Methods and systems for multimedia trajectory annotation

摘要

A system and method of providing annotated trajectories by receiving image frames from a video camera and determining a location based on the image frames from the video camera. The system and method can further include the steps of determining that the location is associated with a preexisting annotation and displaying the preexisting annotation. Additionally or alternatively, the system and method can further include the steps of generating a new annotation automatically or based on a user input and associating the new annotation with the current location.

主权项

1. A method of providing annotated trajectories, the method comprising:
receiving at least one image frame from a video camera of a mobile device, wherein the at least one image frame comprises at least one feature point; determining a location based on the at least one feature point of the at least one image frame; generating an annotation; associating the annotation with the location; determining that a second mobile device is nearby; determining that the second mobile device is associated with an entry of a contact in an address book of the mobile device; communicating with the second mobile device; generating a second annotation automatically as a new event based on the communication with the second mobile device, determining that a third annotation is associated with the location and an object in the at least one image frame; and displaying, on a display of the mobile device, a visual representation of the third annotation that overlays a portion of the at least one image frame, wherein determining the location based on the at least one feature point of the at least one image frame comprises:
identifying the at least one feature point in the at least one image frame from the video camera;determining feature point information for the at least one feature point;receiving at least one subsequent image frame from the video camera; andidentifying the at least one feature point in the at least one subsequent image frame from the video camera, wherein the location is determined based on changes in positions of the at least one features point between the at least one image frame and the at least one subsequent image frame.