Context-Aware Activity Modeling Using Hierarchical Conditional Random Fields

IEEE Transactions on Pattern Analysis and Machine Intelligence
Yingying ZhuAmit K Roy-Chowdhury

Abstract

In this paper, rather than modeling activities in videos individually, we jointly model and recognize related activities in a scene using both motion and context features. This is motivated from the observations that activities related in space and time rarely occur independently and can serve as the context for each other. We propose a two-layer conditional random field model, that represents the action segments and activities in a hierarchical manner. The model allows the integration of both motion and various context features at different levels and automatically learns the statistics that capture the patterns of the features. With weakly labeled training data, the learning problem is formulated as a max-margin problem and is solved by an iterative algorithm. Rather than generating activity labels for individual activities, our model simultaneously predicts an optimum structural label for the related activities in the scene. We show promising results on the UCLA Office Dataset and VIRAT Ground Dataset that demonstrate the benefit of hierarchical modeling of related activities using both motion and context features.

References

Apr 12, 2003·Neural Computation·A L Yuille, Anand Rangarajan
Oct 16, 2007·IEEE Transactions on Pattern Analysis and Machine Intelligence·Lena GorelickRonen Basri
Nov 21, 2007·Trends in Cognitive Sciences·Aude Oliva, Antonio Torralba
Jul 17, 2010·IEEE Transactions on Pattern Analysis and Machine Intelligence·Pedro F FelzenszwalbDeva Ramanan
Dec 7, 2011·IEEE Transactions on Pattern Analysis and Machine Intelligence·Tian LanGreg Mori

❮ Previous
Next ❯

Citations

Mar 10, 2016·IEEE Transactions on Pattern Analysis and Machine Intelligence·Carlos F Crispim-JuniorFrancois Bremond

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
Nandita M NayakAmit K Roy Chowdhury
IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
Qiang ZhangBaoxin Li
IEEE Transactions on Pattern Analysis and Machine Intelligence
Xiaogang WangW Eric L Grimson
IEEE Transactions on Pattern Analysis and Machine Intelligence
Stephen Gould
IEEE Transactions on Pattern Analysis and Machine Intelligence
Minyoung Kim
© 2021 Meta ULC. All rights reserved