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High-dimensional descriptor indexing for large multimedia databases

Eduardo Valle, Matthieu Cord, Sylvie Philipp-Foliguet
2008 Proceeding of the 17th ACM conference on Information and knowledge mining - CIKM '08  
This technique, based on the simultaneous use of moderate-dimensional space-filling curves, has as main advantages the ability to handle high-dimensional data (100 dimensions and over), to allow the easy  ...  We also test multicurves on the real-world application of image identification for cultural institutions.  ...  The space is filled by the curve to which the series converges. A curve of a given finite order is said to be an approximation of the named space-filling curve.  ... 
doi:10.1145/1458082.1458181 dblp:conf/cikm/ValleCP08 fatcat:7yontmz6tzdivi22qaxoylcrqi

Indexing personal image collections: a flexible, scalable solution

Eduardo Valle, Matthieu Cord, Sylvie Philipp-Foliguet, David Gorisse
2010 IEEE transactions on consumer electronics  
The index is based on the simultaneous use of several moderatedimensional space-filling curves.  ...  She has developed a fuzzy segmentation method, methods for inexact graph matching and statistical learning, and worked on applications concerning indexing and retrieval of images, videos and 3D objects  ...  Indexing using Space-Filling Curves Space-filling curves are fractal curves whose Hausdorff dimension is to that of the dimension in which they are embedded.  ... 
doi:10.1109/tce.2010.5606242 fatcat:mpwir7pa3bd25arjavg7rwvmce

An image compression method for spatial search

R. Pajarola, P. Widmayer
2000 IEEE Transactions on Image Processing  
Index Terms-Lossless image compression, space filling curves, spatial indexing and retrieval.  ...  For reasons of storage space, images in a collection, such as satellite pictures in geographic information systems, are maintained in compressed form.  ...  Seidel, National Point of Contact (NPOC), Swiss Federal Office of Topography for providing us the digital satellite images used to perform the experimental tests.  ... 
doi:10.1109/83.826774 pmid:18255408 fatcat:gl5exegorzfqngisztktguvz2u

An image processing technique for automatically detecting forest fire

Jerome Vicente, Philippe Guillemant
2002 International journal of thermal sciences  
The first part describes the segmentation technique we use to extract persistent dynamical envelopes of pixels into the images.  ...  In this paper we present an automatic system for early smoke source detection through the real time processing of landscape images.  ...  To index each embedded point we use its curvilinear coordinates on the space-filling curve. We call the index the fractal rank.  ... 
doi:10.1016/s1290-0729(02)01397-2 fatcat:bbgfgwr2cngkfgfaul3runspku

Writing sequences on the plane

E. Soijanin
2002 IEEE Transactions on Information Theory  
We look into three unusual ways to write a sequence in the plane: by Penrose tilings, by space-filling curves, and by cylindrical and spiral lattices.  ...  We show how Penrose tilings can be used to record information and how some spiral lattices can be used for quantization of color spaces.  ...  Wyner who taught her what a great fortune it is to be able to do for a living what you would do for fun.  ... 
doi:10.1109/tit.2002.1003825 fatcat:p6esifk37ra5dkayzoknafykte

Four-dimensional visualization of subpleural alveolar dynamics in vivo during uninterrupted mechanical ventilation of living swine

Eman Namati, William C. Warger, Carolin I. Unglert, Jocelyn E. Eckert, Jeroen Hostens, Brett E. Bouma, Guillermo J. Tearney
2013 Biomedical Optics Express  
Pulmonary alveoli have been studied for many years, yet no unifying hypothesis exists for their dynamic mechanics during respiration due to their miniature size (100-300 μm dimater in humans) and constant  ...  Here we report a new platform to image the first layer of air-filled subpleural alveoli through the use of a lightweight optical frequency domain imaging (OFDI) probe that can be placed upon the pleura  ...  Acknowledgments The authors thank Luis Guerrero for his help with the surgical procedures, Elk Halpern for his help with the statistical analysis, and Alex Chee, Lida Hariri, and Melissa Suter for  ... 
doi:10.1364/boe.4.002492 pmid:24298409 pmcid:PMC3829543 fatcat:u3oxujmsrrcknpgodxvity5phi

Modeling growth curve of fractal dimension of urban form of Beijing

Yanguang Chen, Linshan Huang
2019 Physica A: Statistical Mechanics and its Applications  
In this paper, the experimental method is employed to find parametric models for the growth curves of fractal dimension of Chinese urban form.  ...  The models are also suitable for many cities in the north of China.  ...  The process of urban growth is a nonlinear dynamic process of urban space filling and replacement.  ... 
doi:10.1016/j.physa.2019.04.165 fatcat:ccog2g2zhvg7dejbexxiur7bbu

Effective Image Retrieval Supporting Complex Similarity Queries [chapter]

G.-H. Cha, C.-W. Chung
1998 Visual Database Systems 4 (VDB4)  
In the system, three types of indexes exist: visual indexes for visual information such as color and texture, semantic indexes for non-quantifiable abstract information, and keyword indexes for more abstract  ...  The indexing scheme and evaluation strategies for complex similarity queries are elaborated.  ...  A space-filling curve is a mapping that maps the unit interval onto the n-dimensional unit hyper-cube continuously.  ... 
doi:10.1007/978-0-387-35372-2_22 fatcat:4l5ouw2ho5e3phhpwut6rdmlzy

A computational approach to compare microvessel distributions in tumors following antiangiogenic treatments

Marco Righi, Arianna Giacomini, Cristiana Lavazza, Daniela Sia, Carmelo Carlo-Stella, Alessandro M Gianni
2009 Laboratory Investigation  
Our approach was based on pixel dilation of digital images of blood vessels and addressed the space-filling property of the vessel layouts.  ...  This was practically achieved computing the number of dilation cycles (Halo index) needed to permeate a pre-defined amount of each image.  ...  ACKNOWLEDGEMENTS We are indebted to E Procacci for technical assistance in slide scanning, to F Clementi for continuous support, and N. Borgese for critical revision of the manuscript.  ... 
doi:10.1038/labinvest.2009.76 pmid:19652644 fatcat:ynzm5nfsgjb6nnvpr3zd3rvwzu

Approximate similarity search for online multimedia services on distributed CPU–GPU platforms

George Teodoro, Eduardo Valle, Nathan Mariano, Ricardo Torres, Wagner Meira, Joel H. Saltz
2013 The VLDB journal  
Similarity search in highdimensional spaces is a pivotal operation for several database applications, including online content-based multimedia services.  ...  In this work, we address these challenges with Hypercurves, a flexible framework for answering approximate k-nearest neighbor (kNN) queries for very large multimedia databases.  ...  Acknowledgements We would like to express our gratitude to the reviewers for their valuable comments, which helped us to improve our work both in terms of content and presentation. E. Valle  ... 
doi:10.1007/s00778-013-0329-7 fatcat:rpcxwmr5hvdwll73wvvnuxirke

Approximate Similarity Search for Online Multimedia Services on Distributed CPU-GPU Platforms [article]

George Teodoro, Eduardo Valle, Nathan Mariano, Ricardo Torres, Wagner Meira Jr, Joel H. Saltz
2012 arXiv   pre-print
Similarity search in high-dimentional spaces is a pivotal operation found a variety of database applications.  ...  In order to address these challenges, we introduce hypercurves, a flexible framework for answering approximate k-nearest neighbor (kNN) queries for very large multimedia databases, aiming at online content-based  ...  When using the space-filling curve map in indexing, we are interested in the pre-images of the query and data points.  ... 
arXiv:1209.0410v1 fatcat:xhcm6doprzeszgofjttuy3dvj4

An Effective Image Encryption Method Based on Space Filling Curve and Plaintext-Related Josephus Traversal

Ying Niu, Xuncai Zhang
2020 IEEE Access  
Therefore, according to the characteristics of the image, we propose a novel space filling curve----Y-index.  ...  SPACE FILLING CURVE A SFC refers to a kind of function curve that includes the whole two-dimensional or even multidimensional space within a one-dimensional curve.  ... 
doi:10.1109/access.2020.3034666 fatcat:yrlmfha4zfexrfodptbgia2feu

FormPad: A Camera-Assisted Digital Notepad [chapter]

Tanveer Syeda-Mahmood, Thomas Zimmerman
2006 Lecture Notes in Computer Science  
The invariants derived from curve and line features reduce the basis search space considerably while still providing for robust localization.  ...  These are needed for accurate association of tablet writing with corresponding entries in the electronic form.  ...  The overall transformation can thus be modeled as a sequence of projections TO CT C C TC P P P P       ' (9) of which, only the transform needs to be computed dynamically per form filling.  ... 
doi:10.1007/11612704_20 fatcat:4wl7ohs5jbgdfdo253wjop233y

Neural Network Analysis of Electroencephalograms Graphical Representation

Aleksandr Bragin, Vladimir Spitsyn
2020 Proceedings of the 30th International Conference on Computer Graphics and Machine Vision (GraphiCon 2020). Part 2  
The paper shows the possibility of using GAF, MTF and Hilbert space-filling curves EEG signal transforms for recognizing motor patterns, which is further applicable, for example, in building a brain-computer  ...  Electroencephalograms are time signals, Gramian Angular Fields (GAF), Markov Transition Field (MTF) and Hilbert space-filling curves transformations are used to represent time series as images.  ...  Binary GAF image is shown in Fig. 1 . Hilbert space-filling curves A Hilbert curve is a continuous fractal space-filling curve.  ... 
doi:10.51130/graphicon-2020-2-4-52 fatcat:fcf2at2axnfs5oj4avuiynvts4

Quantitative Study of Residual Oil Distribution during Water Flooding through Digital Core Analysis

Xuechao Liu, Dazhong Ren, Fengjuan Dong, Junxiang Nan, Ran Zhou, Feng Xiong
2021 Geofluids  
Secondly, analytical and evaluation methods were established to describe fluid distribution in the pore space of the core in different water flooding stages based on curve similarity.  ...  Finally, by numerical results, we analyzed the oil distribution features in the process of water flooding for core samples.  ...  space.  ... 
doi:10.1155/2021/6619440 fatcat:6fnze7myhnathmbn65e7xoao5m
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