ACTION POINTS

Saddle points of stringy action

It is shown that Einstein-Yang-Mills-dilaton theory has a countable family of static globally regular solutions which are purely magnetic but uncharged. The discrete spectrum of masses of these solutions is bounded from above by the mass of extremal Gibbons-Maeda solution. As follows from linear stability analysis all solutions are unstable.

Human Action Recognition Using Key Points Displacement

Recognizing human actions is currently one of the most active research topics. Efros et al. first proposed using optical flow and normalized correlation to recognize distant actions. One weakness of the method is that optical flow is too noisy and cannot reveal the true motions; the other popular method is the space-time-interest-points proposed by Laptev et al., who extended the Harris corner ...

Emotion Recognition from Facial Action Points by Principal Component Analysis

This paper proposes a novel approach to emotion recognition of a subject employing 36 selected facial action points marked at specific locations on their faces. Facial expressions obtained from the subjects enacting them are recorded, and the corresponding changes in marked action points are evaluated. The measurements reveal that the action points have wider variations in facial expressions co...

Group Action Recognition Using Space-Time Interest Points

Group action recognition is a challenging task in computer vision due to the large complexity induced by multiple motion patterns. This paper aims at analyzing group actions in video clips containing several activities. We combine the probability summation framework with the space-time (ST) interest points for this task. First, ST interest points are extracted from video clips to form the featu...

Key points for the Action Plan on Drugs and Addiction