We present a stereo active vision system which performs tracking tasks on smoothly moving objects in complex backgrounds. Dynamic control of the camera vergence adapt the horopter geometry to the target position and allows to pick it up easily on the basis of stereoscopic disparity features. We introduce a novel vergence control strategy based on the computation of \virtual horopters" to track ...

The potential capabilities and limitations of single ball lenses for coupling laser diode radiation to single-mode optical bers have been analyzed; parameters important to optical ber communications were specically considered. These parameters included coupling eciency, eective numerical apertures , lens radius, lens refractive index, wavelength, magnication in imaging the laser diode on the be...

Interval estimation for the proportion parameter in one-sample misclassied binary data has caught much interest literature. Re- cently, an approximate Bayesian approach been proposed. This ap- proach is simpler to implement and performs better than existing frequen- tist approaches. However, because a normal approximation marginal posterior density was used this approach, some eciency may be lo...

by reducing the back-projection in the root process by the relative time of ltering and backprojection, an utilization of 81.8% was achieved. Symmetric Multiprocessor Computations were done on a DEC AlphaServer 2000 4/233. This machine is an SMP with 2 processors , and 256 MB of RAM. The parallel implementation with complete load balancing was used. The serial version ran in 684.2 seconds and t...

Parallelism can be exploited to handle the enormous computational requirements of many vision applications. However, the computational power oered by multiprocessor architectures cannot be fully harnessed to achieve the desired speedup. This is primarily due to the unbalanced distribution of computational load among the processors of a parallel architecture. Furthermore, in parallel implementat...

Parallelism can be exploited to handle the enormous computational requirements of many vision applications. However, the computational power oered by multiprocessor architectures cannot be fully harnessed to achieve the desired speedup. This is primarily due to the unbalanced distribution of computational load among the processors of a parallel architecture. Furthermore, in parallel implementat...

The security and eciency of two recently proposed block ciphers, bear and lion, both based on a hash function and a stream cipher, is discussed. Meet-in-the-middle attacks are presented which can be used to dramatically reduce the complexity of a brute-force key search on both these ciphers. A new block cipher is described which is not susceptible to meet-in-the-middle attacks, is provably secu...

This study demonstrates the ecacy of neural implementations of multistage and tree-search quantization. For xed branching ratio we have seen that the tree-search quantizer consistently outperforms the multi-stage structure, though at considerable resource cost. For networks with equal neural resource, the multistage architecture returns signicantly lower mse than the at and tree-search architec...

This paper uses a DEA model of multi-unit eciency measurement to investigate the gains from regional analysis of ecient economic development. The model is applied to the Chinese city economic development data used by Charnes, Cooper, and Li in a recent issue of this journal to demonstrate the usefulness of alternative DEA-based measures in economic development policy. Assuming that Chinese ci...

The conventional de nition of e ciency of a parallel program is based on the assumption that nodes are homogeneous and exclusively available for the tasks of the program. In this paper we present a more general de nition of e ciency, omitting the assumptions of homogeneity and exclusivity. This de nition can be applied to parallel programs e.g. in multi-user environments or to isolated parts of...