A system that enables rhe pictorial specification of queries in an image database is described. The queries are comprised of rectangle, polygon, ellipse, and E-spline shapes. The queries specib which shapes should appear in the target image as well as spatial constraints on rhe distance between them and their relative position. The retrieval process makes use of an abstraction of the contaur of the shape which is invariant against translation, scale, rotation, and starring point that is based on the use of Fourier descriptors. These absrractions are used in a system io locate logos in an image database. The utilitj of this approach is illustrated using some sample queries.
An extraction of Fourier descriptors of an edge making them invariant to scale, rotation and translation for locating the Logos in the image database are attempted by the author Andre Folkers et al. REF .
Content-based image retrieval using Fourier descriptors on a logo database
Object recognition supported by user interaction for service robots
Object recognition supported by user interaction for service robots
Computer Science