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50 results on '"Henry, Felix"'

1. Cool-Chic: Perceptually Tuned Low Complexity Overfitted Image Coder

Author

Ladune, Théo, Philippe, Pierrick, Clare, Gordon, Henry, Félix, and Leguay, Thomas

Subjects
Electrical Engineering and Systems Science - Image and Video Processing
Abstract

This paper summarises the design of the Cool-Chic candidate for the Challenge on Learned Image Compression. This candidate attempts to demonstrate that neural coding methods can lead to low complexity and lightweight image decoders while still offering competitive performance. The approach is based on the already published overfitted lightweight neural networks Cool-Chic, further adapted to the human subjective viewing targeted in this challenge., Comment: Challenge on Learned Image Compression (CLIC), DCC2024

Published
2024

2. Low-Consumption Partial Transcoding by HEVC

Author

Abdoli, Mohsen, Henry, Félix, and Clare, Gordon

Subjects
Computer Science - Multimedia
Abstract

A transcoding scheme for the High Efficiency Video Coding (HEVC) is proposed that allows any partial frame modification to be followed by a partial re-compression of only the modified areas, while guaranteeing identical reconstruction of non-modified areas. To this end, first, syntax elements of all Coding Units (CU) in the frame are parsed and decoded according to their scan order. Then CUs that are collocated with a replaced area are re-encoded with new content to generate a partial set of new syntax elements. In order to avoid spatial propagation of the decoding mismatch due to the new content, CUs on the border of the replaced area are losslessly coded such that reconstruction of immediately neighboring CUs in the scan order are protected from the modification. The proposed method has been implemented on top of the HEVC test Model (HM) in All-Intra (AI) coding configuration and experiments show that, depending on the test parameters, it can offer both a bitrate saving (up to 4% in terms of BD-BR) and a transcoding acceleration (up to 83%) compared to a full transcoding scheme.

Published
2023

3. Low-complexity Overfitted Neural Image Codec

Author

Leguay, Thomas, Ladune, Théo, Philippe, Pierrick, Clare, Gordon, and Henry, Félix

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Electrical Engineering and Systems Science - Signal Processing
Abstract

We propose a neural image codec at reduced complexity which overfits the decoder parameters to each input image. While autoencoders perform up to a million multiplications per decoded pixel, the proposed approach only requires 2300 multiplications per pixel. Albeit low-complexity, the method rivals autoencoder performance and surpasses HEVC performance under various coding conditions. Additional lightweight modules and an improved training process provide a 14% rate reduction with respect to previous overfitted codecs, while offering a similar complexity. This work is made open-source at https://orange-opensource.github.io/Cool-Chic/, Comment: Accepted at IEEE MMSP 2023

Published
2023

4. Learn how to Prune Pixels for Multi-view Neural Image-based Synthesis

Author

Milovanović, Marta, Tartaglione, Enzo, Cagnazzo, Marco, and Henry, Félix

Subjects
Computer Science - Multimedia, Computer Science - Artificial Intelligence, Computer Science - Computer Vision and Pattern Recognition
Abstract

Image-based rendering techniques stand at the core of an immersive experience for the user, as they generate novel views given a set of multiple input images. Since they have shown good performance in terms of objective and subjective quality, the research community devotes great effort to their improvement. However, the large volume of data necessary to render at the receiver's side hinders applications in limited bandwidth environments or prevents their employment in real-time applications. We present LeHoPP, a method for input pixel pruning, where we examine the importance of each input pixel concerning the rendered view, and we avoid the use of irrelevant pixels. Even without retraining the image-based rendering network, our approach shows a good trade-off between synthesis quality and pixel rate. When tested in the general neural rendering framework, compared to other pruning baselines, LeHoPP gains between $0.9$ dB and $3.6$ dB on average.

Published
2023
Full Text
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5. An inductive model structure for strict $\infty$-categories

Author

Loubaton, Simon Henry Felix

Subjects
Mathematics - Category Theory, 18N40, 55U35
Abstract

We construct a left semi-model category of ``marked strict $\infty$-categories'' for which the fibrant objects are those whose marked arrows satisfy natural closure properties and are weakly invertible. The canonical model structure on strict $\infty$-categories can be recovered as a left Bousfield localization of this model structure. We show that an appropriate extension of the Street nerve to the marked setting produces a Quillen adjunction between our model category and the Verity model structure for complicial sets, generalizing previous results by the second named author. Finally, we use this model structure to study, in the setting of strict $\infty$-categories, the idea that there are several non-equivalent notions of weak $(\infty,\infty)$-categories - depending on what tower of $(\infty,n)$-categories is used. We show that there ought to be at least three different notions of $(\infty,\infty)$-categories., Comment: 48 pages

Published
2023

6. COOL-CHIC: Coordinate-based Low Complexity Hierarchical Image Codec

Author

Ladune, Théo, Philippe, Pierrick, Henry, Félix, Clare, Gordon, and Leguay, Thomas

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Electrical Engineering and Systems Science - Signal Processing
Abstract

We introduce COOL-CHIC, a Coordinate-based Low Complexity Hierarchical Image Codec. It is a learned alternative to autoencoders with 629 parameters and 680 multiplications per decoded pixel. COOL-CHIC offers compression performance close to modern conventional MPEG codecs such as HEVC and is competitive with popular autoencoder-based systems. This method is inspired by Coordinate-based Neural Representations, where an image is represented as a learned function which maps pixel coordinates to RGB values. The parameters of the mapping function are then sent using entropy coding. At the receiver side, the compressed image is obtained by evaluating the mapping function for all pixel coordinates. COOL-CHIC implementation is made open-source., Comment: Add link to github repository

Published
2022

7. Intra Prediction Using In-Loop Residual Coding for the post-HEVC Standard

Author

Abdoli, Mohsen, Henry, Félix, Brault, Patric, Duhamel, Pierre, and Dufaux, Frédéric

Subjects
Computer Science - Multimedia
Abstract

A few years after standardization of the High Efficiency Video Coding (HEVC), now the Joint Video Exploration Team (JVET) group is exploring post-HEVC video compression technologies. In the intra prediction domain, this effort has resulted in an algorithm with 67 internal modes, new filters and tools which significantly improve HEVC. However, the improved algorithm still suffers from the long distance prediction inaccuracy problem. In this paper, we propose an In-Loop Residual coding Intra Prediction (ILR-IP) algorithm which utilizes inner-block reconstructed pixels as references to reduce the distance from predicted pixels. This is done by using the ILR signal for partially reconstructing each pixel, right after its prediction and before its block-level out-loop residual calculation. The ILR signal is decided in the rate-distortion sense, by a brute-force search on a QP-dependent finite codebook that is known to the decoder. Experiments show that the proposed ILR-IP algorithm improves the existing method in the Joint Exploration Model (JEM) up to 0.45% in terms of bit rate saving, without complexity overhead at the decoder side., Comment: 6 pages, 5 figure, Conference: IEEE 19th International Workshop on Multimedia Signal Processing, Luton, UK

Published
2017

11. Decoder Side Multiplane Images using Geometry Assistance SEI for MPEG Immersive Video

Author

Garus, Patrick, Henry, Felix, Maugey, Thomas, Guillemot, Christine, Analysis representation, compression and communication of visual data (Sirocco), Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-SIGNAL, IMAGE ET LANGAGE (IRISA-D6), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Orange Labs, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique)

Subjects
Multiplane Images, MPEG Immersive Video, [INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV], [MATH.MATH-IT]Mathematics [math]/Information Theory [math.IT], Decoder-Side Depth Estimation
Abstract

International audience; The MPEG Immersive Video (MIV) standard enables a novel technology denoted as decoder side depth estimation (DSDE) by introducing a dedicated Geometry Absent profile. In DSDE only texture information is coded and the corresponding geometry is reconstructed on the decoder side. MIV further enables the coding of side-information useful to the geometry reconstruction, denoted as Geometry Assistance SEI message. An emerging format for immersive video are Multiplane Images, which is investigated for feasibility in coding systems due to their promising rendering quality with complex sequences. In this work, we show that MIV can be used to construct block-based Multiplane Images on the decoder-side and to enhance the view synthesis performance utilizing the Geometry Assistance SEI. In a complexity-aware setting using only 32 planes, up to 6 dB of quality improvement is achieved compared to the reference.

Published
2022

12. Motion Compensation-based Low-Complexity Decoder Side Depth Estimation for MPEG Immersive Video

Author

Garus, Patrick, Henry, Felix, Maugey, Thomas, Guillemot, Christine, Analysis representation, compression and communication of visual data (Sirocco), Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-SIGNAL, IMAGE ET LANGAGE (IRISA-D6), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Orange Labs, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique)

Subjects
Decoder Side Depth Estimation, MPEG Immersive Video, [INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV], Immersive Video Coding, [MATH.MATH-IT]Mathematics [math]/Information Theory [math.IT]
Abstract

International audience; Decoder-Side Depth Estimation (DSDE) is a system firstly enabled in the novel MPEG Immersive Video (MIV) coding standard. In DSDE, only texture components are coded, while the depth is estimated at the decoder-side. This is motivated by previous work, which has shown high coding gain and pixel rate savings in DSDE. However, the computational complexity remains a concern, as high quality depth search has a high runtime and memory requirement. In this work we extend the concept of depth estimation to depth recovery. Using this mode, the decoder-side depth information is recovered through motion compensation utilizing the displacement vectors contained in the texture bitstream. This strategy enables us to replace most of the complex depth estimation processes with a simple motion compensation step, a decision that is drawn on the encoder-side and signaled per coding unit. With only minor losses in terms of synthesis PSNR and similar perceptual quality in terms of MS-SSIM, the complexity is significantly reduced. Depending on the acceptable loss, up to 80% of the moving objects depth may be motion compensated instead of estimated by a depth estimator translating into a speed-up of a factor of 104 for inter-frames compared to the reference depth estimator.

Published
2022

17. Growth Performance, Gonadal Weight and Fecundity: A Comparative Study of Rastrineobola argetea and Roasted Soybean Meal as Protein Ingredients for Brood Stock African Catfish (Clarias gariepinus) in Uganda

Author

Keneth Iceland Kasozi, Abel Patrick Mawadri, Robert Muyinda, Henry Felix Emejje, and Gerald Zirintunda

Subjects
Clarias gariepinus, Fish meal, Animal science, biology, fungi, Soybean meal, food and beverages, Broodstock, biology.organism_classification, Body weight, Fecundity, Brood, Catfish
Abstract

Rastrineobola argetea (fishmeal) was compared to roasted soybean meal as protein ingredients for brood stock African cat fish (Clarias gariepinus) in March 2019 on Geossy farm, Uganda. The fish were observed for growth and reproductive indices. Brood stocks of average weight 327 g were fed on different feeds for a month. Feed A contained soybeans as the sole main protein source. Feed B contained fishmeal as the sole protein source. Feed C was the control (usual farm feeds). Growth indices of B were significantly higher than of A (p = 0.0001, P < 0.05). It is implausible to substitute fishmeal 100% by soybean meal even with heat treatment to remove ant nutritional factors. Fish meal has essential amino acids and fatty acids that are not in soybeans, soybeans can best be used in combination with fishmeal but the most economical ratios need more research. The reproductive indices had no significant differences for feed A, B and control. Replacing fish meal with soybeans had no significant effect on the reproductive indices. Fish meal increases the growth indices and the gonadal weight of Clarias gariepinus, soybean meal is good during brood stock management because it increases fecundity although lighter eggs are observed.

Published
2021

21. Dreams of Nationhood : American Jewish Communists and the Soviet Birobidzhan Project, 1924-1951

Author

Srebrnik, Henry Felix

Subjects
History / United States
Abstract

The American Jewish Communist movement played a major role in the politics of Jewish communities in cities such as Boston, Chicago, Los Angeles, New York, and Philadelphia, as well as in many other centers, between the 1920s and the 1950s. Making extensive use of Yiddish-language books, newspapers, periodicals, pamphlets, and other materials, Dreams of Nationhood traces the ideological and material support provided to the Jewish Autonomous Region of Birobidzhan, located in the far east of the Soviet Union, by two American Jewish Communist-led organizations, the ICOR and the American Birobidzhan Committee. By providing a detailed historical examination of the political work of these two groups, the book makes a substantial contribution to our understanding of twentieth century Jewish life in the United States.

Published
2010

32. Stoßinduzierte Wirbel in der Axialverdichterauslegung

Author

Knobbe-Eschen, Henry Felix Ernst (Dipl.-Ing.)

Subjects
Stoß, Wirbel (Physik), Interaktion, ddc:620, Axialverdichter, Aerodynamik
Abstract

In der vorliegenden Arbeit wird der Einfluss stoßinduzierter Wirbel in der Axialverdichterauslegung diskutiert, indem zunächst geometrische Einflussfaktoren an vereinfachten Schnittsimulationen variiert werden. Ein Ergebnis ist, dass in einer transsonischen Verdichterkonfiguration weder ein großer noch ein geringer Axialabstand zu bevorzugen ist. Die stoßinduzierten Wirbel sind der dominierende instationäre Effekt in transsonischen Verdichtern. Die Wirbel reduzieren oder erhöhen lokal die Geschwindigkeit und beeinflussen so die Hauptströmung und den Rotoranströmwinkel. Eine empirische Korrelationsfunktion zur Wirbeltrajektionsprognose wird analysiert und deren Vorhersagegenauigkeit verbessert. Die Parameterstudien können genutzt werden, um den optimalen Axialabstand im Auslegungsprozess besser zu bestimmen. Im letzten Teil wird gezeigt, dass die Ergebnisse aus den vereinfachten Schnittsimulationen auf reale dreidimensionale Geometrien übertragbar sind. The present work discusses shock induced vortices in a transonic compressor design. The inlet guide vane wake is affected by the shock due to the pressure gradient that curves the wake. To quantify the influence of these vortices, simplified parameter studies have been carried out in a quasi three dimensional setting. Neither a wide nor a small axial gapping is the most favorable in these kinds of compressors due to the vortices. They affect the total pressure ratio, the performance and the surge margin. They reduce or increase the local velocities that affect the rotor boundary layer and the incidence angle. An existing function that predicts the vortex trajectory (B3 function) has been adapted to increase the accuracy. The function uses a steady state simulation to predict the unsteady vortex trajectory. The last part of this work shows three dimensional vortices in the full scale front stage.

Published
2017

34. Creating the Chupah : The Zionist Movement and the Drive for Jewish Communal Unity in Canada, 1898-1921

Author

Henry Felix Srebrnik and Henry Felix Srebrnik

Subjects
Jews, Canadian, Zionism--Canada, Jews--Canada
Abstract

Creating the Chupah assesses the role of Canadian Zionist organizations in the drive for communal unity within Canadian Jewry in the first two decades of the twentieth century. Two strands of Zionism, represented respectively by the Federation of Zionist Societies of Canada and Poale Zion, were often in conflicts that reflected greater disputes. The book also describes Zionist activities within the larger spectrum of Canadian Jewish life. Montreal was at the time the “capital” of Canadian Jewry, but the Jewish communities of Toronto and Winnipeg also played a significant role in these events. Srebrnik here makes a substantial contribution to our understanding of Zionism and twentieth-century Jewish life in Canada.

Published
2011

45. Obituary

Author

Charles Henry Felix Routh

Subjects
Obstetrics and Gynecology
Published
1909

46. Leadership and Control Within an American Jewish Communist Front: The Case of the ICOR

Author

Srebrnik, Henry Felix.

Abstract

Abstract:The Jewish Communist movement in the United States consisted of various groups which championed the goals of the Soviet Union. One such organization was the ICOR; while it involved itself in the various struggles of the Communist left, its main aim was to provide support for the Soviet project to establish a Jewish socialist republic in Birobidzhan. By the mid-1930s it claimed a membership of 11,000, mainly first- and second-generation Yiddish-speaking Jews of east European origin, and it had become a tangible presence in the Jewish community. The ICOR's decision-making structure was organized along Communist lines, and its allegiance to that ideology placed limits on its freedom of manoeuvre. Hence its leadership pursued an agenda ultimately shaped by non-Jewish concerns, and the organization collapsed soon after the onset of the Cold War and the exposure of the Birobidzhan scheme as largely fraudulent.

Published
1998

49. Materialism, the Scientific Bias

Author

H. T. C. and Henry Felix Mins

Subjects
Philosophy, Scientific Bias, Political science, Social science, Materialism, Epistemology
Published
1935

50. Dreams of Nationhood

Author

Srebrnik, Henry Felix

Subjects
History, Birobidzhan, Jews, Judaism, New York (state), Organization for Jewish Colonization in Russia, Soviet Union
Abstract

The American Jewish Communist movement played a major role in the politics of Jewish communities in cities such as Boston, Chicago, Los Angeles, New York, and Philadelphia, as well as in many other centers, between the 1920s and the 1950s. Making extensive use of Yiddish-language books, newspapers, periodicals, pamphlets, and other materials, Dreams of Nationhood traces the ideological and material support provided to the Jewish Autonomous Region of Birobidzhan, located in the far east of the Soviet Union, by two American Jewish Communist-led organizations, the ICOR and the American Birobidzhan Committee. By providing a detailed historical examination of the political work of these two groups, the book makes a substantial contribution to our understanding of twentieth century Jewish life in the United States.

Published
2010
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