CTAP ：Complementary Temporal Action Proposal Generation[2018-08-07]

[jessiSYJ]

CTAP ：Complementary Temporal Action Proposal Generation

Two type proposal generation (three baseline)

• Sliding window

  advantage: cover all segment

  drawback: imprecise

• Action score based

  typical -- TAG

  advantage: precise

  drawback: 1) generate wrong proposal . 2) omit some correct proposal

  how to solve: 1) offset loss -- adjust boundaries . 2) this paper

Complementary Temporal Action Proposal Generator

Initial Proposal Generation

• Video pre-processing

  two-stream

  a long video -->a sequence of unit-level features

• Actionness score

  binary classifier -->actionness score for each unit