Visual information is difficult to search and interpret when the density of the displayed information is high or the layout chaotic. Visual information that exhibits such properties is generally referred to as being ‘cluttered’. Clutter should be avoided in information visualizations and interface design in general because it can severely degrade task performance. Although previous studies have...

Nowadays, through wall imaging (TWI) is an emerging topic of research in which one of the most important tasks is to minimize the clutter through which detection accuracy can be improved. Clutter in TWI is due to many reasons like wall coupling, antenna coupling, multiple reflections etc. To analyze the clutter reduction techniques, firstly we indigenously assembled a TWI system (i.e., step fre...

Space-time adaptive processing (STAP) is an important airborne radar technique used to improve target detection in clutter-limited environments. Effective STAP implementation is dependent on accurate space-time covariance matrix estimation. Heterogeneous clutter, including spiky, spatial clutter variation, violates underlying STAP training assumptions and can significantly degrade corresponding...

PURPOSE To correlate speech rate and speech disruptions in individuals who clutter, and to compare with individuals who do not clutter. METHODS Participants were 14 individuals with ages between 8 and 40 years and 11 months, of both genders, divided into two groups paired by age and gender. GI was composed by seven individuals who clutter, and GII by seven individuals who do not clutter. The ...

This paper mainly investigates the bispectrum property of sea clutter. For non-Gaussian sea clutter, bispectrum can reveal its property from higher-order probability structures, which is complementary to current second-order theory based research. Bispectrum estimation of sea clutter is accomplished by using the FFT-based method with a frequency-domain Rao-Gabr window. Analysis results show tha...

Modeling sea clutter by chaotic dynamics has been an exciting yet heatedly debated topic. To resolve controversies associated with this approach, we use the scale-dependent Lyapunov exponent (SDLE) to study sea clutter. The SDLE has been shown to be able to unambiguously distinguish chaos from noise. Our analyses of almost 400 sea clutter datasets measured by Professor Simon Haykin suggest that...

The long term goal of this research is to develop a general method to determine the dynam­ ics of clutter observed in sonar imagery such as Ocean Acoustic Waveguide Remote Sensing (OAWRS). We aim to use waveguide remote sensing techniques to obtain time varying density images of clutter in a shallow water environment, and use these images to develop a robust technique to invert for clutter dyna...

This study investigates the effects of frequency of exposure to banner ads and ad clutter in web pages upon online users’ psychological responses. In a 7 (frequency 1 through 7) x 2 (clutter vs. non-clutter) between-participants factorial experiment, participants (N = 250) were randomly assigned to one of fourteen news websites, each with 20 separate pages of news stories and animated banner ad...

Visual clutter concerns designers of user interfaces and information visualizations. This should not surprise visual perception researchers because excess and/or disorganized display items can cause crowding, masking, decreased recognition performance due to occlusion, greater difficulty at both segmenting a scene and performing visual search, and so on. Given a reliable measure of the visual c...

Previous studies have proposed image-based clutter measures that correlate with human search times and/or eye movements. However, most models do not take into account the fact that the effects of clutter interact with the foveated nature of the human visual system: visual clutter further from the fovea has an increasing detrimental influence on perception. Here, we introduce a new foveated clut...