This paper describes three new results for volume rendering algorithms utilizing splatting. First, an antialiasing extension to the basic splatting algorithm is introduced that mitigates the spatial aliasing for high-resolution volumes. Aliasing can be severe for high-resolution volumes or volumes where a high depth of field leads to converging samples along the perspective axis. Next, an analy...

We propose the Cross Scanline Buffer which preserves the result of hidden surface removal as performed by the Cross Scanline Algorithm. The Cross Scan Buffer reduces image re-generation time and eliminates aliasing artifacts even if the image is arbitrarily scaled. Perfect anti-aliasing is achieved because the Cross Scanline Algorithm analytically determines visible polygonal surfaces and divid...

An anti-aliasing formula is derived for interferometric redatuming of seismic data. More generally, this formula is valid for numerical implementation of the reciprocity equations of correlation type, which is used for redatuming, extrapolation, interpolation, and migration. The anti-aliasing condition can be, surprisingly, more tolerant of a coarser trace sampling compared to the standard anti...

Foremost among the promising imaging performance characteristics of cone-beam CT using flat-panel imagers is the ability to form volumetric images with soft-tissue contrast visibility in combination with sub-millimeter 3-D spatial resolution. Each of these two essential characteristics is intimately related to the spatial-frequency-dependent signal and noise transfer characteristics of the imag...

Fourier-based minimum weighted norm interpolation (MWNI) has been widely used to regularize land seismic data. It is relatively computationally fast, and easily extends to higher dimensions. However, it has difficulty to interpolate regularly missing data that are spatially aliased. Minimizing the aliasing artifacts is still a technical challenge in MWNI. I propose a new and novel method to add...

Speech source localization (SSL) using a microphone array aims to estimate the direction-of-arrival (DOA) of the speech source. However, its performance often degrades rapidly in reverberant environments. In this paper, a novel dual-microphone SSL algorithm is proposed to address this problem. First, the time-frequency regions dominated by direct sound are extracted by tracking the envelopes of...

Due to the lack of enough generalization in the statespace, common methods in Reinforcement Learning (RL) suffer from slow learning speed especially in the early learning trials. This paper introduces a model-based method in discrete statespaces for increasing the learning speed in terms of required experience (but not required computational time) by exploiting generalization in the experiences...

Morphological antialiasing is a post-processing approach which does note require additional samples computation. This algorithm acts as a non-linear filter, ill-suited to massively parallel hardware architectures. We redesigned the initial method using multiple passes with, in particular, a new approach to line length computation. We also introduce in the method the notion of topological recons...

1 LO, T.K : 'Miniature aperture-coupled microstrip antenna of very high permittivity', Electron. Lett., 1997, 33, pp. 9-10 2 PINHAS, s., and SHTRIKMAN, s.: 'Comparison between computed and measured bandwidth of quarter-wave microstrip radiators', IEEE Trans., 1988, AP-36, (ll), pp. 1615-1616 3 WATERHOUSE, R.B : 'Small microstrip patch antenna', Electron. Lett., 1995, 31, pp. 604605 4 LUK. K.M.,...

A new approach to improve image quality in partially parallel 3D MRI is presented. Aliasing artifacts are manipulated by modifications of the gradient tables in the 3D phase encoding direction in order to achieve improved conditions for the final image reconstruction procedure. In contrast to conventional 3D parallel imaging methods, like 2D SENSE [1], superimposed partitions with essentially i...