Blank Rome LLP
Fast template-based tracking
Techniques to identify and track a pre-identified region-of-interest (ROI) through a temporal sequence of frames/images are described. In general, a down-sampled color gradient (edge map) of an arbitrary sized ROI from a prior frame may be used to generate a small template. This initial template may be used to identify a region of a new or current frame that may be overscan and used to create a current frame's edge map. By comparing the prior frame's template to the current frame's edge map, a cost value or image may be found and used to identify the current frame's ROI center. The size of the current frame's ROI may be found by varying the size of putative new ROIs and testing for their congruence with the prior frame's template. Subsequent ROI's for subsequent frames may be identified to, effectively, track an arbitrarily sized ROI through a sequence of video frames.
Apple Inc.
G G G G G G G
G06T G06T G06T G06T G06V G06T G06T
inventional inventional inventional additional inventional additional inventional
Richard D. Geoffrey T. Jianping Xiaoxing Marco
Seely Anneheim Zhou Li Zuliani