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We present in this paper a novel warehouse inventory scheme. The main purpose of this work is to make the inventory process completely autonomous. To this end, an Unmanned Ground Vehicle (UGV) and an Unmanned Aerial Vehicle (UAV) work cooperatively. The UGV is used as the carrying platform, and considered as a ground reference for the indoor flight of the UAV. While the UAV is used as the mobile scanner...
In this paper, we present a new type of trading card (called Stereo Cards) designed for a table-top Augmented Reality (AR) game environment. The main goal of Stereo Cards is to replace the current trading cards used in collectable card games such as Magic: The Gathering, YuGiOh, and Pokemon. The superior point of Stereo Cards is that they are computationally detectable and recognisable, e.g. they...
In the medical field, research studies have shown that Augmented Reality (AR) based surgical training has a good potential in making the learning process more active. However, lack of displaying the correct occlusion between the real surgical instrument and virtual organ greatly limits the trainee surgeons understanding and reduces the overall system usability. In this paper, we propose a novel mutual...
Augmented reality is an interesting field which use live video imagery to add virtual data to the real world. In this paper, we firstly present a review of recent applications of augmented reality. One of the recent application of the augmented reality is the use of video projection to provide a more comfortable interaction with display devices without any hardware equipment. Thus, we secondly present...
In recent papers, the concept of an intelligent window for machine tools (iWindow) using virtual and augmented reality in order to replace traditional windows in machine tools was introduced. Such intelligent windows provide additional possibilities for observing the machine interior under difficult visibility conditions, combine and reduce the number of supporting systems and enrich the machine interior...
Content authoring is one of essentials of Augmented Reality (AR), which is to emplace an augmented content on a true part of a real scene in order to enhance users' visual experience. For the case of street view single 2D images, the challenge emerges because of clutter environments and unknown position and orientation related to camera pose. Although existing methods based on 2D feature point matching...
The current paper presents the Quiz Cube application and its evaluation. The Quiz Cube application is an AR mobile learning application for students and teachers to easily make and use AR UI system using fiducial marker cubes. AR as a platform is just now reaching its full potential. Since smartphones and mobile devices are now at a sufficiently large user base, it is worth looking at the potential...
In this paper we design a novel planar 2D fiducial marker and develop fast detection algorithm aiming easy camera calibration and precise 3D reconstruction at the marker locations via the bundle adjustment. Even though an abundance of planar fiducial markers have been made and used in various tasks, none of them has properties necessary to solve the aforementioned tasks. Our marker, X-tag, enjoys...
This paper introduces a case in which cultural heritage is communicated by combining historical narrative with Mixed Reality (MR) technology. The art of representing intangible heritage and making abstract and complex transformations comprehensible with MR technology is being discussed through a case example. MR application Sanan seppä (“Wordsmith”) represents the history of the Protestant Reformation...
Augmented Reality (AR) is aimed at integrating virtual information into real world to enhance the perception ability of reality. The paper mainly presents an AR system that can complete some interactions between the user and the smartphone based on touch screen and body motion. There are three contents in this system. The first part is the building of AR scenes in Unity3D on the basis of real-time...
Haptic virtual fixtures have a key role in telepresence systems to enhance spatial perception as well as to improve task efficiency. However, there are some difficulties in bringing real and virtual constraints together due to the extremely different characteristics of their representations. This paper proposes a unified virtual fixture model for the telepresence systems to combine the autonomously...
Augmented Reality (AR) is currently gaining popularity in multiple professional use cases. However, applying AR for outdoor environments is still very difficult, especially when targeting customer-grade mobile devices. This paper presents extensions to a previous panoramic tracking algorithm, which is a visual tracking method for unprepared outdoor use cases. The panorama tracker is extended by Unity3D...
We have developed a collaborative system for location-based AR that enables users to handle virtual object by simple hand gestures. Through a combination of depth sensor and motion capture system, it makes possible to calculate global coordinates of hands and recognize hand gestures without pattern images or hand mounted instruments. We believe that this system would be useful for inter-user communication...
Projectors are important display devices for large scale augmented reality applications. However, precisely calibrating projectors with large focus distances implies a trade-off between practicality and accuracy. People either need a huge calibration board or a precise 3D model [12]. In this paper, we present a practical projectorcamera calibration method to solve this problem. The user only needs...
It has been shown in numerous studies that the application of Augmented Reality (AR) to teaching and learning is beneficial, but determining the reasons behind its effectiveness, and in particular the characteristics of students for whom an AR is best suited, can bring forth new opportunities to integrate adaptive instruction and AR in the future. Through a quasi-experimental research design, our...
Discrepancy check is a well-known task in industrial Augmented Reality (AR). In this paper we present a new approach consisting of three main contributions: First, we propose a new two-step depth mapping algorithm for RGB-D cameras, which fuses depth images with given camera pose in real-time into a consistent 3D model. In a rigorous evaluation with two public benchmarks we show that our mapping outperforms...
In this paper we propose a novel method called s-DVO for dense visual odometry using a probabilistic sensor noise model. In contrast to sparse visual odometry, where camera poses are estimated based on matched visual features, we apply dense visual odometry which makes full use of all pixel information from an RGB-D camera. Previously, t-distribution was used to model photometric and geometric errors...
In the paper, we describe the extensions of the 3D-HEVC compression technology aimed at improved compression efficiency for multiview sequences acquired from arbitrarily located cameras. Our proposal refines the inter-view prediction by replacing the horizontal shifts with the true mapping in the 3D space. This implies changes in several coding tools, which we describe in details. The paper also reports...
With the rapid development of Virtual and Augmented Reality systems, it becomes more and more important to develop an efficient calibration method for optical see-through head-mounted displays (OST-HMDs). In this paper, a modular calibration framework with two calibration phases is proposed. In the first phase, an eye-involved equivalent camera model is proposed in order to compute the spatial position...
We present an optical see-through augmented reality system. The system features optical see-through calibration, object tracking, virtual scene rendering and gesture interaction. Compared with video see-through augmented reality system, the optical see-through system requires more accurate alignment between the virtual and the real scene. Our system calibration is done using natural feature based...
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