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Action Recognition. Karthik Prabhakar UCF REU 2008, Week 8 Report July 11, 2008. Research Topic (refined). ‘Actions From Above’ Tasks – Recognize actions involving: Single-person (running, limping, throwing, etc.) Person-person (meeting, dispersing, following, etc.)

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Action recognition

Action Recognition

Karthik Prabhakar

UCF REU 2008, Week 8 Report

July 11, 2008


Research topic refined
Research Topic (refined)

  • ‘Actions From Above’

  • Tasks – Recognize actions involving:

    • Single-person (running, limping, throwing, etc.)

    • Person-person (meeting, dispersing, following, etc.)

    • Person-vehicle/building (getting-in, getting-out, etc.)

  • Problems to be solved:

    • Moving camera (in addition to moving people/objects)

    • View ‘from above’ (can’t see the entire body)

    • ‘Far-field’ view (maximum of 10-15 pixels per person)


Data collection 1 single person
Data Collection 1(Single-Person)

  • Collected a simple dataset of 7 actions performed by different individuals.

  • Actions include:

    • Walking, Running, Limping, Throwing, Kicking, Picking up an object, and Digging.











Tests on efros et al
Tests on Efroset. al.

  • Recognizing Actionat aDistance. A.A. Efros, A.C. Berg, G. Mori, J. Malik. ICCV 2003.