کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
531675 869865 2008 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A homotopy-based approach for computing defocus blur and affine transform simultaneously
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر چشم انداز کامپیوتر و تشخیص الگو
پیش نمایش صفحه اول مقاله
A homotopy-based approach for computing defocus blur and affine transform simultaneously
چکیده انگلیسی

This paper presents a homotopy-based algorithm for a simultaneous recovery of defocus blur and the affine parameters of apparent shifts between planar patches of two pictures. These parameters are recovered from two images of the same scene acquired by a camera evolving in time and/or space and for which the intrinsic parameters are known. Using limited Taylor's expansion one of the images (and its partial derivatives) is expressed as a function of the partial derivatives of the two images, the blur difference, the affine parameters and a continuous parameter derived from homotopy methods. All of these unknowns can thus be directly computed by resolving a system of equations at a single scale. The proposed algorithm is tested using synthetic and real images. The results confirm that dense and accurate estimation of the previously mentioned parameters can be obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Pattern Recognition - Volume 41, Issue 7, July 2008, Pages 2263–2282
نویسندگان
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