IMProVe 2011 - Proceedings

Image Processing and Analysis
Fast Correction of Tiled Display Systems on Planar Surfaces
C. Zoido (a), J. Maroto (a), G. Romero (a), J. Felez (a)
(a) CITEF – Universidad Politécnica de Madrid.
Abstract:
A method for fast colour and geometric correction of a tiled display system is presented in
this paper. Such kind of displays are a common choice for virtual reality applications and
simulators, where a high resolution image is required. They are the cheapest and more
flexible alternative for large image generation but they require a precise geometric and
colour correction. The purpose of the proposed method is to correct the projection
system as fast as possible so in case the system needs to be recalibrated it doesn’t
interfere with the normal operation of the simulator or virtual reality application. This
technique makes use of a single conventional webcam for both geometric and
photometric correction. Some previous assumptions are made, like planar projection
surface and negligible intra-projector colour variation and black-offset levels. If these
assumptions hold true, geometric and photometric seamlessness can be achieved for this
kind of display systems. The method described in this paper is scalable for an undefined
number of projectors and completely automatic.
Keywords: Tiled displays, Projection, Simulation, Blending, Geometric alignment
Corresponding Author: Jesus Felez
Tel.: +34 91 336 31 16
Fax.: +34 915 618 618
e-mail: jesus.felez@upm.es
Address: CITEF – Universidad Politécnica de Madrid. c/ José Gutierrez Abascal, 2. 28660 Madrid -
Spain.
Evolution of the Design and Decoration Processes
of Ceramic Tiles
B. Defez, F. Giménez Alcaide, V. Santiago, G. Peris-Farjarnés, T. Magal
(a) Centro de Investigación en Tecnologías Gráficas, Universidad Politécnica de Valencia
Abstract:
Ceramic tiles offer a technical and aesthetical solution very attractive for the covering of
any kind of floor, regardless size, employment and environmental constraints. The designs
of the decorated surface of the product have varied enormously since the beginning of the
employment of the ceramic tiles in construction, both in considering the creative phase
and the printing technology. In this work we relate the evolution of these two factors,
their relationship through time and the last tendencies of the sector, where digital image
processing and inkjet printing are gaining importance.
June 15 th – 17 th , 2011, Venice, Italy
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IMProVe 2011 - Proceedings