Results 11 to 20 of about 1,655,803 (293)

An Improved Top-Hat Filter with Sloped Brim for Extracting Ground Points from Airborne Lidar Point Clouds

open access: yesRemote Sensing, 2014
Airborne light detection and ranging (lidar) has become a powerful support for acquiring geospatial data in numerous geospatial applications and analyses.
Yong Li   +4 more
doaj   +1 more source

Compute Less to Get More: Using ORC to Improve Sparse Filtering [PDF]

open access: yes, 2015
Sparse Filtering is a popular feature learning algorithm for image classification pipelines. In this paper, we connect the performance of Sparse Filtering with spectral properties of the corresponding feature matrices.
Guadarrama, Sergio, Lederer, Johannes
core   +1 more source

Large-scale wave-front reconstruction for adaptive optics systems by use of a recursive filtering algorithm [PDF]

open access: yes, 2005
We propose a new recursive filtering algorithm for wave-front reconstruction in a large-scale adaptive optics system. An embedding step is used in this recursive filtering algorithm to permit fast methods to be used for wave-front reconstruction on an ...
Britton, Matthew   +2 more
core   +1 more source

Estimating Leaf Bulk Density Distribution in a Tree Canopy Using Terrestrial LiDAR and a Straightforward Calibration Procedure

open access: yesRemote Sensing, 2015
Leaf biomass distribution is a key factor for modeling energy and carbon fluxes in forest canopies and for assessing fire behavior. We propose a new method to estimate 3D leaf bulk density distribution, based on a calibration of indices derived from T ...
François Pimont   +4 more
doaj   +1 more source

IR detection module with integrated real-time FIR filter implemented in FPGA [PDF]

open access: yesInternational Journal of Electronics and Telecommunications
Infrared detectors are usually characterized by 1/f noise when operating with biasing. This type of noise significantly reduces detection capabilities for low-level and slow signals.
Krzysztof Achtenberg   +2 more
doaj   +3 more sources

The Hitchhiker's Guide to Nonlinear Filtering [PDF]

open access: yes, 2019
Nonlinear filtering is the problem of online estimation of a dynamic hidden variable from incoming data and has vast applications in different fields, ranging from engineering, machine learning, economic science and natural sciences.
Kutschireiter, Anna   +2 more
core   +2 more sources

Symmetries of differential equations in computer vision applications [PDF]

open access: yesКомпьютерные исследования и моделирование, 2010
In our work we present generalization of well-known approach for construction of invariant feature vectors of images in computer vision applications. Basic feature of the suggested algorithm is replacement of commonly used Gaussian filter by convolution ...
Denis Aleksandrovich Vrazhnov   +2 more
doaj   +1 more source

Adaptive conflict-free optimization of rule sets for network security packet filtering devices [PDF]

open access: yes, 2015
Packet filtering and processing rules management in firewalls and security gateways has become commonplace in increasingly complex networks. On one side there is a need to maintain the logic of high level policies, which requires administrators to ...
Annachiara Mingo   +3 more
core   +3 more sources

Spatial Filtering Pipeline Evaluation of Cortically Coupled Computer Vision System for Rapid Serial Visual Presentation [PDF]

open access: yes, 2018
Rapid Serial Visual Presentation (RSVP) is a paradigm that supports the application of cortically coupled computer vision to rapid image search. In RSVP, images are presented to participants in a rapid serial sequence which can evoke Event-related ...
Healy, Graham   +3 more
core   +2 more sources

Locus filters

open access: yesOptics Express, 2022
In this paper, directly following from Gage [J. Opt. Soc. Am.23,46(1993)10.1364/JOSA.23.000046], we study the design of a particular theoretical filter for photography, that we call the locus filter. It is built in such a way that a Wien-Planckian light (of any temperature) is spectrally mapped to another Wien-Planckian light.
Rada Deeb, Graham Finlayson
openaire   +4 more sources

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