fast, shape based image retrieval
The paper presents a method for fast access by content into database (DB) of images. The method proposed is based on the image tree of contours defined for graphic images, as well as on the one-dimensional complex Fourier transform of the contours. In this way, problems connected with the image normalization concerning translation, rotation, scaling, reflection and intensity are currently solved. The most informative data of the image are ordered by importance in a key of fixed length, on which the fast access is performed using the well-known index access methods of a conventional DB management system (DBMS). The method is tested on a DB of about 4000 images of hallmarks. The experimental system EIRS, intended for the Bulgarian Patent Office practice, is also described here in brief.
fourier's transform of contours content based image retrieval (cbir) fast image retrieval image databases representation of graphic images