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Action Recognition with Improved Trajectories

• Heng Wang, Cordelia Schmid
• 2013 IEEE International Conference on Computer…
• 2013

Recently dense trajectories were shown to be an efficient video representation for action recognition and achieved state-of-the-art results on a variety of datasets. This paper improves their… (More)

Action recognition by dense trajectories

• Heng Wang, Alexander Kläser, Cordelia Schmid, Cheng-Lin Liu
• CVPR 2011
• 2011

Feature trajectories have shown to be efficient for representing videos. Typically, they are extracted using the KLT tracker or matching SIFT descriptors between frames. However, the quality as well… (More)

Dense Trajectories and Motion Boundary Descriptors for Action Recognition

• Heng Wang, Alexander Kläser, Cordelia Schmid, Cheng-Lin Liu
• International Journal of Computer Vision
• 2012

This paper introduces a video representation based on dense trajectories and motion boundary descriptors. Trajectories capture the local motion information of the video. A dense representation… (More)

Evaluation of Local Spatio-temporal Features for Action Recognition

• Heng Wang, Muhammad Muneeb Ullah, Alexander Kläser, Ivan Laptev, Cordelia Schmid
• BMVC
• 2009

Local space-time features have recently become a popular video representation for action recognition. Several methods for feature localization and description have been proposed in the literature,… (More)

A Robust and Efficient Video Representation for Action Recognition

• Heng Wang, Dan Oneata, Jakob J. Verbeek, Cordelia Schmid
• International Journal of Computer Vision
• 2015

This paper introduces a state-of-the-art video representation and applies it to efficient action recognition and detection. We first propose to improve the popular dense trajectory features by… (More)

Placebo and nocebo effects are defined by opposite opioid and dopaminergic responses.

• David J. Scott, Christian S. Stohler, Christine M. Egnatuk, Heng Wang, Robert A. Koeppe, Jon-Kar Zubieta
• Archives of general psychiatry
• 2008

CONTEXT Placebo and nocebo effects, the therapeutic and adverse effects, respectively, of inert substances or sham procedures, represent serious confounds in the evaluation of therapeutic… (More)

A simple packet-transmission scheme for wireless data over fading channels

• Heng Wang, Narayan B. Mandayam
• IEEE Transactions on Communications
• 2004

In this letter, we present a simplified scheduling scheme for packet transmission over a fading channel which is modeled as a finite-state block channel. We first address the optimal minimum… (More)

The Claviceps purpurea gene encoding dimethylallyltryptophan synthase, the committed step for ergot alkaloid biosynthesis.

• H F Tsai, Heng Wang, J C Gebler, C. Dale Poulter, Christopher L. Schardl
• Biochemical and biophysical research…
• 1995

The first pathway-specific step of ergot alkaloid biosynthesis in the fungus, Claviceps purpurea, is catalyzed by the prenyltransferase, 4-(gamma,gamma-dimethylallyl)tryptophan synthase. Partial… (More)

Infantile-onset symptomatic epilepsy syndrome caused by a homozygous loss-of-function mutation of GM3 synthase

• Michael J. A. Simpson, Harold Dick Cross, +13 authors Andrew H. Crosby
• Nature Genetics
• 2004

We identified an autosomal recessive infantile-onset symptomatic epilepsy syndrome associated with developmental stagnation and blindness. Assuming a founder effect in a large Old Order Amish… (More)

AXES at TRECVid 2012 : KIS , INS , and MED INS + KIS :

• Robin Aly, Kevin McGuinness, +16 authors Cordelia Schmid
• 2013

The AXES project participated in the interactive instance search task (INS), the known-item search task (KIS), and the multimedia event detection task (MED) for TRECVid 2012. As in our TRECVid 2011… (More)

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