کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4645248 | 1632198 | 2014 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stopping rules for iterative methods in nonnegatively constrained deconvolution
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
ریاضیات محاسباتی
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چکیده انگلیسی
We consider the two-dimensional discrete nonnegatively constrained deconvolution problem, whose goal is to reconstruct an object x⁎x⁎ from its image b obtained through an optical system and affected by noise. When the large size of the problem prevents regularization through a direct method, iterative methods enjoying the semi-convergence property, coupled with suitable strategies for enforcing nonnegativity, are suggested. For these methods an accurate detection of the stopping index is essential. In this paper we analyze various stopping rules and, with the aid of a large experimentation, we test their effect on three different widely used iterative regularizing methods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Numerical Mathematics - Volume 75, January 2014, Pages 154–166
Journal: Applied Numerical Mathematics - Volume 75, January 2014, Pages 154–166
نویسندگان
P. Favati, G. Lotti, O. Menchi, F. Romani,