We propose in this paper a multiple description coding system by computing projections of information elements. With a complete adequation between projections and packets, we can use it over present erasure channel. Any projection reception contributes in a same way to original information reconstruction. Moreover the system can allocate level of priority for each source layer adding a multi-le...

We study counterparty risk on CDS in a Markov chain model of two reference credits, the firm underlying the CDS and the CDS protection seller. More specifically, we consider a Markov chain copula model in which wrong way risk is represented by the possibility of joint defaults between the counterpart and the firm. In this set-up we derive semi-explicit formulas for most quantities of interest w...

A new BRDF model is presented which can be viewed as an kind of intermediary model between empirism and theory. Main results of physics are observed (energy conservation, reciprocity rule, microfacet theory) and numerous phenomena involved in light reeection are accounted for, in a physically plausible way (incoherent and coherent reeection, spectrum modiications, anisotropy, self-shadowing, mu...

We present an extension of the usual projective geometric framework for computer vision which can nicely take into account an information that was previously not used, i.e. the fact that the pixels in an image correspond to points which lie in front of the camera. This framework, called the oriented projective geometry, retains all the advantages of the unoriented projective geometry, namely it...