Research on the influence of reference frames has generally focused on visual phenomena such as the oblique effect, the subjective visual vertical, the perceptual upright, and ambiguous figures. Another line of research concerns mental rotation studies in which participants had to discriminate between familiar or previously seen 2-D figures or pictures of 3-D objects and their rotated versions....

Parametric modelling approach applied to cultural heritage virtual representation is a field of research explored for years since it can address many limitations of digitising tools. For example, essential historical sources for fortification virtual reconstructions like plans-reliefs have several shortcomings when they are scanned. To overcome those problems, knowledge based-modelling can be u...

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We present an algorithm which splits a 3D surface into reliefs, relatively flat regions that have smooth boundaries. The surface is then resampled in a regular manner within each of the reliefs. As a result, we obtain a piecewise regular mesh (PRM), having a regular structure on large regions. Experimental results show that we are able to approximate the input surface with the mean square error...

The paper proposes a computer-oriented interpretation of the laws ruling the elevation of gures in basor high-relief sculptures, and presents some simple algorithms and a prototypal, public-domain software tool for the generation of 3D basand high-reliefs starting from 3D surface models.

Recent developments in interferometric radar technique largely highlighted potentialities of radar interferometry for the generation of high resolution DEM (Digital Elevation Models). Nevertheless, the performances of this almost automatic process are strongly degraded for tortured reliefs and for vegetation areas. A research in progress with the CNES (Centre National d'Etudes Spatiales), CSSI ...