Patent ID: 8311319
Filing Date: 2012-11-13
Classification: G06K

Abstract:
1. An Active Appearance Model machine, comprising: a learn module providing a model image of a class of object, said model image being created by combining feature information from an image library of true image samples of said class of object, said learn module further providing a statistical model fitting function defining shape and appearance features of said class of object; an input for receiving an input image; and an align module optimizing said statistical model fitting function to determine a best fit of said model image and said input image through iterative applications of said statistical model fitting function to produce an aligned image; wherein in each of said iterative applications, a shape parameter coefficient p and an appearance parameter coefficient λ within said statistical model fitting function are updated by L wherein A=appearance base (i.e. current appearance of the model image within a current iteration), SD=a steepest descent matrix for shape coefficients, C(λ)=coefficient matrix dependent on current appearance parameters, Δp=update in the shape projection coefficients, Δλ=update in the appearance projection coefficients, and I(p)=appearance extracted from the input image based on current shape parameters within a current iteration.