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Our approach describes any digital image qualitatively by detecting re-gions/objects inside it and describing their visual characteristics (shape and colour) and their spatial characteristics (orientation and topology) by means of qualitative models. The description obtained is translated into a description logic (DL) based ontology, which gives a formal(More)
Service robots need a cognitive vision system in order to interact with people. Human beings usually use their language to describe their environment and, as qualitative descriptions can be easily translated into language, they are more understandable to people. The main aim of this paper is to define an approach which can obtain a unique and complete(More)
A new method for qualitative shape recognition and matching of objects in designs is presented in this paper. The approach consists of a reference-points information approach of the qualitative description of shapes considering qualitatively their angles, relative side length, concavities and convexities, and types of curvatures of the boundary. The shapes(More)
Space and time has been integrated into three qualitative models in this article: a qualitative motion model which integrates topology and time, a qualitative velocity model in 2-D and a qualitative velocity model in 3-D. The integration has been accomplished thanks to the definition of an approach with the following three steps: (1) the definition of the(More)
This paper presents the intelligent and automatic application developed in order to assembly ceramic mosaics. The application consists on given an image with different objects (representing real tiles) and a vectorial image design of a ceramic tile mosaic, the application recognizes in a qualitative way which tile in the image belongs to the mosaic design(More)
An approach for representing and reasoning with 3-D qualitative orientation of point objects is presented in this paper. The model in 3-D is an extension of the Zimmerman and Freksa's orientation model in 2-D. The paper presents several attempts to represent 3-D spatial orientation, why those first attempts did not work and how problems which have been(More)