کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6423199 1632177 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous optical flow and source estimation: Space-time discretization and preconditioning
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات محاسباتی
پیش نمایش صفحه اول مقاله
Simultaneous optical flow and source estimation: Space-time discretization and preconditioning
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Numerical Mathematics - Volume 96, October 2015, Pages 72-81
نویسندگان
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