ESTIMATING SUBJECT MOTION BETWEEN IMAGE FRAMES

摘要

A method for determining a motion estimate, comprising: capturing at least two digital images of a scene at different capture times; designating one of the digital images as a reference digital image; designating a plurality of image regions; determining motion estimates for each image region by shifting the image regions within the non-reference digital images according to each of a plurality of spatial offsets relative to the image region within the reference digital image, computing merit function values for each spatial offset providing an indication of a difference between the image region in the reference digital image and the shifted image regions, computing a fitting function that provides an estimated merit function value as a function of spatial offset; and determining the motion estimate responsive to the determined non-integer spatial offset. A combined motion estimate is determined using weighting coefficients determined responsive to the shapes of the fitting functions.