A Theory of Frequency Domain Invariants: Spherical Harmonic Identities for BRDF/Lighting Transfer and Image Consistency Dhruv Mahajan, Ravi Ramamoorthi, Brian Curless, IEEE Transactions on Pattern Analysis and Machine Intelligence, 2007.
@Article{CG_0128,
author = {Dhruv Mahajan and Ravi Ramamoorthi and Brian Curless},
title = {{A} {T}heory of {F}requency {D}omain {I}nvariants: {S}pherical {H}armonic {I}dentities for {B}{R}{D}{F}/{L}ighting {T}ransfer and {I}mage {C}onsistency},
journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
year = {2007}
}