3,831 research outputs found
Dual Attention on Pyramid Feature Maps for Image Captioning
Generating natural sentences from images is a fundamental learning task for
visual-semantic understanding in multimedia. In this paper, we propose to apply
dual attention on pyramid image feature maps to fully explore the
visual-semantic correlations and improve the quality of generated sentences.
Specifically, with the full consideration of the contextual information
provided by the hidden state of the RNN controller, the pyramid attention can
better localize the visually indicative and semantically consistent regions in
images. On the other hand, the contextual information can help re-calibrate the
importance of feature components by learning the channel-wise dependencies, to
improve the discriminative power of visual features for better content
description. We conducted comprehensive experiments on three well-known
datasets: Flickr8K, Flickr30K and MS COCO, which achieved impressive results in
generating descriptive and smooth natural sentences from images. Using either
convolution visual features or more informative bottom-up attention features,
our composite captioning model achieves very promising performance in a
single-model mode. The proposed pyramid attention and dual attention methods
are highly modular, which can be inserted into various image captioning modules
to further improve the performance.Comment: in IEEE Transactions on Multimedia, 202
Experimental preparation and verification of quantum money
A quantum money scheme enables a trusted bank to provide untrusted users with
verifiable quantum banknotes that cannot be forged. In this work, we report an
experimental demonstration of the preparation and verification of unforgeable
quantum banknotes. We employ a security analysis that takes experimental
imperfections fully into account. We measure a total of states
in one verification round, limiting the forging probability to based
on the security analysis. Our results demonstrate the feasibility of preparing
and verifying quantum banknotes using currently available experimental
techniques.Comment: 12 pages, 4 figure
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