Evolution equations on Gabor transforms and their applications
Evolution equations on Gabor transforms and their applications
复制标题
Gabor变换的演化方程及其应用
DOI:
10.1016/j.acha.2012.11.007
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发表时间:
2011
影响因子:
2.5
通讯作者:
H. V. Assen
中科院分区:
文献类型:
--
作者:
R. Duits;Hartmut Fuhr;B. Janssen;M. Bruurmijn;L. Florack;H. V. Assen
We introduce a systematic approach to the design, implementation and analysis of left-invariant evolution schemes acting on Gabor transform, primarily for applications in signal and image analysis. Within this approach we relate operators on signals to operators on Gabor transforms. In order to obtain a translation and modulation invariant operator on the space of signals, the corresponding operator on the reproducing kernel space of Gabor transforms must be left-invariant, ie it should commute with the left-regular action of the reduced Heisenberg group H r. By using the left-invariant vector fields on H r in the generators of our evolution equations on Gabor transforms, we naturally employ the essential group structure on the domain of a Gabor transform. Here we distinguish between two tasks. Firstly, we consider non-linear adaptive left-invariant convection (reassignment) to sharpen Gabor transforms, while maintaining the original signal. Secondly, we consider signal enhancement via left-invariant diffusion on the corresponding Gabor transform. We provide numerical experiments and analytical evidence for our methods and we consider an explicit medical imaging application.
DOI:
10.1007/978-1-4939-7647-8_1
发表时间:
2018
期刊:
Neuromethods
影响因子:
--
作者:
Joshi,AnandA
通讯作者:
Joshi,AnandA