The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2002
Filed:
Jun. 15, 1999
Shijun Sun, Seattle, WA (US);
Yongmin Kim, Seattle, WA (US);
University of Washington, Seattle, WA (US);
Abstract
The optical flow of an array of pixels in an image field is determined using adaptive spatial and temporal gradients. Artifacts are avoided for image objects which are moving smoothly relative to the image field background. Data from three image frames are used to determine optical flow. A parameter is defined and determined frame by frame which is used to determine whether to consider the data looking forward from frame k to k+1 or the data looking backward from frame k−1 to frame k in initializing spatial and or temporal gradients for frame k. The parameter identifies signifies the areas of occlusion, so that the gradients looking backward from frame k−1 to frame k can be used for the occluded pixel regions. The gradients looking forward are used in the other areas.