware has to be prepared for it (Gao et al, 2013). In a collaborative AR project, every participating person has to wear such a device.…”

Section: Related Workmentioning

confidence: 99%

Projector-Based Augmented Reality for Quality Inspection Of Scanned Objects

Kern

Weinmann

Wursthorn

2017

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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After scanning or reconstructing the geometry of objects, we need to inspect the result of our work. Are there any parts missing? Is every detail covered in the desired quality? We typically do this by looking at the resulting point clouds or meshes of our objects on-screen. What, if we could see the information directly visualized on the object itself? Augmented reality is the generic term for bringing virtual information into our real environment. In our paper, we show how we can project any 3D information like thematic visualizations or specific monitoring information with reference to our object onto the object’s surface itself, thus augmenting it with additional information. For small objects that could for instance be scanned in a laboratory, we propose a low-cost method involving a projector-camera system to solve this task. The user only needs a calibration board with coded fiducial markers to calibrate the system and to estimate the projector’s pose later on for projecting textures with information onto the object’s surface. Changes within the projected 3D information or of the projector’s pose will be applied in real-time. Our results clearly reveal that such a simple setup will deliver a good quality of the augmented information.

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Section: Related Workmentioning

confidence: 99%

Projector-Based Augmented Reality for Quality Inspection Of Scanned Objects

Kern

Weinmann

Wursthorn

2017

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…With the rapid development of communication technology, virtual display technology has been widely used in national defense, entertainment, business, medical treatment, processing and other fields [1]- [10]. The head mounted augmented reality display projects the virtual reality picture to the front of the observer, and at the same time realizes the clear superposition with the scene picture, which can improve the information acquisition sensitivity and alleviate the fatigue of constantly turning down the head to shift the visual focus [11].…”

Section: Introductionmentioning

confidence: 99%

Surface Micro-Reflector Array for Augmented Reality Display

Yan

Zhang³

2020

IEEE Photonics J.

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Geometric optical waveguide display can significantly miniaturize the augmented reality eyeglasses, but suffers from the ghost image. In this paper, a method using surface micro-reflector array is proposed, which can dramatically suppress the ghost image. The transmission and expansion of the light bearing image are completed by using planar waveguide and micro-reflector array embedded in the surface layer of waveguide. The image quality is improved by using the dual channel to eliminate ghost image. The imaging process of optical system is modeled and simulated. The surface micro-reflector array waveguide element of 3 mm thickness is prepared for verification. The whole optical system has the advantages of simple structure, easy preparation and high structural strength. The display field of view is shown to be 25°× 25°, and the size of the full field of view area is 15 mm with even light distribution. What's more, the uniformity of imaging intensity is better than 20%, and the image is clear without ghost image, which can effectively realize the fusion of the virtual image and the real environment. Thus, the efficiency of augmented reality is greatly improved, and the danger of human eye safety is effectively avoided.

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“…Un-edited AR view captured by a camera through a typical OST-HMD that lacks occlusion capability Recently there have been several different attempted solutions to achieve mutual occlusion in an OST-HMD. These attempts can be broken down into two clear categories: direct ray blocking occlusion, which involves the selective blocking of rays from a see-through scene without focusing them [3][4][5] and per-pixel modulation occlusion, which requires an objective optics to focus the see-through view at an intermediate image plane to selectively modulate the real scene pixel by pixel through an occlusion mask [6][7][8][9][10][11][12]. While both occlusion methods have their unique advantages, per-pixel modulation occlusion tends to be preferred when it comes to environment versatility, light efficiency, diffraction artifacts and accuracy of the occlusion mask(s).…”

Section: Introductionmentioning

confidence: 99%

40‐2: Demonstration of a Novel Single‐Layer Double‐Pass Optical Architecture for a Pupil‐Matched Occlusion‐Capable Optical See‐Through Head‐Mounted Display

Wilson

Hua

2020

Symp Digest of Tech Papers

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The rendering of mutual occlusion in optical see-through headmounted displays (OST-HMDs) poses several complex challenges. This paper discusses in detail these challenges and presents a novel optical architecture for enabling a compact, high performance, occlusion-capable optical see-through headmounted display (OCOST-HMD) with correct, pupil-matched viewing perspective. The proposed design utilizes a single-layer, double-pass architecture, offering a compact OCOST-HMD solution to alleviate several of the main issues facing the stateof-art OST-HMDs today. Our design is capable of rendering per-pixel mutual occlusion with correct viewing perspective between virtual and real views while achieving a very wide seethrough field of view (FOV) in a wearable formfactor. Based on this optical architecture, we design and build a compact binocular prototype. The prototype offers a virtual display with an FOV of 34° by 22° with a wide see-though FOV of 90° by 50°, within which about 40° diagonally is occlusion-enabled. Further, the prototype system affords an angular virtual display resolution of 1.06 arc minutes per pixel, along with a modulated optical see-through angular resolution of 1.0 arc minutes.

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Optical see-through head-mounted display with occlusion capability

Cited by 24 publications

References 0 publications

Projector-Based Augmented Reality for Quality Inspection Of Scanned Objects

Projector-Based Augmented Reality for Quality Inspection Of Scanned Objects

Surface Micro-Reflector Array for Augmented Reality Display

40‐2: Demonstration of a Novel Single‐Layer Double‐Pass Optical Architecture for a Pupil‐Matched Occlusion‐Capable Optical See‐Through Head‐Mounted Display

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