Cited by 463Human Pose and Action RecognitionHand Gesture Recognition SystemsContext-Aware Activity Recognition Systems

A Multi-stream Bi-directional Recurrent Neural Network for Fine-Grained Action Detection

Singh, Bharat, Marks, Tim K., Jones, Michael, Tuzel, Oncel, Shao, Ming·2016·2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)

Abstract

We present a multi-stream bi-directional recurrent neural network for fine-grained action detection. Recently, twostream convolutional neural networks (CNNs) trained on stacked optical flow and image frames have been successful for action recognition in videos. Our system uses a tracking algorithm to locate a bounding box around the person, which provides a frame of reference for appearance and motion and also suppresses background noise that is not within the bounding box. We train two additional streams on motion and appearance cropped to the tracked bounding box, along with full-frame streams. Our motion streams use pixel trajectories of a frame as raw features, in which the displacement values corresponding to a moving scene point are at the same spatial position across several frames. To model long-term temporal dynamics within and between actions, the multi-stream CNN is followed by a bi-directional Long Short-Term Memory (LSTM) layer. We show that our bi-directional LSTM network utilizes about 8 seconds of the video sequence to predict an action label. We test on two action detection datasets: the MPII Cooking 2 Dataset, and a new MERL Shopping Dataset that we introduce and make available to the community with this paper. The results demonstrate that our method significantly outperforms state-of-the-art action detection methods on both datasets.

Integrity signals

Registry

Crossref · 10.1109/cvpr.2016.216

Cites

35 of 35 references verified0 citation errors · 0 not checkable

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Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Current approaches decouple action segmentation into extracting low-level spatiotemporal features and applying high-level temporal classifiers.

    “Current approaches decouple this task into extracting low-level spatiotemporal features and applying high-level temporal classifiers.”
  • Recurrent models have a limited span of attention.

    “have been found empirically to have a limited span of attention [27]”
  • Sliding window action detectors typically do not capture long-range temporal patterns.

    “recent temporal models have been limited to sliding window action detectors [25, 27, 20], which typically do not capture long-range temporal patterns”
  • mAP is very sensitive to the confidence score assigned to each segment prediction.

    “The key issue is that mAP is very sensitive to a confidence score assigned to each segment prediction.”
  • Recurrent models are difficult to interpret.

    “recurrent models [27, 9], which can capture latent temporal patterns but are difficult to interpret”

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Authors
Singh, B., Marks, T. K., Jones, M., Tuzel, O., & Shao, M.
Affiliations
  • University of Maryland, College Park (US)
  • Mitsubishi Electric Research Laboratories (United States) (US)
  • Northeastern University (US)
Venue
2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
Publisher
IEEE
Published
2016-06
Pages
1961-1970
ISSN
1063-6919 (ISSN-L)
OpenAlex
W2461621749
Cited by
461
References
35
Citations by year
2026: 12 · 2025: 25 · 2024: 36 · 2023: 48 · 2022: 51 · 2021: 65 · 2020: 63 · 2019: 79 · 2018: 41 · 2017: 38 · 2016: 3
FWCI
18.62
Type
conference paper
Language
en
Open access
closed
Locations
IEEE Computer Society Conference on Computer Vision and Pattern Recognition/Proceedings - IEEE Computer Society Conference on Computer Vision and Pattern Recognition/Proceedings (publishedVersion)
Topics
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Human Pose and Action Recognition
  • Physical Sciences › Computer Science › Human-Computer Interaction › Hand Gesture Recognition Systems
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
Keywords
bidirectional LSTM, human tracking, bounding box tracking, motion features, appearance features, video action recognition

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