A new local affine invariant feature descriptor is proposed.First,a new feature named as multiscale autoconvolution entropy(MSAE)is constructed based on multiscale autoconvolution(MSA).Second,MSAE is proved to be affine invariant.Then MSA is combined with MSAE using generalized canonical correlation analysis(GCCA)to obtain a new feature with more information which can be seen as a new local affine invariant feature descriptor.Finally,the maximally stable extremal region(MSER)is described by the new descript...