Patent ID: 8724851
Filing Date: 2014-05-13
Classification: G06T

Abstract:
1. An aerial survey video processing apparatus, adapted to analyse aerial survey video, comprising: an input section for receiving the video to be analysed as a sequence of frames; memory for storing a list of features being tracked in the video, and memory for storing a list of objects of interest in the video; a motion tracking section adapted to calculate the relative motion between the field of view of a previous frame and the field of view of a current frame; a location prediction section adapted to predict the location in the current frame of each item in the list of features being tracked, based on the location in the previous frame and the relative motion calculated by the motion tracking section; a feature detection section adapted to identify features in the current frame; a feature tracking section adapted to: associate identified features with items in the list of features being tracked, based on the predicted location of the features being tracked; update the list of features being tracked with the location of the associated identified features in the current frame; remove from the list of features being tracked items that are not associated with a feature identified in the current frame; add to the list of features being tracked features identified in a region of the current frame that was not in the field of view of the previous frame; and add to the list of objects of interest information on features being tracked whose predicted location is off the current frame and whose tracked motion is judged to have traversed the field of view; and an output section for outputting data on the resulting list of objects of interest.