Abstract Matthias Schröder has asked the question whether there is a weakest discontinuous problem in topological version of Weihrauch lattice. Such can be considered as unsolvable problem. We introduce discontinuity , and we show that it reducible exactly to effectively problems defined suitable way. However, which sense this answers Schröder’s sensitively depends on axiomatic framework chosen...

This paper deals with the handling of deformable linear objects (DLOs), such as hoses, wires or leaf springs. It investigates the a priori knowledge about the 6-dimensional force/torque signal for a changing contact situation between a DLO and a rigid polyhedral obstacle. The result is a complete list, containing for each contact change the most significant combination of force/torque signal co...

Hiroyoshi Kubo, a,1,2 Anton J. M. Peeters, b,1 Mark G. M. Aarts, c Andy Pereira, c and Maarten Koornneef b a Department of Biology, Faculty of Science, Shinshu University, Matsumoto 390-8621, Japan b Laboratory of Genetics, Wageningen Agricultural University, Dreijenlaan 2, 6703 HA Wageningen, The Netherlands c Department of Molecular Biology, DLO-Centre for Plant Breeding and Reproduction Rese...

We present a novel haptic rendering technique. Building on previous work, we propose a haptic model based on a volumetric description of the geometry of an object. Unlike previous volumetric approaches, we also find a virtual contact point on the surface in order to derive a penalty force that is consistent with the real geometry of the object, without introducing force discontinuity. We also d...

I n extracting a polynomial surface patch nearan intensity or range discontinuity, a robust estimator must tolerate not only the truly random bad data (“random outliers”), but also the coherently structured points ((bseudo outliers”) that belong to a different surface. To characterize the performance of least median of squares, M-estimators, Hough transforms, RANSAC, and MINPRAN on data contain...

In the present work an application of fuzzy logic for leather surface defects identification is investigated. The defects create a discontinuity at the surface which leads to regions with different intensities than the background. Binary images are obtained after the segmentation. They contain non-defective (regular texture) and defective structural elements. The objective is to classify the el...

We demonstrate image processing algorithms that achieve the distortion-corrected projection on surfaces with horizontal discontinuity, with casually placed camera and projector. We focus on three cases of perspective-corrected projection: single projection on flat surface, single projection on wall corner, multiple projections on flat surface. Image pre-warping is used to achieve screen geometr...

Three-dimensional shape reconstruction of objects in water by observing from outside requires a geometrical analysis which takes the refraction effect into account. In the analysis, it is indispensable to know the shape of a vessel whose surface has discontinuity of the refractive index. This paper proposes a method for three-dimensional measurement which determines the vessel shape at first an...