2,469 research outputs found
Generative Watermarking Against Unauthorized Subject-Driven Image Synthesis
Large text-to-image models have shown remarkable performance in synthesizing
high-quality images. In particular, the subject-driven model makes it possible
to personalize the image synthesis for a specific subject, e.g., a human face
or an artistic style, by fine-tuning the generic text-to-image model with a few
images from that subject. Nevertheless, misuse of subject-driven image
synthesis may violate the authority of subject owners. For example, malicious
users may use subject-driven synthesis to mimic specific artistic styles or to
create fake facial images without authorization. To protect subject owners
against such misuse, recent attempts have commonly relied on adversarial
examples to indiscriminately disrupt subject-driven image synthesis. However,
this essentially prevents any benign use of subject-driven synthesis based on
protected images.
In this paper, we take a different angle and aim at protection without
sacrificing the utility of protected images for general synthesis purposes.
Specifically, we propose GenWatermark, a novel watermark system based on
jointly learning a watermark generator and a detector. In particular, to help
the watermark survive the subject-driven synthesis, we incorporate the
synthesis process in learning GenWatermark by fine-tuning the detector with
synthesized images for a specific subject. This operation is shown to largely
improve the watermark detection accuracy and also ensure the uniqueness of the
watermark for each individual subject. Extensive experiments validate the
effectiveness of GenWatermark, especially in practical scenarios with unknown
models and text prompts (74% Acc.), as well as partial data watermarking (80%
Acc. for 1/4 watermarking). We also demonstrate the robustness of GenWatermark
to two potential countermeasures that substantially degrade the synthesis
quality
Generated Graph Detection
Graph generative models become increasingly effective for data distribution
approximation and data augmentation. While they have aroused public concerns
about their malicious misuses or misinformation broadcasts, just as what
Deepfake visual and auditory media has been delivering to society. Hence it is
essential to regulate the prevalence of generated graphs. To tackle this
problem, we pioneer the formulation of the generated graph detection problem to
distinguish generated graphs from real ones. We propose the first framework to
systematically investigate a set of sophisticated models and their performance
in four classification scenarios. Each scenario switches between seen and
unseen datasets/generators during testing to get closer to real-world settings
and progressively challenge the classifiers. Extensive experiments evidence
that all the models are qualified for generated graph detection, with specific
models having advantages in specific scenarios. Resulting from the validated
generality and oblivion of the classifiers to unseen datasets/generators, we
draw a safe conclusion that our solution can sustain for a decent while to curb
generated graph misuses.Comment: Accepted by ICML 202
Vision-language models boost food composition compilation
Nutrition information plays a pillar role in clinical dietary practice,
precision nutrition, and food industry. Currently, food composition compilation
serves as a standard paradigm to estimate food nutrition information according
to food ingredient information. However, within this paradigm, conventional
approaches are laborious and highly dependent on the experience of data
managers, they cannot keep pace with the dynamic consumer market and resulting
in lagging and missing nutrition data and earlier machine learning methods
unable to fully understand food ingredient statement information or ignored the
characteristic of food image. To this end, we developed a novel vision-language
AI model, UMDFood-VL, using front-of-package labeling and product images to
accurately estimate food composition profiles. In order to drive such large
model training, we established UMDFood-90k, the most comprehensive multimodal
food database to date. The UMDFood-VL model significantly outperformed
convolutional neural networks (CNNs) and recurrent neural networks (RNNs) on a
variety of nutrition value estimations. For instance, we achieved macro-AUCROC
up to 0.921 for fat value estimation, which satisfied the practice requirement
of food composition compilation. This performance shed the light to generalize
to other food and nutrition-related data compilation and catalyzed the
evolution of other food applications.Comment: 31 pages, 5 figure
Structure of Titan â s induced magnetosphere under varying background magnetic fi eld conditions: Survey of Cassini magnetometer data from fl ybys TA â T85
Cassini magnetic field observations between 2004 and 2012 suggest the ambient field conditions near Titanâs orbit to differ significantly from the frequently applied pre-Cassini picture (background magnetic field homogeneous and perpendicular to Titanâs orbital plane, stationary upstream conditions). In this study, we analyze the impact of these varying background field conditions on the structure of Titanâs induced magnetosphere by conducting a systematic survey of Cassini magnetic field observations in the interaction region during flybys TAâT85 (July 2004âJuly 2012). We introduce a set of criteria that allow to identify deviations in the structure of Titanâs induced magnetosphereâas seen by the Cassini magnetometer (MAG)âfrom the picture of steady-state field line draping. These disruptions are classified as âweakâ, âmoderateâ, or âstrongâ. After applying this classification scheme to all available Titan encounters, we survey the data for a possible correlation between the disruptions of the draping pattern and the ambient magnetospheric field conditions, as characterized by Simon et al. [2010a]. Our major findings are: (1) When Cassini is embedded in the northern or southern lobe of Saturnâs magnetodisk within a ` 3 h interval around closest approach, Titanâs induced magnetosphere shows little or no deviations at all from the steady-state draping picture. (2) Even when Titan is embedded in perturbed current sheet fields during an encounter, the notion of draping the average background field around the moonâs ionosphere is still applicable to explain MAG observations from numerous Titan flybys. (3) Only when Titan is exposed to intense north- south oscillations of Saturnâs current sheet at the time of an encounter, the signatures of the moonâs induced magnetosphere may be completely obscured by the ambient field perturbations. (4) So far, T70 is the only flyby that fully meets the idealized pre-Cassini picture of the Titan interaction (steady background field perpendicular to Titanâs orbital plane, steady upstream flow, unperturbed induced magnetosphere).Fil: Simon, Sven. University of Cologne. Institute of Geophysics and Meteorology; AlemaniaFil: van Treeck, Shari C.. University of Cologne. Institute of Geophysics and Meteorology; AlemaniaFil: Wennmacher, Alexandre. University of Cologne. Institute of Geophysics and Meteorology; AlemaniaFil: Saur, Joachim. University of Cologne. Institute of Geophysics and Meteorology; AlemaniaFil: Neubauer, Fritz M.. University of Cologne. Institute of Geophysics and Meteorology; AlemaniaFil: Bertucci, Cesar. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de AstronomĂa y FĂsica del Espacio(i); ArgentinaFil: Dougherty, Michele K.. Imperial College Of Science And Technology. Space and Atmospheric Physics Group; Reino Unid
Model-based autonomous system for performing dexterous, human-level manipulation tasks
This article presents a model based approach to autonomous dexterous manipulation, developed as part of the DARPA Autonomous Robotic Manipulation Software (ARM-S) program. Performing human-level manipulation tasks is achieved through a novel combination of perception in uncertain environments, precise tool use, forceful dual-arm planning and control, persistent environmental tracking, and task level verification. Deliberate interaction with the environment is incorporated into planning and control strategies, which, when coupled with world estimation, allows for refinement of models and precise manipulation. The system takes advantage of sensory feedback immediately with little open-loop execution, attempting true autonomous reasoning and multi-step sequencing that adapts in the face of changing and uncertain environments. A tire change scenario utilizing human tools, discussed throughout the article, is used to described the system approach. A second scenario of cutting a wire is also presented, and is used to illustrate system component reuse and generality.United States. Defense Advanced Research Projects Agency. Autonomous Robotic Manipulation Progra
Elaboração de um instrumento da assistĂȘncia de enfermagem na unidade de hemodiĂĄlise
Timeâdependent global MHD simulations of Cassini T32 flyby: From magnetosphere to magnetosheath
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95383/1/jgra19655.pd
3D global multiâspecies HallâMHD simulation of the Cassini T9 flyby
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94961/1/grl23831.pd
Comparisons between MHD model calculations and observations of Cassini flybys of Titan
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94689/1/jgra18227.pd
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