scholarly journals Solar System Object Image Search: A precovery search engine

2015 ◽  
Vol 10 (S318) ◽  
pp. 270-273
Author(s):  
Stephen D. J. Gwyn ◽  
Norman Hill ◽  
JJ Kavelaars
Keyword(s):  
Solar System ◽  
Moving Objects ◽  
Object Image ◽  
Image Search ◽  
Moving Targets ◽  
Orbital Elements ◽  
Data Centre ◽  
Astronomical Image ◽  
Solar System Object ◽  
The Web

AbstractWhile regular astronomical image archive searches can find images at a fixed location, they cannot find images of moving targets such as asteroids or comets. The Solar System Object Image Search (SSOIS) at the Canadian Astronomy Data Centre allows users to search for images of moving objects, allowing precoveries. SSOIS accepts as input either an object designation, a list of observations, a set of orbital elements, or a user-generated ephemeris for an object. It then searches for observations of that object over a range of dates. The user is then presented with a list of images containing that object from a variety of archives. Initially created to search the CFHT MegaCam archive, SSOIS has been extended to other telescopes including Gemini, Subaru/SuprimeCam, WISE, HST, the SDSS, AAT, the ING telescopes, the ESO telescopes, and the NOAO telescopes (KPNO/CTIO/WIYN), for a total of 24.5 million images. As the Pan-STARRS and Hyper Suprime-Cam archives become available, they will be incorporated as well. The SSOIS tool is located on the web at http://www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/en/ssois/.

Gaia spectroscopic view of the asteroid main belt and beyond

2021 ◽  
Author(s):  
Marco Delbo ◽  
Laurent Galluccio ◽  
Francesca De Angeli ◽  
Paolo Tanga ◽  
Alberto Cellino ◽  
...  
Keyword(s):  
Solar System ◽  
Preliminary Investigation ◽  
Planetary Science ◽  
Reflectance Spectra ◽  
Physical Parameters ◽  
The Novel ◽  
Main Belt ◽  
Compositional Gradient ◽  
Solar System Object ◽  
Science Community

<div class="">Asteroids reflectance spectra in the visible light will be one of the novel products of the Gaia Data Release 3 (DR3). These spectra are produced from Gaia observations obtained by means of the blue and red photometers — the so-called BP and RP, respectively. We will review the strategy adopted to produce asteroid reflectance spectra from BP-RP data, focusing on the choice of spectro-photometric calibrations computed taking into account solar system object astrometry and suitable lists of solar-analog stars.</div> <div class=""> </div> <div class="">Our preliminary investigation shows that we will be able to obtain reflectance spectra for asteroids as small as some km in the main belt, by exploiting the fact that each object has been observed multiple times by Gaia. We will show the capability of Gaia to probe the detailed compositional gradient of the main belt down to small sizes and to study correlations between spectral classes and other asteroid physical parameters, such as albedo and size.</div> <div class=""> </div> <div class="">Concerning the brightest asteroids, we expect to have substantial signal at wavelengths shorter than 450 nm, allowing Gaia to examine this region of the spectrum that has been poorly investigated by ground-based asteroid spectroscopic surveys. This region is characterised by the presence of a reflectance downturn that is diagnostic for the composition of classes of primitive asteroids, for instance those including the parent bodies of carbonaceous chondrites. These asteroids may have played an important role for the delivery of prebiotic compounds to Earth during the early phases of solar system' s history and, as such, are at the center of attention of the planetary science community. </div>

scholarly journals A Feature-Based Forensic Procedure for Splicing Forgeries Detection

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Irene Amerini ◽  
Rudy Becarelli ◽  
Roberto Caldelli ◽  
Matteo Casini
Keyword(s):  
Image Forensics ◽  
Experimental Results ◽  
Real Case ◽  
The Internet ◽  
Image Search ◽  
Feature Based ◽  
Feature Match ◽  
The Web

Nowadays, determining if an image appeared somewhere on the web or in a magazine or is authentic or not has become crucial. Image forensics methods based on features have demonstrated so far to be very effective in detecting forgeries in which a portion of an image is cloned somewhere else onto the same image. Anyway such techniques cannot be adopted to deal with splicing attack, that is, when the image portion comes from another picture that then, usually, is not available anymore for an operation of feature match. In this paper, a procedure in which these techniques could also be employed will be shown to get rid of splicing attack by resorting to the use of some repositories of images available on the Internet like Google Images or TinEye Reverse Image Search. Experimental results are presented on some real case images retrieved on the Internet to demonstrate the capacity of the proposed procedure.

Simultaneous visible and near-infrared time resolved observations of the outer Solar System object (29981) 1999 TD10

Icarus ◽  
2004 ◽  
Vol 171 (2) ◽  
pp. 506-515 ◽  
Author(s):  
Béatrice E.A. Mueller ◽  
Carl W. Hergenrother ◽  
Nalin H. Samarasinha ◽  
Humberto Campins ◽  
Donald W. McCarthy
Keyword(s):  
Solar System ◽  
Near Infrared ◽  
Outer Solar System ◽  
Time Resolved ◽  
Solar System Object

Deep Multiple Instance Hashing for Fast Multi-Object Image Search

2021 ◽  
Vol 30 ◽  
pp. 7995-8007
Author(s):  
Wanqing Zhao ◽  
Ziyu Guan ◽  
Hangzai Luo ◽  
Jinye Peng ◽  
Jianping Fan
Keyword(s):  
Object Image ◽  
Image Search

scholarly journals Supportive Evidence for a Brown Dwarf Solar Companion

2004 ◽  
Vol 202 ◽  
pp. 214-216
Author(s):  
John J. Matese
Keyword(s):  
Solar System ◽  
Oort Cloud ◽  
Evidence Based ◽  
Supportive Evidence ◽  
Orbital Elements ◽  
Brown Dwarf ◽  
Wide Binary ◽  
Gas Giant ◽  
Binary Object

We have previously given evidence based on Oort cloud comet orbital elements which suggested that there may be a Jovian-mass brown dwarf in our solar system. An extended cometary database is now available. The analyses have been repeated and we find that the set of statistically significant correlated anomalies is enhanced. We also respond to unsupported objections that have been raised to this conjecture. If real, the wide-binary object would constitute a natural dynamical intermediary between gas giant planetary objects and isolated objects.

scholarly journals A Phlegm Stagnation Monitoring Based on VDS Algorithm

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Zhiguo Gao ◽  
Xin Yu
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Moving Objects ◽  
Recognition Rate ◽  
Differential Method ◽  
Video Frame ◽  
Moving Targets ◽  
System A ◽  
Video Images ◽  
Svm Algorithm

In the nonmedical sputum monitoring system, a practical solution for phlegm stagnation care of patients was proposed. Through the camera, the video images of patients’ laryngeal area were obtained in real time. After processing and analysis on these video frame images, the throat movement area was found out. A three-frame differential method was used to detect the throat moving targets. Anomalies were identified according to the information of moving targets and the proposed algorithm. Warning on the abnormal situation can help nursing personnel to deal with sputum blocking problem more effectively. To monitor the patients’ situation in real time, this paper proposed a VDS algorithm, which extracted the speed characteristics of moving objects and combined with the DTW algorithm and SVM algorithm for sequence image classification. Phlegm stagnation symptoms of patients were identified timely for further medical care. In order to evaluate the effectiveness, our method was compared with the DTW, SVM, CTM, and HMM methods. The experimental results showed that this method had a higher recognition rate and was more practical in a nonmedical monitoring system.

Multimedia Proxy Cache Architectures

2011 ◽  
pp. 731-736
Author(s):  
Mouna Kacimi ◽  
Richard Chbeir ◽  
Kokou Yetongnon
Keyword(s):  
System Design ◽  
Moving Objects ◽  
Timing Constraints ◽  
Proxy Caching ◽  
Proxy Cache ◽  
The Real ◽  
Disk Space ◽  
Network Load ◽  
Indexing And Retrieval ◽  
The Web

The Web has become a significant source of various types of data, which require large volumes of disk space and new indexing and retrieval methods. To reduce network load and improve user response delays, various traditional proxy-caching schemes have been proposed (Abonamah, Al-Rawi, & Minhaz, 2003; Armon & Levy, 2003; Chankhunthod, Danzig, Neerdaels, Schwartz, & Worrell, 1996; Chu, Rao, & Zhang, 2000; Fan, Cao, Almeida, & Broder, 2000; Francis, Jamin, Jin, Jin, Raz, Shavitt, & Zhang, 2001; Paul & Fei, 2001; Povey & Harrison, 1997; Squid Web Proxy Cache, 2004; Wang, Sen, Adler, & Towsley, 2002). A proxy is a server that sits between the client and the real server. It intercepts all queries sent to the real server to see if it can fulfill them itself. If not, it forwards the query to the real server. A cache is a disk space used to store the documents loaded from the server for future use. A proxy cache is a proxy having a cache. The characteristics of traditional caching techniques are threefold. First, they regard each cached object as having no dividable data, which must be recovered and stored in their entirety. As multimedia objects like videos are usually too large to be cached in their entirety, the traditional caching architectures cannot be efficient for this kind of object. Second, they do not take into account the data size to manage the space storage. Third, they do not consider in their caching-system design the timing constraints that need moving objects.

scholarly journals Refocusing of Multiple Moving Targets Based on the Joint Sparse Processing of One Channel Synthetic Aperture Radar Imagery Patches

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1215 ◽  
Author(s):  
Xin Wang ◽  
Ling Qiao
Keyword(s):  
Synthetic Aperture Radar ◽  
Moving Objects ◽  
Radar Data ◽  
Synthetic Aperture ◽  
Moving Targets ◽  
Lp Norm ◽  
Radar Imagery ◽  
Sar Imagery ◽  
Norm Constraint ◽  
Aperture Radar

A sparse-based refocusing methodology for multiple slow-moving targets (MTs) located inside strong clutter regions is proposed in this paper. The defocused regions of MTs in synthetic aperture radar (SAR) imagery were utilized here instead of the whole original radar data. A joint radar projection operator for the static and moving objects was formulated and employed to construct an optimization problem. The Lp norm constraint was utilized to promote the separation of MT data and the suppression of clutter. After the joint sparse imaging processing, the energy of strong static targets could be suppressed significantly in the reconstructed MT imagery. The static scene imagery could be derived simultaneously without the defocused MT. Finally, numerical simulations were used verify the validity and robustness of the proposed methodology.

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