Develop a closed form solution for learning the parameters{µ,Φ,σ2}of a subspace identity model where the noise is spherical:
Pr(xij)=Normxij[µ,ΦΦ
T
+σ2I].
Hint: Assume you have exactlyJ= 2 examples of each of theItraining images and base your solution on probabilistic PCA.
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