Showing posts from 2012

ERBlet transform (on WITS: Where is the starlet)

ERBlet transform dual frame spectrum After about a hundred starlets or wavelets in *let, the newborn ERBlet borrows from the auditory scale, namely the Equivalent Rectangular Bandwidth and the non-stationary Gabor transforms (NSGT). See more at WITS: where is the Starlet . The attendant Matlab toolbox is there (ICASSP 2013). ERBlet In short: A linear and invertible time-frequency transformation adapted to human auditory perception, for masking and perceptual sparsity Etymology: From the ERB scale or E quivalent R ectangular B andwidth filter banks, devised for auditory based-representation, following the philosophy of third-octave filter banks. See also Frequency Analysis and Masking - MIT, Brian C. J. Moore, 1995 and Bark and ERB Bilinear Transforms - Stanford University, by J. O. Smith III Origin: Thibaud Necciari, Design and implementation of the ERBlet transform , FLAME 12 (Frames and Linear Operators for Acoustical Modeling and Parameter Estimation)

Group-pride: IFPEN Ranking

So, i know, it is just another ranking. Well... Press releases : IFP Energies nouvelles makes Thomson Reuters' Top 100 Global Innovators in 2012 05 December 2012 IFP Energies nouvelles (IFPEN) has earned a place in Thomson Reuters' list of Top 100 Global Innovators for the second year running. The ranking, which measures innovation in intellectual property, is determined using a variety of patent-related criteria. This includes application success (the ratio of published applications to granted patents), the volume of patents in innovative areas like new technologies, global coverage (inventions patented with all "quadrilateral" patent authorities, i.e. in Europe, Japan, China and the US) and the patents' impact (the number of times they are cited by competitors). The award is due recognition of IFPEN's policy of innovation and industrial development, aimed at protecting research, promoting technology transfer to industry, and creating wealth and

Beaujolais nouveau: anagrams and Cambridge University research

According to a researcher (hic) at Salonic  University, it doesn't matter in what order the letters in a word are, the only important thing is the quantity of Beaujolais Nouveau wine you have drunk before. This external advertising panel outside a Nicolas shop distills: "Le Beaujolais nouveau est arrivé" in a drunkard anagram: " Le beuajolias nuovaeu est avriré ". See what it does to the poor Alan Parsons Project . The ad takes on the September 2003 hoax on the unimportance of the order of letters, according to a forged  researcher (sic) at Cambridge University ( Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy ). Even if not completely invalid, the hoax may be checked with Switcharoo! ( Order of letters in a word doesn't matter? The hell it ... ). For instance, it kinda works on Wim Sweldens' definition of the wavelet in the introduction for his PhD thesis, Construction and Application of Wavelets in Numerical Analysis, in 1994 (see the scrambl

ICASSP 2013: Special sessions

ICASSP 2013 (to to held in Vancouver, Canada, May 2013) deadline has been nicely extended to November 30th, 2012. (Rare) updates on Twitter . From the grapevine , the accepted special session list includes the following: Organizers: Mark Plumbley, Dimitris Giannoulis, Mathieu Lagrange Title: Acoustic Event Detection and Scene Analysis. Organizers: Mauro Barni, Fernando Pérez-González Title: Advances in adversary-aware signal processing. Organizers: Tao Zhang and Philip Loizou Title: Challenges, Solutions and Future Directions in Signal Processing Research for Hearing Instruments. Organizers: Ali N. Akansu and Ilya Pollak Title: Financial Signal Processing and Electronic Trading. Organizers: Li Deng, Geoff Hinton, Brian Kingsbury Title: New types of deep neural network learning for speech recognition and related applications. Organizers: Laurent Duval , Leonardo T. Duarte , Christian Jutten Title: Signal Processing for Chemical Sensing . Organizers: Y

SEG 2012: From Las Vegas with notes

Back in 2002 ICASSP , i thought Orlando had a little something... artificial. Fake trees, weird hotels. Ten years later in 2012 SEG (Society of Explorations Geophysicists) annual meeting in Las Vegas, well the fake fragrance mixes even more with air conditioned, and the weather is really cool. No need to keep twitting on the event because Matt Hall at Agile* does it already. The papers i'll have to study a little deeper are the following: Bandwidth enhancement by inverse-Q filtering or time-varying Wiener deconvolution? (Mirko van der Baan), getting the best out of the two techniques. Decon in the log domain with variable gain (Jon Claerbout, Qiang Fu, and Antoine Guitton), revisiting Ricker and Wiener in white/black/white Gabor deconvolution using regularized smoothing (Zengbao Chen et al.), adding regularization on Margrave decon. Guided seismic-to-well tying based on dynamic time warping (Roberto Henry Herrera and Mirko van der Baan) I'm keeping a last word

Who compressively senses compressive sensors?

Who compressively senses the compressive sensing folks (cf. Quis custodiet ipsos custodes? )? In an exchange among technical chairs for a conference with a close deadline, we notice the following mention: Please pay particular attention to reviewers who can deal with compressed sensing papers. Extrapolating from previous years, there are typically almost a 100 papers in compressed sensing - and so we need a lot of capable reviewers in the area. Impressive. So who does compressively sense the compressive sensing community? Nuit Blanche does sense it, maybe not quite compressively (hence, its audience ). I guess there exists redundancy in the published stuff, should one try to reduce drastically the selection on compressive sensing, not based on "peer evaluation", maybe on random picking? Or assuming some Finite Rate of Innovation in a period of time? Hurry up, rumors are the NSF (not NFS nor NHS, thank you Igor ) may shrink the funding on such topics... All along

Adaptive seismic multiple removal with complex wavelet (paper)

The November-December 2012 issue of Geophysics (Volume 77, Issue 6) features (at last) a recent work performed on model-based, adaptive multiple removal in seismic . The concept is illustrated on the figure to the left. Signal obtained from direct reflections of interest (blue) are mixing with other waves bouncing between layers (red). They look alike except for differential attenuation in the frequency domains, different slopes in CMP gathers. Those interested could have a look at the booklet Seismic multiple removal techniques: past, present and future by Eric J. (Dirk) Verschuur . Those more patient may want to waiting for Seismic Multiple Elimination Techniques , by the same author, which should be published in June 2013.As the problem is quite complex per se, hundred of papers have been devoted to multiple elimination techniques, since the January 1948 special issue of Geophysics. A common approach consists in first computing one or several approximate models of the multipl

What is a color?

Typically the kind of image that makes me (still) love image processing. So the "light green" spiraled stripelets have the same absolute color coordinates (yes, R,G,B) as the "light blue" ones. I have checked it with XnView . There is still room for image processing algorithms that meet vision stimuli. The two-penny philosophical question: do these two colors actually merge at the aliased warped end in the center? Indeed, the phenomenon is related to the scale of observation, as one may obseve by zooming in and see how the green and the blue reduce their perceptual distance. Funnily enough, the illusion also works with at least one color blind and image processing specialist colleague (Frédéric Morain-Nicolier @ Pixel Shaker ) who has been kind enough to discuss these issues. So below is the thumbnail and its enlarged version. Of course, you cannot fully trust the present image renderer,. Try by yourself. Akiyoshi Illusion page:

SIVA Conferences : concern fees (update)

Although conferences = concern fees (with the anagram equivalence) for a few organizers, they allow to grab a few call for papers to other conferences. Grabbed from EUSIPCO 2012, along with cfp1 and cfp2 (on time-frequency theory and applications), and after a couple of proofs from a finally painfully published paper in Geophysics , the recent opening of GRETSI 2013 website in Brest, France, provides a good opportunity to release the latest updates on Signal, Image and Volume Analysis (SIVA) Conferences: Eurographics 2013 (Annual conference of the European Association for Computer Graphics) calls for papers on 21/09/2013. CVPR 2015 (IEEE Conference on Computer Vision and Pattern Recognition) is announced in Boston, Massachussetts, USA; ICIP 2016 (IEEE International Conference on Image Processing) in Phoenix, Arizona, USA; ICCV 2015 (International Conference on Computer Vision) in Santiago, Chile.  One of the next target is ICASSP 2013 in Vancouver, Canada, with submi

Time-frequency methods for condition based maintenance: call for papers

Call for Papers (CfP): Special issue on time-frequency methods for condition based maintenance and modal analysis In recent years, research in the area of Condition-Based Maintenance (CBM) and Modal Analysis (MA) has been growing rapidly benefiting from the development of more advanced and accurate time-frequency methods. CBM is a decision making strategy which was introduced to recommend maintenance actions when the output of the sensors placed on the physical equipment fulfill a set of predefined criteria defining abnormal behaviors. CBM is based on using real-time data to prioritize and to optimize maintenance resources. It enables real-time diagnosis of impending failures and prognosis of remaining useful life of equipment without interrupting normal operations through analyzing and interpreting the measured data. Intensively used in CBM, the MA is concerned with the identification of the natural mode shapes and frequencies of structures or fluids under vibrational

Time-frequency analysis and applications: call for papers

[Update 20120925] Special issue call for papers officialy released (deadline extended to 08/10/2012): Special issue on Time-frequency analysis and applications The 4-page white paper should address: the motivations, importance, timeliness of the topics, an outline of the paper structure and content, some words about the authors (for the special issue editors). No style imposed: 4-page one-column would be enough. Fresh from Eusipco 2012 , a call for papers (cfp) is issued by the signal processing society, for IEEE Signal Processing Magazine :  Special issue on Time-frequency analysis and applications The special issue ( not yet on the special issue page ) seeks to present recent advances in time-frequency (TF) signal analysis, using both linear and nonlinear decompositions. Topics include: advances in detection, estimation and classification using TF signatures instantaneous frequency estimation robust TF signal representations new advances in TF localization and uncer

Noble praise

[Update 2014/07/15 ] " Divide ut compresse " (to divide to compress) is the new motto for the coming Daubechies barony. Ingrid Daubechies ( wiki page ) has just been granted? awarded? made a baroness title by the King of Belgium. She is has a PhD in Physics from Vrije Universiteit Brussel (VUB), teaches at Princeton and Duke universities, and is the present president of the "International Mathematical Union". She is famous to waveleters for many progresses, among others, in frame sampling, wavelet design (e.g. daublets & coiflets ), (two-scale) difference equations, orthogonal and biorthogonal bases design, fast, integer, lifting, irregular and signal edge-aware implementation, time-frequency reassignment, inverse problems, fractal properties, compression, with a recent brush(let)strocke towards artist (van Gogh) identification, to mention a few. Have a look... Soon, she will be another distinguished line on

Ternary, trinary or trit logic: of bricks and trytes (and bytes and bits)

Image     The ternary calculating machine of Thomas Fowler [In a word: e (2.71828...) would be the most efficient base for storing digital information. Not two, i.e. the bits. Storing on three-unit devices (trits) would be the best practical information base. Ternary arithmetic rulez ] This short post is inspired by Igor Carron 's The 2-bit Aggie weather station . Igor proposes us the three-valued (bbl) system for assessing weather conditions, with a brick put outside: brown, bright, left: If brick is dark brown, it's a sure sign that it's raining outside.  If the brick is bright, then it's sunny outside.  If the brick is not there anymore, it's a tornado. The weird ternary calculing machine machine on the right is not a brick (althhough the color is similar), and is better described in The ternary calculating machine of Thomas Fowler , IEEE Annals of the History of Computing, 2005, by Glusker, Hogan, and Vass.

Plagiarism: everything but the title

Cannot remember the origin of this picture ( pdf ) [Update: another plagiarism detected on 2014/12/29; This post originated from Grégory Favre news on the excellent EPFL Infodoc mailing list, and concerns to EPFL papers] The pressure of publication pushes back the frontiers of laziness. Here, a sole change in a paper title allows the paper to pass through reviews (if there are any reviews in this case, look at Nuit Blanche on peer review ). If you steal from one author it's plagiarism ; if you steal from many it's research . (attributed to Wilson Mizner) The most interesting example i had seen so far was a paper i reviewed on nonsubsampled contourlets (a kind of discretized, directional wavelet ). It was entitled "A New Image Denoising Scheme using the Nonsubsampled Contourlet Transform", and  submitted in 2008 to Signal Processing by three authors from one of the two most populated countries in the world. Its content had about 60% overlap with a mo

Conference: Fixing mathematical education

[Permission to link to author slides is being asked. Stay tuned, but do not expect too much] Meanwhile, check out Simon Leys (aka Pierre Rickmans) " Le studio de l'inutilité " (or The Hall of uselessness ), with a special attention to Leys' talk on 8 Nov. 2005 at l'Université catholique de Louvain, with its nice quote to Flaubert: "I have always tried to live in an ivory tower; but a tide of shit is beating at its walls, threatening to undermine it. " "Modeling is a life skill" ( Solomon Garfunkel )   "To be able to use maths at a certain level, it is necessary to learn it at the next level" ( Alexandre Borovik )   On April 4h, 2012, a meeting held in IHP , Paris. Under the motto: How to fix our math education (Comment réparer l’enseignement des mathématiques ?) . The main incentive was Solomon GARFUNKEL ( COMAP Inc. , Boston) and David MUMFORD (Brown University) paper "How to fix our math education",

Hyperbolets (on WITS: Where is the Starlet)

A new conference is born: UCCV 2013 , The 1st IEEE Workshop on User-Centred Computer Vision, due in Florida, Tampa. on January 2013. It has been added to SIVA Conferences . While the shearlets are enjoying some spread (cf. Shearlets from MIA 2012 or this paper ), some of their contributors are involved in hyperbolets, or hyperbolic wavelets , closely related cousins. Here they are (as on WITS: where is the Starlet ): Hyperbolets In short: An example of multi-composite wavelets with hyperbolic scaling law Etymology: From the hyperbola ( wiki entry ), with a potential reference (article no available on 2011/05/26) to the parabolic scaling law of the shearlets Origin: Glenn R. Easley, Demetrio Labate, Vishal M. Patel: Multi-composite wavelet estimation , Proceedings of SPIE Volume 8138, Wavelets and Sparsity XIV, Aug. 2011 ( local copy ) Abstract : In this work, we present a new approach to image denoising by using a general representation known as wavelets with

Dry signal processing:: DATs to FIGs

Signal Processing is very akin to dry fruits: this is the very art of transforming .DAT 's in .FIG 's!/laurentduval/status/192746543349108736 Only that? Sure.