NDLI: Boosting contextual information in content-based image retrieval

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Boosting contextual information in content-based image retrieval

Content Provider	ACM Digital Library
Author	Gevers, Theo Smeulders, Arnold Amores, Jaume Radeva, Petia Sebe, Nicu
Abstract	We present a new framework for characterizing and retrieving objects in cluttered scenes. Objects are best represented by characterizing both their parts and the mutual spatial relations among them. This CBIR system is based on a new representation describing every object taking into account the local properties of its parts and their mutual spatial relations, without relying on accurate segmentation. For this purpose, a new multi-dimensional histogram is used that measures the joint distribution of local properties and relative spatial positions. Instead of using a single descriptor for all the image, we represent the image by a set of histograms covering the object from different perspectives. We integrate this representation in a whole framework which has two stages. The first one is to allow an efficient retrieval based on the geometric properties (shape) of objects in images with clutter. This is achieved by i) using a contextual descriptor that incorporates the distribution of local structures, and ii) taking a proper distance that disregards the clutter of the images. At a second stage, we introduce a more discriminative descriptor that characterizes the parts of the objects by their color and their local tructure. By sing relevant-feedback and boosting as a feature selection algorithm, the system is able to learn simultaneously the information that characterize each part of the object along with their mutual spatial relations. Results are reported on two known databases and are quantitatively compared to other successful approaches.
Starting Page	31
Ending Page	38
Page Count	8
File Format	PDF
ISBN	1581139403
DOI	10.1145/1026711.1026717
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2004-10-15
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Content-based image retrieval oject recognition Contextual information Boosting
Content Type	Text
Resource Type	Article

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