4 results about "Event stream" patented technology

The invention discloses a feature point tracking method based on an event camera, and aims to improve the feature point tracking precision. According to the technical scheme, the feature point tracking system based on the event camera is composed of a data acquisition module, an initialization module, an event set selection module, a matching module, a feature point updating module and a templateedge updating module. The initialization module extracts feature points and an edge graph from the image frame. The event set selection module selects an event set S of the feature points from the event flow around the feature point. The matching module matches the S with the template edge around the feature points to solve an optical flow set Gk of n feature points at the moment tk. The feature point updating module calculates a position set FDk + 1 of the n feature points at the tk + 1 moment according to the Gk, and the template edge updating module updates the positions in the PBDk by using IMU data to obtain a position set PBDk + 1 of template edges corresponding to the n feature points at the tk + 1 moment. By adopting the method, the precision of tracking the feature points on the event stream can be improved, and the average tracking time of the feature points can be prolonged.

There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform obtaining video data, creating, based on the video data, a timed metadata track indicating a segment bandwidth and comprising information of a plurality of aligned segments of a media adaptation set such that duration information and size information of each of the aligned segments are included in at least one metadata sample, switching to one of a plurality of representations of the video data based on whether the timed metadata track indicates at least an overflow to an input buffer per each of the plurality of representations, and delivering the one of the plurality of representations to a client as a part of an event stream and based on at least one mode indicated in the event stream.