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In this paper, we present an empirical study of 1,156 open source virtual reality (VR) projects from Unity List. Our study shows that the number of open source VR software projects are steadily growing, and some large projects attracting many developers are emerging. The most popular topic of VR software is still games. We also found that VR developers often face miss-commit of automatically generated...
Calibration between Lidar sensor and RGB cameras can be applied to various fields such as object recognition and tracking, 2D-3D mapping, and simultaneous localization and mapping (SLAM). Different methods for calibrating Lidar sensor and RGB cameras have been proposed using special 3D markers or calibration patterns. However, most of these methods have disadvantages of longer processing time, and...
Structured light 3D camera systems are composed of a commercial video projector and a machine vision camera. High scan speed structured light 3D camera systems, suffers synchronization problems due to a mismatch in the projector screen refresh rate, and camera capturing speed. Commercial video projectors project with fixed refresh rate, frame rate of machine vision camera's increase or decrease with...
We present a new non-von Neumann architecture, termed "Superstrider," predicated on no more than current projected improvements in semiconductor components and 3D manufacturing technologies, which should offer orders of magnitude advances in both energy efficiency and performance for many high-utility problem classes. The architecture is described, which is based on computing on row-wide...
The use of GPU in point cloud processing usually represents a gain in computation time more than ten times higher then on CPU, especially for large amounts of data. This paper brings an evaluation of the processing time for point cloud fusion in three different systems (PC, Nvidia TX1 and Nvidia TK1) using CPU and GPU. The objective is to find the best way to perform sensor fusion for an autonomous...
The results of the inclusion of Virtual Reality in the production line of an Industry Joalheira in the state of Bahia, a case study which was conducted in the elevenmonth period by a Startup consisting of two professional Designers and one Information Technology, between the years of 2008 and 2009. The production flow of this jewelery factory was losses due to continuous communication difficulties...
This paper presents a free hand interface for modeling virtual terrains in an augmented reality environment. A secondary contribution of this work is to present a study of a set of suitable gestures that allows the manipulation of virtual terrains interactively, using augmented reality markers and the Leap Motion Controller. To demonstrate the study, an application was developed to allow the user...
Autism Spectrum Disorder (ASD) is a behavioral syndrome with different etiologies, deeply affecting the process of child development. Children with ASD have some characteristics in common such as the inability to relate to other people, leading to isolation, communication disorders and obsessive concern for what is unchanging. In addition, these people may experience learning difficulties in various...
Smart TVs have been popularized in the last years, presenting continued innovation regarding different topics such as connectivity, platform support, and options for interaction. Examples of LG and Samsung present interaction options such as voice and gesture control, showing these emerging technologies that were previously tackled mainly on research investigations, as market alternative solutions...
We have witnessed the exponential growth of 3D GIS applications which vary from 3D urban management, a heritage city, archaeology, flood controlling, planning and designing, and government planning, to name a few. Thanks to the diversity of 3D models that are used to represent objects in reality and spatial database systems that are utilized to store spatial data, designers and developers can explore...
The article aims to present the results of a usability analysis of Augmented Reality systems developed for food packaging. For this, an evaluation of two applications available in the market was made, based on the heuristics proposed by Jakob Nielsen. Twenty-six specialists participated in the evaluation. From the results of the analysis, guidelines were generated for the elaboration of an application...
In recent decades, interest in capturing human face movements and identifying expressions for the purpose of generating realistic facial animations has increased in both the scientific community and the entertainment industry. We present a modular framework for testing algorithms used in performance-based facial animation. The framework includes the modules used in pipelines found in the literature...
Fear of flying is a real problem that affects the world's population. Approximately 25% of adults experience a significant increase in their anxiety levels when required to take any type of air transport and 10% of them avoid the situation. The approach that has proven to be the most effective in the treatment of phobias is in vivo exposure. However, the difficulty and the cost, and sometimes even...
Model based tracking techniques allow computing the pose of 3d objects without needing to use markers. In order to perform a precise tracking, these techniques have been using RGB-D sensors together with particle filters for evaluating several pose hypotheses of the object in a given frame from features such as points 3D coordinates, color and normal vector. This work presents a proposal to use of...
This work presents the development and validation of a natural interaction method in an immersive CAVE environment. The Microsoft Kinect was used to track the user actions, but only the infrared camera of the device was used, through a gesture recognition model developed by (LEITE, 2015). From such gesture recognition, a nre grammer was defined, as needed for an immersive environment such a the CAVE...
Recognition of human actions is an intelligent way for human-machine communication and Radial basis function (RBF) models are among the most powerful machines on this task. One prerequisite of using this traditional model is that the movement data must be translated into a vector space via the feature extraction process. Recent development of the convolutional neural networks (CNNs) has been shown...
According to International Roadmap for Devices and Systems (IRDS), after 2024, there is no headroom for 2D geometry scaling. By 2024, IRDS predicts that monolithic 3D integration technology will be one of the most critical performance boosters. This prediction follows the highly promising and relatively recent improvements on the fabrication of second-tier devices on a single substrate. In this study,...
This work proposes a method that allows the entry of text using the Google Cardboard, for this, uses gestures based on geometric forms and smartwatches. Thus, it is proposed the development of a prototype with the purpose of inserting a letter with no more than two user interactions. Gesture recognition is performed using the incremental recognition algorithm. After recognizing the gestures, they...
This work aims to present a methodology of communication between a criminal database and a virtual environment for forensic study, using a proprietary software and a virtual reality prototype, in order to support forensic science activities. The objective is to assist the forensic professional offering the use of criminal investigation resources inside a crime scene simulation, with sensations of...
Pairwise surface rigid registration aims to find the rigid transformation that best register two surfaces represented by point clouds. This work presents a comparison between seven algorithms, with different strategies to tackle rigid registration tasks. We focus on the frame-to-frame problem by using both point clouds and a RGB-D video stream in the experimental results. The former, is considered...
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