M. Teresa Escrig

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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)
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)
Our approach describes any digital image qualitatively by detecting regions/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 and(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)
An approach to distance sensor data integration that obtains a robust interpretation of the robot environment is presented in this paper. This approach consists in obtaining patterns of fuzzy distance zones from sensor readings; comparing these patterns in order to detect non-working sensors; and integrating the patterns obtained by each kind of sensor in(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)