Patent ID: 9589365
Date: 2017-03-07
CPC Classifications: G06K,G06T

Claim:
1. A method for expressing a motion object, the method comprising: obtaining a stereo image of the motion object, the stereo image including a depth image; extracting a key point from the motion object in the stereo image; determining a dominant direction of the key point, based on statistical information associated with three-dimensional motion of pixels within a first region surrounding the key point wherein determining the dominant direction includes, determining, based on the dominant direction of the key point, motion vectors of pixels within a second region surrounding the key point to obtain rotation invariant motion vectors; and generating, based on the determined motion vectors of the pixels within the second region surrounding the key point, a feature associated with the key point; and generating a classification signal based on the generated feature, the classification signal including information indicating a classification of the motion object.