The problem of estimating feature orientation from noisy image data is addressed using a multiresolution technique. It is shown that by an appropriate choice of representation of orientation, it is possible to employ simple linear smoothing methods to reduce estimation noise. The smoothing is done using a combination of scale-space recursive filtering and iterative estimation, giving significan...

in order to understand the impact of layer-wise scanning direction in the selective laser sintering process, test coupons were manufactured for mechanical testing from duraform™ polyamide powder. the effects of laser energy density, varying between 0.003 and 0.024 j/mm 2 were examined in test specimens rotated 90º through the z axis. sls machines do not always facilitate ‘cross-hatching’ of lay...

This paper describes our experiences with applying dynamic analysis solutions with the help of Aspect Orientation (AO) on an industrial legacy application written in C. The purpose of this position paper is two-fold: (1) we want to show that the use of Aspect Orientation to perform dynamic analysis is particularly suited for legacy environments and (2) we want to share our experiences concernin...

We demonstrate the measurement of field-free molecular alignment of nitrogen by a cross-(de)focusing assisted polarization spectroscopy technique, allowing us to distinguish the transient orientation of prealigned molecules on the basis of the relative ratio of the adjacent revival peaks of the measured signal. For impulsive excitation with high pump intensities, the involved orientation-depend...

Control of liquid crystal (LC) orientation using a proper SiO2 alignment layer is essential for the optimization of vertically aligned nematic (VAN) displays. With this aim, we studied the optical anisotropy of thin SiO2 films by generalized ellipsometry as a function of deposition angle. The columnar SiO2 structure orientation measured by a noninvasive ellipsometry technique is reported for th...

Aspect-orientation has been capturing researcher’s attention for the last few years. We have seen the birth of several aspect-oriented programming techniques and also the propagation of the aspect concept to the earlier stages of the software development process, such as requirements analysis and design. Our long-term goal is to extend aspect-orientation to the business modelling activity. This...

This paper features an efficient method of performing the shape analysis of objects in a binary image using a technique called as the moments. Using these moments, we can compute the centroid, moment of inertia, principal angle, orientation of the captured objects in the image. The simulation results show the effectiveness of the developed method. Index Terms — Moments, Invariance, Centroid, Mo...

We present a new method for the imaging of single metallic nanoparticles that provides information about their shape and orientation. Using confocal microscopy in combination with higher order laser modes, scattering images of individual particles are recorded. Gold nanospheres and nonorods render characteristic patterns reflecting the different particle geometries. In the case of nanorods, the...

A technique to quantify the uncertainty in an estimated orientation distribution function (ODF) by propagating the uncertainty from measured pole figures is demonstrated in this paper using Monte Carlo techniques and the Matlab toolbox for quantitative texture analysis. Unlike the uncertainty in the measured pole figures, where small values of intensity correlate to high uncertainty, uncertaint...

Amyloid fibrils are proteins misfolding structures that involve a beta-sheet structure and are associated with the pathologies of various neurodegenerative diseases. We show that Thioflavine-T and Congo Red, two major dyes used to image fibrils by fluorescence assays, can provide deep structural information when probed by means of polarization resolved fluorescence microscopy [1]. This techniqu...