Prof. Eva Bordeaux Profile

Prof. Eva Bordeaux

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Proceedings Article | 25 October 2005 Paper

Image retrieval based on local grey-level invariants

Eva Bordeaux, Neelima Shrikhande

Proceedings Volume 6006, 600607 (2005) https://doi.org/10.1117/12.629682

KEYWORDS: Databases, Image retrieval, Buildings, Sensors, Infrared imaging, Convolution, Object recognition, Corner detection, Detection and tracking algorithms, Mahalanobis distance

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During past decades, the enormous growth of image archives has significantly increased the demand for research efforts aimed at efficiently finding specific images within large databases. This paper investigates matching of images of buildings, architectural designs, blueprints and sketches. Their geometrical constrains lead to the proposed approach: the use of local grey-level invariants based on internal contours of the object. The problem involves three key phases: object recognition in image data, matching two images and searching the database of images. The emphasis of this paper is on object recognition based on internal contours of image data. In her master's thesis, M.M. Kulkarni described a technique for image retrieval by contour analysis implemented on external contours of an object in an image data. This is used to define the category of a building (tower, dome, flat, etc). Integration of these results with local grey-level invariant analysis creates a more robust image retrieval system. Thus, the best match result is the intersection of the results of contour analysis and grey-level invariants analysis. Experiments conducted for the database of architectural buildings have shown robustness w.r.t. to image rotation, translation, small view-point variations, partial visibility and extraneous features. The recognition rate is above 99% for a variety of tested images taken under different conditions.

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