Abstract
Observations recorded by telescopes are ususally stored in large, multidimensional archives, composed nowadays often of images. As these archives constantly grow in size, a content-based information retrieval system must be developed to allow queries by browsing or comparing. However, fast browsing requires transforming the images into smaller representations, or icons, which can be stored on fast access devices, displayed efficiently, and be used also for searching similarities between images. To this end, the information content of images must be extracted, selected, and stored in a compressed format. Its visualization must subsequently only evidence the most relevant parts of the observations when browsing.
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