Search results for "free-form"
showing 6 items of 6 documents
Fuzzy C-Means Inspired Free Form Deformation Technique for Registration
2009
This paper presents a novel method aimed to free form deformation function approximation for purpose of image registration. The method is currently feature-based. The algorithm is inspired to concepts derived from Fuzzy C-means clustering technique such as membership degree and cluster centroids. After algorithm explanation, tests and relative results obtained are presented and discussed. Finally, considerations on future improvements are elucidated.
The Cuneiform Brick
2022
The study presents some results of an experimental research on brick wall cladding, proposing methodological approaches for the creation of new geometric-compositional configurations. Citing innovative case studies of historical and contemporary architecture, the research has allowed to determine a different geometric shape of the brick, which takes its cue from the traditional wedge-shaped brick in majolica brick, widespread in Sicily since the sixteenth century for the realization of cusps and domes. Through the definition of procedural parametric algorithms for the analysis and geometric-spatial control, it is described the path that led to the digital prototype of a modular component of…
Catoptric Anamorphosis on Free-Form Reflective Surfaces
2020
Lo studio si concentra sulla definizione di una metodologia geometrica per l’impiego dell’anamorfosi catottrica nell’architettura contemporanea. Viene illustrato il particolare fenomeno proiettivo, mostrandone proprietà tipologico-geometriche, rispondenti a meccanismi di riflessione della luce. Si evidenzia che le esperienze pregresse, nel corso dei secoli, impiegano la tecnica, relegando la realizzazione esclusivamente a dispositivi riflettenti realizzati da geometrie semplici, a piccola scala e quasi esclusivamente per specchi convessi. Volendo estendere l’impiego del fenomeno proiettivo e sperimentare le potenzialità espressive su superfici riflettenti di natura geo- metrica complessa fr…
Curvilinear constraints for free form deformations on subdivision surfaces
2010
This paper presents a method to deform a subdivision surface with curvilinear constraints. It combines an intuitive free form deformation with a Loop subdivision algorithm. The main advantage of this method of deformation is that it uses only vertices of an object and satisfies the geometrical constraints provided by the user. It permits us to control the final shape of the deformed object, defining the range (i.e. the impact) of the deformation before applying it. The deformation takes into account the Loop properties to follow the subdivision scheme, allowing the user to fix some curvilinear constraints at the subdivision level he works on and to render the final object at the level he wa…
Fuzzy-based Kernel Regression Approaches for Free Form Deformation and Elastic Registration of Medical Images
2009
In modern medicine, a largely diffused method for gathering knowledge about organs and tissues is obtained by means of merging information from several datasets. Such data are provided from multimodal or sequential acquisitions. As a consequence, a pre-processing step that is called “image registration” is required to achieve data integration. Image registration aims to obtain the best possible spatial correspondence between misaligned datasets. This procedure is also useful to correct distortions induced by magnetic interferences with the acquisition equipment signals or the ones due patient’s involuntary movements such as heartbeat or breathing. The problem can be regarded as finding the …
Session III - PARAMETRIC MODELLING AND VIDEO MAPPING_INTRODUCTION
2022
Virtual representation, free-form surface modelling techniques and numerical control manufacturing, with their intrinsic dynamic and interactive capabilities, have profoundly expanded and enriched the repertoire of geometric shapes, generating innovative design skills and creative languages. There is no doubt about the opportunities for exploration, contamination, relationships and overlapping of ideas, measurements and information, which the continuous evolution of expeditious, parametric and automatic procedures brings to the use of the many products of the information age. Adopting computation as a form of design is profoundly different from simply using tools geared toward increasing th…