کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6421674 | 1631827 | 2014 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sub-band operators and saddle point wavelets
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
ریاضیات کاربردی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, a concept of sub-band operator is defined, a 2-circular matrix method is developed and the exact bounds of the sub-band operators are obtained. The method to calculate the bounds of the sub-band operators is described by computing the maximum of a function. In addition, it is found that the size of bound of a sub-band operator is very sensitive to the performance of wavelet transforms. So a model to minimize the bounds is built and then a class of wavelets, namely, saddle point wavelets, is designed. Experiments show that some saddle point wavelets with the filters of even lengths perform better than the well-known 9-7-tap wavelet in terms of image compression.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematics and Computation - Volume 227, 15 January 2014, Pages 27-42
Journal: Applied Mathematics and Computation - Volume 227, 15 January 2014, Pages 27-42
نویسندگان
Guoqiu Wang, Qingyun Zou, Mengyun Yang,