Krassimir Markov

Features for art painting classification based on vector quantization of MPEG-7 descriptors

An approach for extracting higher-level visual features for art painting classification based on MPEG-7 descriptors is presented in this paper. The MPEG 7 descriptors give a good presentation of different types of visual features, but are complex structures. This prevents their direct use into standard classification algorithms and thus requires specific processing. Our approach consists of the following steps: (1) the images are tiled into non-overlapping rectangles to capture more detailed information; (2) the tiles of the images are clustered for each MPEG 7 descriptor; (3) vector quantization is used to assign a unique value to each tile, which corresponds to the number of the cluster where the tile belongs to, in order to reduce the dimensionality of the data. Finally, the significance of the attributes and the importance of the underlying MPEG 7 descriptors for class prediction in this domain are analyzed.

An approach to class diagrams verification according to SOLID design principles

An approach, verifying class diagram correspondence to SOLID Design Principles, is proposed in this paper. SOLID is an acronym, encapsulating the five class diagram design principles namely: Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation and Dependency Inversion. To check whether a class diagram meets to SOLID, its analytical representation is analyzed by means of predicate expressions. For every SOLID design principle corresponded predicate expressions are proposed. Analytical representation describes interaction of class diagram constituents, namely classes and interfaces, in set-theory terms. Also criteria for estimation of obtained results are formulated. Example of class diagram verification according to the suggested verification approach is also represented in this paper. The advantages of the proposed verification approach implementing to improve the quality of different software development lifecycle processes are outlined in the conclusions.