Kriengkrai Porkaew

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1 Introduction Advances in image processing, database management, and information retrieval has resulted in content-based multimedia retrieval to emerge as an important area of research. Typical content-based retrieval systems allow users to specify queries by providing examples of objects similar to the ones they wish to retrieve. Due to the subjective(More)
In dynamic spatio-temporal environments where objects may continuously move in space, maintaining consistent information about the location of objects and processing motion-specific queries is a challenging problem. In this paper, we focus on indexing and query processing techniques for mobile objects. Specifically, we develop a classification of different(More)
To address the emerging needs of applications that require access to and retrieval of multimedia objects we are developing the Multimedia Analysis and Retrieval System MARS in our group at the University of Illinois In this paper we concentrate on the retrieval subsystem of MARS and its support for content based queries over image databases Content based(More)
Unlike traditional database management systems, in multimedia databases that support contentbased retrieval over multimedia objects, it is di cult for users to express their exact information need directly in the form of a precise query. A typical interface supported by content-based retrieval systems allows users to express their information need in the(More)
In many applications, users specify target values for certain attributes/features without requiring exact matches to these values in return. Instead, the result is typically a ranked list of "top k" objects that best match the specified feature values. User subjectivity is an important aspect of such queries, i.e., which objects are relevant to the user and(More)
This paper presents a novel approach to representing 2-d shapes that adaptively models different portions of the shape at different resolutions, having higher resolution where it improves the quality of the representation and lower resolution elsewhere. The proposed representation is invariant to scale, translation and rotation. The representation is(More)
Large repositories of multimedia objects containing digital images, video, audio and text documents are becoming common. There is an increasing application need to search these repositories based on their content. Examples include online shopping (e.g., “Find me all shirts that look like this one), medical applications (e.g., “Find all tumors similar to a(More)
Unlike traditional database management systems, in multimedia databases that support content-based retrieval over multimedia objects, it is di cult for users to express their exact information need directly in the form of a precise query. A typical interface supported by content-based retrieval systems allows users to express their query in the form of(More)
During the past few years, content-based multime-dia retrieval has become one of the most active areas of research. Unlike traditional database queries, content-based multimedia retrieval queries are imprecise in nature which makes it diicult for users to express their exact information need in the form of a precise query right away. A typical interface(More)