1.
Appl Numer Math
; 96: 72-81, 2015 Oct.
Artigo
em Inglês
| MEDLINE
| ID: mdl-26435561
RESUMO
We consider the simultaneous estimation of an optical flow field and an illumination source term in a movie sequence. The particular optical flow equation is obtained by assuming that the image intensity is a conserved quantity up to possible sources and sinks which represent varying illumination. We formulate this problem as an energy minimization problem and propose a space-time simultaneous discretization for the optimality system in saddle-point form. We investigate a preconditioning strategy that renders the discrete system well-conditioned uniformly in the discretization resolution. Numerical experiments complement the theory.
2.
Phys Rev B Condens Matter
; 46(7): 4312-4315, 1992 Aug 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-10004175
3.
Phys Rev B Condens Matter
; 45(16): 8989-8994, 1992 Apr 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-10000759