نتایج جستجو برای: target shape

تعداد نتایج: 581381  

Journal: :ISPRS Int. J. Geo-Information 2017
Fangzheng Dou Wenhui Diao Xian Sun Yue Zhang Kun Fu

Contour shapes are important features. An accurate contour shape of a target can provide important prior information for applications, such as target recognition, which can improve the accuracy of target interpretation. In this paper, a synthetic aperture radar (SAR) target reconstruction method is proposed, which can be used to reconstruct the target by using shape priors to perform an accurat...

Journal: :Frontiers in Marine Science 2021

Antarctic krill are subject to precautionary catch limits, based on biomass estimates, ensure human activities do not adversely impact their important ecological role. Accurate target strength models of individual underpin estimates. These scaled using measured and estimated distributions length orientation. However, while the distribution a swarm is accessible from net samples, there currently...

Journal: :Computer-Aided Design 2010
Thomas R. Langerak

Form feature modeling is a much used shape modeling technique that offers high-level control over a shape. When a feature-based interpretation of shape data is not available, e.g. when a shape is obtained by a laser range scanner or from a database of shapes, then the features must be reconstructed through feature recognition. Many methods for the recognition of machining features exist, but th...

2010
Yuji Matsuki Takuya Sakamoto Toru Sato

Developing a cost-effective security system has been an important issue in crime prevention. Although cameras have been known as an effective candidate for this purpose, they have some downside, such as difficulty in accurately estimating the three-dimensional shape of a target, and the exact distance to a target [1], [2]. Ultra-wideband (UWB) pulse radar is an alternative for resolving these p...

2013
Peter J. Lenkic James T. Enns

Some previous studies have reported that the visibility of a target in the path of an apparent motion sequence is impaired; other studies have reported that it is facilitated. Here we test whether the relation of shape similarity between the inducing and target stimuli has an influence on visibility. Reasoning from a theoretical framework in which there are both predictive and postdictive influ...

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