초록 ▼

An apparatus and method for implementing object trajectory segmentation for an image sequence. Specifically, block-based motion vectors for a pair of adjacent frames are used to derive optical flow, e.g., affine, motion parameters. The object trajectory segmenter applies the optical flow motion para

An apparatus and method for implementing object trajectory segmentation for an image sequence. Specifically, block-based motion vectors for a pair of adjacent frames are used to derive optical flow, e.g., affine, motion parameters. The object trajectory segmenter applies the optical flow motion parameters to form a new prediction or method for predicting the positions of all the points on an object over time within an interval. The new prediction is then applied and the result is compared with an error metric. The results from such comparison with the error metric will dictate the proper intervals (temporal boundaries) of the image sequence at which the motion parameters are valid for various key objects.

대표청구항 ▼

1. A method for performing object trajectory segmentation for an image sequence having a plurality of frames, said method comprising the steps of:a) obtaining at least one optical flow motion parameter for at least one pixel of an object within the image sequence; b) choosing a model for the traject

1. A method for performing object trajectory segmentation for an image sequence having a plurality of frames, said method comprising the steps of:a) obtaining at least one optical flow motion parameter for at least one pixel of an object within the image sequence; b) choosing a model for the trajectory of said at least one optical flow motion parameter as a function of time over an interval of said image sequence; c) determining trajectory model parameters from said modeled optical flow motion parameter for said interval of said image sequence; and d) evaluating said trajectory model parameters to determine if said interval of said image sequence is to be split, wherein said split operation is applied by dividing said interval of said image sequence into at least two separate intervals of frames.