نتایج جستجو برای: optical flow and neighborhood gray

تعداد نتایج: 16985284  

1987
JOSEPH K. KEARNEY DANIEL L. BOLEY

Multiple views of a scene can provide important information about the structure and dynamic behavior of three-dimensional objects. Many of the methods that recover this information require the determination of optical flow-the velocity, on the image, of visible points on object surfaces. An important class of techniques for estimating optical flow depend on the relationship between the gradient...

Journal: :Physical review 2021

We investigate quantum entanglement in an analog black hole realized the flow of a Bose-Einstein condensate. The system is described by three-mode Gaussian state and we construct corresponding covariance matrix at zero finite temperature. study associated bipartite tripartite measures discuss their experimental observation. identify simple optical setup equivalent to which suggests different wa...

2003
David Edwards Johnny T. Chang Lin Shi Yizhou Yu

This paper presents a novel approach for estimating the flow fields of dynamic temporal textures whose motion differs radically from that of rigid bodies. Our approach is based on a local flow probability distribution function at each pixel using the STAR model and the data from a spatio-temporal neighborhood. The peak of this density function can be regarded as the estimated local flow vector....

2007
Zao Xu Xiao-Ming Xu David Kleinfeld Patrick D. Lyden

We discuss two complementary methods for the study of cerebral blood flow and brain function in response to the occlusion of individual, targeted blood vessels. These bear on the study of microstroke and vascular dysfunction in cortex. One method makes use of linear optical absorption by a photosensitizer, transiently circulated in the blood stream, to induce an occlusion in a surface or near-s...

2008
Luciano Spinello Roland Siegwart

This paper presents a novel technique to generate regions of interest in image sequences containing independent motions. The technique uses a novel motion segmentation method to segment optical flow using a local entropies field. Local entropy values are computed for each optical flow vector and are collected as input for a two state Markov Random Field that is used to discriminate the motion b...

This article concentrates on the effect of MHD heat mass transfer on the stagnation point nanofluid flow over a stretching or shrinking sheet with homogeneous-heterogeneous reactions. The flow analysis is disclosed in the neighborhood of stagnation point. Features of heat transport are characterized with Newtonian heating. The homogeneous-heterogeneous chemical reaction between the fluid and di...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی شیمی 1391

attempts have been made to study the thermodynamic behavior of 1,3 butadiene purification columns with the aim of retrofitting those columns to more energy efficient separation schemes. 1,3 butadiene is purified in two columns in series through being separated from methyl acetylene and 1,2 butadiene in the first and second column respectively. comparisons have been made among different therm...

2007
Vania V. Estrela Manoel Caldeira Fernanda D. S. Alves

This paper presents an approach where the optical flow between frames of video sequences is estimated according to a pel-recursive strategy through the use of a principal component regression (PCR). This is a simple choice when it comes to treat mixtures of motion vectors due to the fact that it is not essential to have too much knowledge on their statistical properties (although they are suppo...

2011
Md. Motiur Rahman Mohammad Abu Naim Uddin Abdul Aziz A.S.M Delowar Hossain Md. Ziaul Haque

These papers propose a novel method for noise removal in the images. The impulsive noise takes gray level values from the image as minimum or maximum from the dynamic gray level range. In this paper Set notations are proposed to eliminate the noise pixels corrupted by low and high gray level values. The method also adopt median and is compared with obtained Set notation values from local neighb...

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