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In this paper we introduce a network of static and mobile agents which collaborate to process information requests by mobile users. The agents help users to define their information needs, process their requests by deploying themselves on devices near the information requested, and obtain results from users and their mobile devices, in a continuous way.
This research aims to study the customers' preferences ranking of smartphone attributes and the price range preferences among Taiwanese customers. A modified AHP is conducted in order to meet the research objective. Smartphone features were selected from previous research to construct the hierarchy structure. The AHP scale between two criteria was simplified to 0 ∼ 1 in order to conduct an online...
Analysis of traffic signal and ensure the safety of visually impaired people is a major challenge in helping disabled people. In this paper, we propose development of an application software which can be easily installed on a mobile device equipped with a camera. This application opens a camera and captures the traffic timer display upon tapping the app-icon. The timer image is then processed to segment...
High dynamic range (HDR) images are highly desirable and widely applied in our daily life. However, most conventional digital cameras are only able to capture low dynamic range (LDR) images. To produce HDR images, a popular and effective method is to merge multiple LDR images with different exposure settings. To achieve high quality HDR images, determining the exposure settings when capturing the...
Vision based localization has been investigated for many years. The existing Structure from Motion (SfM) technique can reconstruct the 3D models based on the input images. The image retrieval and feature matching allow us to find the correspondence between the query image and the 3D model. According to these, the location can be easily calculated. In mobile scenarios, the limited CPU speed, memory...
Digital technologies enable indoor location management for determining and tracking the position of a person through various sensing mechanisms. This emerging area has a wide range of applications in the service industry to improve business processes. Location management is aided by the proliferation of mobile devices which open many exciting possibilities with their rich sensor set. We present a...
Document scanning is a daily office work. However, traditional devices like flatbed scanners are not easy to carry for mobile work. In this paper, we present a new document image scanning method using a mobile device. With a clip of continuous video capturing, our approach first extracts several key-frames. A mobile GPU based image stitching method is adopted to generate a high resolution document...
Usage areas of mobile phones have increased in the last 10 years. Although there have been improvements in many areas, most of the developments are in the field of positioning systems. Although the people's lives continue in indoor environments, location-based information system receives data from the satellites, which can detect a person's location in outdoor areas. In indoor areas, satellite signals...
This paper presents a system for 3D reconstruction of large-scale outdoor scenes based on monocular motion stereo. Ours is the first such system to run at interactive frame rates on a mobile device (Google Project Tango Tablet), thus allowing a user to reconstruct scenes "on the go" by simply walking around them. We utilize the device's GPU to compute depth maps using plane sweep stereo...
The theoretical and practical aspects of applying the analytic hierarchy process to choose the preferred type of mobile phone based on combination technical and economic parameters of quality and expert judgment.
Augmented reality for natural images on mobile devices is currently a research focus. Traditional methods augment natural images mainly by projecting virtual models, putting texts, audio and videos on the images. In this paper, we introduce image composition and image special effects into applications of augmented reality, and proposed an augmented reality method with image composition and image special...
This paper presents an empirical study on mining comparative sentences for Vietnamese language. Given a set of evaluative Vietnamese documents, the goal of comparative sentence mining consists of (1) identifying comparative sentences in the documents, and (2) recognition of relations in identified comparative sentences. A relation describes a comparison of two entities or two sets of entities in some...
A new approach for lightweight video-based object recognition is introduced where a user moves a camera around a target object of interest. The extraction of image features and the retrieval algorithm is running in a lightweight mobile computer (tablet or phone). We apply a view based model of the objects and the matching of the query and candidate images is based on compact image descriptors coupled...
Mobile phones have been the trending and indispensable devices to many people these days. With the advancement of science and technology, inexpensive and versatile phones can be easily found at one's disposal. The field of Optical Character Recognition (OCR) is also promoted, as OCR mobile applications are increasingly chosen. This paper addresses an approach to solve one challenging issue of OCR,...
Considering the situation that performing indoor positioning system on mobile platform mostly relying on additional wireless signal and known environmental information, we propose an autonomous combination positioning method aimed at continuously estimating metric position and pose in an unknown scene. The vision-based SLAM algorithm extracts the image characteristics of the environment for producing...
This paper presents a generic obstacle detection system using single camera image sequence processing, for Android smart mobile devices. The algorithm relies on transforming the images into bird eye views of the scene using Inverse Perspective Mapping, followed by intensity based segmentation. The obstacle area hypotheses are used for updating a particle based occupancy grid. The sensors built in...
This paper discusses a process of data collection from remote sensors and presentation on mobile devices. The presented research and work in this paper is done in the scope of REDIRNET project. The main motivation in the project is to support the rescuers facing operational problems in accessing and analyzing information from multiple sources, and providing advanced features for command and control...
Recently, smart phones are usually equipped with cameras and motion sensors. This means that mobile phones have become good platforms to deploy augmented reality (AR) applications. We propose a new tracking system for AR which uses inertial measurement units (gyroscope, accelerometer and magnetic field sensor) combined with a camera to automatically detect and track a dominant plane in the scene without...
Mobile smart devices are standard equipment of an average person. While being designed to be used by a fully fit person, they can be helpful for impaired ones, even those who due to blindness are considered unable to operate a touchscreen. In this paper we present an experimental “Image edges locator” application, developed for mobile devices with Android OS. The idea was “if you can't see it, try...
Mobile surveillance systems like vehicle mounted cameras (i.e. police dash cams) and body cameras play an important role in securing physical spaces. However, these systems can generate too much data that hampers timely analysis. Furthermore, existing infrastructure wireless networks may not have sufficient bandwidth to support real time streaming of videos to backend servers. This paper presents...
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