A Differential Approach for Gaze Estimation

Non-invasive gaze estimation methods usually regress gaze directions directly from a single face or eye image. However, due to important variabilities in eye shapes and inner eye structures amongst individuals, universal models obtain limited accuracies and their output usually exhibit high variance as well as biases which are subject dependent. Therefore, increasing accuracy is usually done through calibration, allowing gaze predictions for a subject to be mapped to his/her actual gaze. In this paper, we introduce a novel image differential method for gaze estimation. We propose to directly train a differential convolutional neural network to predict the gaze differences between two eye input images of the same subject. Then, given a set of subject specific calibration images, we can use the inferred differences to predict the gaze direction of a novel eye sample. The assumption is that by allowing the comparison between two eye images, annoyance factors (alignment, eyelid closing, illumination perturbations) which usually plague single image prediction methods can be much reduced, allowing better prediction altogether. Experiments on 3 public datasets validate our approach which constantly outperforms state-of-the-art methods even when using only one calibration sample or when the latter methods are followed by subject specific gaze adaptation.Comment: Extension to our paper A differential approach for gaze estimation with calibration (BMVC 2018) Submitted to PAMI on Aug. 7th, 2018 Accepted by PAMI short on Dec. 2019, in IEEE Transactions on Pattern Analysis and Machine Intelligenc

The Circumnuclear Ring of Ionized Gas in NGC3593

We present the results of narrow-band Halpha+NII imaging of the early-type spiral NGC3593 in combination with a study of the flux radial profiles of the NII (lambda: 654.80, 658.34 nm), Halpha, and SII (lambda: 671.65, 673.08 nm) emission lines along its major axis. The galaxy is known to contain two counterrotating stellar discs of different size and luminosity. We find that the Halpha emission mainly derives from a small central region of 57 arcsec x 25 arcsec. It consists of a filamentary pattern with a central ring. This has a diameter of about 17 arcsec (~ 0.6/h kpc) and it contributes about half of the total Halpha flux. The ring is interpreted as the result of the interaction between the acquired retrograde gas which later formed the smaller counterrotating stellar disc and the pre-existing prograde gas of the galaxy.Comment: Accepted for pubblication in Astronomy and Astrophysics; one latex file (corsini.tex), and 2 encapsulated postscript figures (corsini_fig1.ps,corsini_fig2.ps). To be compiled with aa.cls latex2e macro style (pslatex option): 6 pages after latex compilatio

The bulge-disk orthogonal decoupling in galaxies: NGC 4698 and NGC 4672

We report the case of the geometrical and kinematical decoupling between the bulge and the disk of the Sa galaxy NGC 4698. The R-band isophotal map of this spiral shows that the bulge structure is elongated perpendicularly to the major axis of the disk. At the same time a central stellar velocity gradient is found along the major axis of the bulge. We also present the Sa NGC 4672 as good candidate of a spiral hosting a bulge and a disk orthogonally decoupled with respect to one other. This decoupling of the two fundamental components of a visible galaxy suggests that the disk could represent a second event in the history of early-type spirals.Comment: 4 pages, 3 figures (LaTeX, cupconf.sty). To appear in "The Formation of Bulges" C. M. Carollo, H. C. Ferguson, R. F. G. Wyse (eds.), Cambridge University Pres

Service-Learning for Infrastructure Improvements in Herald Square - Accuracy

Generation of Terrestrial LiDAR model to assist in the design of public infrastructure

Mocambos: natureza, cultura e memória

In this article it is discussed the established relations between the hut inhabitants (quilombolas) in low Amazon rainforest and the nature. It is observed these individuals in the escape and societal reproduction process. Also, it is discussed the life experiences of the Macombo descendants’ communities established at the rivers and lakes in that Amazon region during the nineteenth century. Th ese communities have in cultural practices, their memories and stories the sense of belonging and legitimacy of land ownership.Key words: quilombos, nature, Amazon.No presente artigo, discutem-se as relações estabelecidas entre os mocambeiros do Baixo Amazonas e a natureza. Observam-se esses indivíduos no processo de fuga e de reprodução das sociedades quilombolas e mediante as vivências das comunidades descendentes dos mocambos que se constituíram nos rios e lagos daquela região ao longo do século XIX. Essas comunidades têm, nas práticas culturais, nas memórias e nas suas histórias, o sentido de pertença e de legitimidade da posse da terra. Palavras-chave: quilombos, natureza, Amazônia

Mocambos: natureza, cultura e memória

In this article it is discussed the established relations between the hut inhabitants (quilombolas) in low Amazon rainforest and the nature. It is observed these individuals in the escape and societal reproduction process. Also, it is discussed the life experiences of the Macombo descendants’ communities established at the rivers and lakes in that Amazon region during the nineteenth century. Th ese communities have in cultural practices, their memories and stories the sense of belonging and legitimacy of land ownership.Key words: quilombos, nature, Amazon.No presente artigo, discutem-se as relações estabelecidas entre os mocambeiros do Baixo Amazonas e a natureza. Observam-se esses indivíduos no processo de fuga e de reprodução das sociedades quilombolas e mediante as vivências das comunidades descendentes dos mocambos que se constituíram nos rios e lagos daquela região ao longo do século XIX. Essas comunidades têm, nas práticas culturais, nas memórias e nas suas histórias, o sentido de pertença e de legitimidade da posse da terra. Palavras-chave: quilombos, natureza, Amazônia

Diseño de filtros elípticos analógicos.

En el presente trabajo se considera que para el Filtro Analógico Pasabajo Elíptico, el borde límite de la banda pasante está normalizado a 1 (uno) y el máximo de la banda pasante al valor de 1 (uno). Veremos el diseño con una aplicación