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Indoor positioning system is a rapidly emerging technology. Unlike outdoor positioning, which uses triangulation from satellites in line-of-sight, current indoor positioning methods attempt triangulation using Received Signal Strength Indicator (RSSI) from indoor transmitters, like WiFi and RFID. These methods, however, are not accurate and suffer from issues like multi-path and absorption by walls...
Navigation and mapping in relatively featureless underwater and under-ice environments is a difficult challenge. Using common sensors already onboard many unmanned underwater vehicles to aid in this process provides a self-contained and cost-effective solution. Evaluation of such visual navigation and mapping methods under development requires multiple UUVs to gather the required sonar and video data...
Dyslexia or reading disability is a disorder manifested by difficulty in learning to read despite conventional instruction, adequate intelligence, and sociocultural opportunity. In this paper we focus on the potential benefits of the use of Information and Communication Technology (ICT) especially for students with dyslexia. For this purpose, we present a brief overview of the most representative...
During the past couple years, several Chinese and Latin American research communities have established and strengthened notable collaborative ties, in the fields of urban computing, virtual reality and visualization. These endeavors culminate in 2016 as the Sino-Latin America Birds of a Feather (SLA-BOF) event at the International Conference on Virtual Reality and Visualization (ICVRV). In this event...
A major challenge in developing Mixed Reality (MR) applications is the lack of a generic framework that can be used for easy development of MR applications employing multimodal user interaction techniques. The main objective of having such framework is that, whenever needed, it should be possible to simply design and develop a complete MR application to provide an immersive user experience based on...
Visually impaired community rely on many artificial aids which allow them to lead an average life in the complex modern society. Identification of currency notes is of utmost importance in this regard and many electronic currency note recognizers have been developed. Nevertheless, a compact, accurate and a cost effective recognizer optimized for local currency notes is highly preferred. In this paper...
The standard polysomnographic method for detecting periodic limb movements in sleep (PLMS) includes measuring the electromyography (EMG) signals from electrodes at the left and right tibialis anterior muscles. This procedure has disadvantages as the cabling affects the patients quality of sleep and the electrodes tend to come off during the night, deteriorating data quality. We used contactless monitoring...
Alpha-band rhythm is thought to be involved in memory processes, similarly to other spontaneous brain rhythms. Ten right-handed healthy volunteers participated in our proposed sequential short-term memory task that provides a serial position effect in accuracy rate. We recorded alpha-band rhythms by magnetoencephalography during performance of the task and observed that the amplitude of the rhythm...
As one of the several characteristics of hemiplegic patients after stroke, the patients conduct sit-to-stand and stand-to-sit (STS) motion using their unaffected leg. The purpose of this study is to develop a STS motion support system for helping the patients decrease the difference of the usage ratio between the affected side and the unaffected side, and increase the usage of the affected leg. The...
In this paper, an enhanced mobility manager will be presented to overcome many drawbacks of Castalia's traditional mobility manager. The presented mobility manger can deal with paths rather than lines. This will allow users to simulate nodes moving with any possibilities within the simulation space. Additionally a 3D visualization engine will be integrated so that users can visualize their simulated...
As an important research area in image analysis and computer vision, fusion of infrared and visible images aims at delivering an effective combination of image information from different sensors. Since the final fused image is the demonstration of fusion process, it should reveal both source images' vital information distinctly. To achieve this purpose, an image fusion method based on multiscale hybrid...
Migration birds are able to navigate themselves during a long-distance journey without getting lost. They actually achieve just what is being sought for in the field of Unmanned Aerial Vehicles (UAVs): long-term autonomous navigation. This paper proposes an approach that combines the migration birds' sense principles with Micro-Electro-Mechanical System (MEMS) sensors to estimate UAVs position within...
Seeing (surveillance) but not understanding (poor security performance)" is common problem in most security systems. Although in recent years significant progress has been achieved in biometric identification technology, the progress of single technologies does not dramatically improve the overall performance or solve the system-level problems of social security. Currently in addition to improvements...
The article presents an approach where the visual odometry from the stereo camera is fused with the inertial measurements using an error-state extended Kalman filter. A simplified strapdown inertial mechanization is used to predict the orientation and position of the user while the measurements of the visual odometry are employed to reduce the fast position drift of a pure inertial approach. Within...
This paper presents a silicone retractor, which is a continuation and extension of a previously developed system that had the same three functions as the old version: 1) retracting, 2) suction, and 3) force sensing. These features make the retractor a safe choice for use in neurosurgery. Suction is achieved by attaching the retractor to a suction pipe. The retractor has a deformation area filled with...
Image Based Rendering (IBR) is a field of research whose basic aim is to generate a three-dimensional model of a scene using a set of two-dimensional images. This can be used to generate novel 2D views of the scene. Photo-consistency is one of the most widely accepted tools for high quality image based rendering (IBR). The aim of this paper is two-fold: (a) give a short summary about the photo-consistency...
A visual odometry system using a stereo camera is presented for position control of an aircraft relative to its surroundings. The algorithm is validated using a common dataset and its performance is evaluated for real-time operation on-board micro-aerial vehicles. Disparity maps are generated to be used for reactive obstacle avoidance.
This paper presents an orientation estimation methods using inertial cues (IMU) and visual feature constraint. Our proposed approach combines both of these two modalities in an original way. Two feature-point correspondences between consecutive frames are firstly selected that not merely meet the requirement of descriptor similarity constraint but the locality constraint. Secondly, these two selected...
The 3D representation of the world visual information has been a challenge for a long time both in the analogue and digital domains. At least in the past decade, 3D stereo-based solutions have become very common. However, several constraints and limitations ended up causing a negative impact on its user popularity and market deployment. Recent developments in terms of acquisition and display devices...
This work addresses the creation of a development framework where application developers can create, in a natural way, im-mersive physical activities where users experience a 3D first-person perception of full body control. The proposed frame-work is based on commercial motion sensors and a Head-Mounted Display (HMD), and a uses Unity 3D as a unifying environment where user pose, virtual scene and...
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