549 research outputs found
MetaStyle: Three-Way Trade-Off Among Speed, Flexibility, and Quality in Neural Style Transfer
An unprecedented booming has been witnessed in the research area of artistic
style transfer ever since Gatys et al. introduced the neural method. One of the
remaining challenges is to balance a trade-off among three critical
aspects---speed, flexibility, and quality: (i) the vanilla optimization-based
algorithm produces impressive results for arbitrary styles, but is
unsatisfyingly slow due to its iterative nature, (ii) the fast approximation
methods based on feed-forward neural networks generate satisfactory artistic
effects but bound to only a limited number of styles, and (iii)
feature-matching methods like AdaIN achieve arbitrary style transfer in a
real-time manner but at a cost of the compromised quality. We find it
considerably difficult to balance the trade-off well merely using a single
feed-forward step and ask, instead, whether there exists an algorithm that
could adapt quickly to any style, while the adapted model maintains high
efficiency and good image quality. Motivated by this idea, we propose a novel
method, coined MetaStyle, which formulates the neural style transfer as a
bilevel optimization problem and combines learning with only a few
post-processing update steps to adapt to a fast approximation model with
satisfying artistic effects, comparable to the optimization-based methods for
an arbitrary style. The qualitative and quantitative analysis in the
experiments demonstrates that the proposed approach achieves high-quality
arbitrary artistic style transfer effectively, with a good trade-off among
speed, flexibility, and quality.Comment: AAAI 2019 spotlight. Supplementary:
http://wellyzhang.github.io/attach/aaai19zhang_supp.pdf GitHub:
https://github.com/WellyZhang/MetaStyle Project:
http://wellyzhang.github.io/project/metastyle.htm
Two Binary trees of Rational numbers -- the S-tree and the SC-tree
In this study, we explore a novel approach to demonstrate the countability of
rational numbers and illustrate the relationship between the Calkin-Wilf tree
and the Stern-Brocot tree in a more intuitive manner. By employing a growth
pattern akin to that of the Calkin-Wilf tree, we construct the S-tree and
establish a one-to-one correspondence between the vertices of the S-tree and
the rational numbers in the interval using 0-1 sequences. To broaden
the scope of this concept, we further develop the SC-tree, which is proven to
encompass all positive rational numbers, with each rational number appearing
only once. We also delve into the interplay among these four trees and offer
some applications for the newly introduced tree structures.Comment: 24 pages, 15 figures, v
The Influence of Social Comparison and Peer Group Size on Risky Decision-Making
This study explores the influence of different social reference points and different comparison group sizes on risky decision-making. Participants were presented with a scenario describing an exam, and presented with the opportunity of making a risky decision in the context of different information provided about the performance of their peers. We found that behavior was influenced, not only by comparison with peers, but also by the size of the comparison group. Specifically, the larger the reference group, the more polarized the behavior it prompted. In situations describing social loss, participants were led to make riskier decisions after comparing themselves against larger groups, while in situations describing social gain, they become more risk averse. These results indicate that decision making is influenced both by social comparison and the number of people making up the social reference group
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