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Retrieving images from large and varied collections using image content as a key is a challenging and important problem. We present a new image representation which provides a transformation from the raw pixel data to a small set of image regions which are coherent in color and texture. This " Blobworld " representation is created by clustering pixels in a(More)
Blobworld is a system for image retrieval based on nding coherent image regions which roughly correspond to objects. The image is segmented into regions by tting a mixture of Gaussians to the pixel distribution in a joint color-texture-position feature space. Each region (\blob") is then associated with color and texture descriptors. Querying is based on(More)
Retrieving images from large and varied collections using image content as a key is a challenging and important problem. In this paper we present a new image representation which provides a transformation from the raw pixel data to a small set of image regions which are coherent in color and texture space. This so-called " blobworld " representation is(More)
Retrieving images from very large collections, using image content a s a k ey, is becoming an important problem. Users prefer to ask for pictures using notions of content that are strongly oriented to the presence of abstractly deened objects. Computer programs that implement these queries automatically are desirable, but are hard to build because(More)
Retrieving images from very large collections using image content as a key is becoming an important problem. Classifying images into visual categories and finding objects in image databases are two major challenges in the field. This paper describes our approach toward the first of the two tasks, the generalization of which we believe will assist in the(More)
The Bulletin of the Technical Committee on Data Engineering is published quarterly and is distributed to all TC members. Its scope includes the design, implementation, modelling, theory and application of database systems and their technology. Letters, conference information, and news should be sent to the Editor-in-Chief. Papers for each issue are(More)
Genomic array technologies provide a means for profiling global changes in gene expression under a variety of conditions. However, it has been difficult to assess whether transcriptional or posttranscriptional regulation is responsible for these changes. Additionally, fluctuations in gene expression in a single cell type within a complex tissue like a tumor(More)
We study the problem of identifying uninteresting content in text streams from micro-blogging services such as Twitter. Our premise is that truly mundane content is not interesting in any context, and thus can be quickly filtered using simple query-independent features. Such a filter could be used for tiering indexes in a micro-blog search engine, with the(More)
Blobworld is a system for image retrieval based on nding coherent image regions which roughly correspond to objects. Each image is automatically segmented into regions (\blobs") with associated color and texture descriptors. Querying is based on the attributes of one or two regions of interest, rather than a description of the entire image. In order to make(More)