Object (computer science)

About: Object (computer science) is a research topic. Over the lifetime, 106024 publications have been published within this topic receiving 1360115 citations. The topic is also known as: obj & Rq.

Method and apparatus for providing precise location information through a communications network

Abstract: A method and apparatus for obtaining information about an object through interaction between a mobile station (MS) and a computer network such as the Internet, and communicating the information to the MS. A digital camera obtains an image of an object, such as a geographic region proximate the MS, which is then transmitted through the mobile communications system to the computer network. A converter server such as an Optical Character Reader (OCR) server interfaced with the global computer network converts the digital image to a text format which is then compared, along with a general location identifier of the MS to geographic data stored in a location database connected to the global computer network. Based on a comparison of the converted text data and the general location identifier of the MS to the geographic data stored in the location server, a precise location of the MS is determined and transmitted to the MS.

Objects with roles

Abstract: The use of object-oriented conceptual models for modeling office applications and information systems is discussed. A model for describing object behavior based on the concept of role is presented. Roles allow one to describe different perspectives for object evolution. For each role, relevant characteristics such as role properties, role states, messages, and role-state transition rules and constraints are defined. The implications of considering several roles in parallel for an object are discussed, and a classification of possible role interactions is given.

Single-camera tracking of an object

Abstract: A method and system for determining the position and orientation of an object (150) is disclosed. A set of markers (104) attached or associated with the object (150) is optically tracked and geometric translation is performed (110) to use the coordinates of the set of markers (104) to determine the location and orientation of their associated object (150).

Techniques for efficient road-network-based tracking of moving objects

Abstract: With the continued advances in wireless communications, geo-positioning, and consumer electronics, an infrastructure is emerging that enables location-based services that rely on the tracking of the continuously changing positions of entire populations of service users, termed moving objects. This scenario is characterized by large volumes of updates, for which reason location update technologies become important. A setting is assumed in which a central database stores a representation of each moving object's current position. This position is to be maintained so that it deviates from the user's real position by at most a given threshold. To do so, each moving object stores locally the central representation of its position. Then, an object updates the database whenever the deviation between its actual position (as obtained from a GPS device) and the database position exceeds the threshold. The main issue considered is how to represent the location of a moving object in a database so that tracking can be done with as few updates as possible. The paper proposes to use the road network within which the objects are assumed to move for predicting their future positions. The paper presents algorithms that modify an initial road-network representation, so that it works better as a basis for predicting an object's position; it proposes to use known movement patterns of the object, in the form of routes; and, it proposes to use acceleration profiles together with the routes. Using real GPS-data and a corresponding real road network, the paper offers empirical evaluations and comparisons that include three existing approaches and all the proposed approaches.

Rich media collaboration system

Abstract: A user annotates a shared document with text, sound, images, video, an e-mail message, graphics, screen snapshots, web site snapshots to share with others. The document and its annotations are stored in a digital object repository to which other users have access. Within the closed collaboration system, only users who are authenticated may upload digital objects, annotate digital objects and view objects and their annotations. The user sends a message to other users to invite them to view the object and its annotations and to add their own annotations. An annotated object generates an alert for all of the invited users. A remote authentication gateway authenticates users and has a repository for user metadata. Digital object repositories are separate from the authentication gateway, thus providing for disintermediation of the user metadata from the digital object data. The collaboration system may be hosted by a third party on a server computer available over the Internet that displays a web site. A user is not required to have collaboration system software on his or her computer and may annotate any image on the web site for later viewing by other users of the web site.