Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection
The stereographic projection determines a bijection between the two-sphere, minus the North Pole, and the tangent plane at the South Pole. This correspondence induces a unitary map between the corresponding L2 spaces. This map in turn leads to equivalence between the continuous wavelet transform for...
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Mathematical Problems in Engineering
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fthindawi:oai:hindawi.com:10.1155/2009/124904 2023-05-15T17:39:50+02:00 Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection Daniela Roşca Jean-Pierre Antoine 2009 https://doi.org/10.1155/2009/124904 en eng Mathematical Problems in Engineering https://doi.org/10.1155/2009/124904 Copyright © 2009 Daniela Roşca and Jean-Pierre Antoine. Research Article 2009 fthindawi https://doi.org/10.1155/2009/124904 2019-05-26T01:44:00Z The stereographic projection determines a bijection between the two-sphere, minus the North Pole, and the tangent plane at the South Pole. This correspondence induces a unitary map between the corresponding L2 spaces. This map in turn leads to equivalence between the continuous wavelet transform formalisms on the plane and on the sphere. More precisely, any plane wavelet may be lifted, by inverse stereographic projection, to a wavelet on the sphere. In this work we apply this procedure to orthogonal compactly supported wavelet bases in the plane, and we get continuous, locally supported orthogonal wavelet bases on the sphere. As applications, we give three examples. In the first two examples, we perform a singularity detection, including one where other existing constructions of spherical wavelet bases fail. In the third example, we show the importance of the local support, by comparing our construction with the one based on kernels of spherical harmonics. Article in Journal/Newspaper North Pole South pole Hindawi Publishing Corporation North Pole South Pole Mathematical Problems in Engineering 2009 1 13 |
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Open Polar |
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Hindawi Publishing Corporation |
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fthindawi |
language |
English |
description |
The stereographic projection determines a bijection between the two-sphere, minus the North Pole, and the tangent plane at the South Pole. This correspondence induces a unitary map between the corresponding L2 spaces. This map in turn leads to equivalence between the continuous wavelet transform formalisms on the plane and on the sphere. More precisely, any plane wavelet may be lifted, by inverse stereographic projection, to a wavelet on the sphere. In this work we apply this procedure to orthogonal compactly supported wavelet bases in the plane, and we get continuous, locally supported orthogonal wavelet bases on the sphere. As applications, we give three examples. In the first two examples, we perform a singularity detection, including one where other existing constructions of spherical wavelet bases fail. In the third example, we show the importance of the local support, by comparing our construction with the one based on kernels of spherical harmonics. |
format |
Article in Journal/Newspaper |
author |
Daniela Roşca Jean-Pierre Antoine |
spellingShingle |
Daniela Roşca Jean-Pierre Antoine Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection |
author_facet |
Daniela Roşca Jean-Pierre Antoine |
author_sort |
Daniela Roşca |
title |
Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection |
title_short |
Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection |
title_full |
Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection |
title_fullStr |
Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection |
title_full_unstemmed |
Locally Supported Orthogonal Wavelet Bases on the Sphere via Stereographic Projection |
title_sort |
locally supported orthogonal wavelet bases on the sphere via stereographic projection |
publisher |
Mathematical Problems in Engineering |
publishDate |
2009 |
url |
https://doi.org/10.1155/2009/124904 |
geographic |
North Pole South Pole |
geographic_facet |
North Pole South Pole |
genre |
North Pole South pole |
genre_facet |
North Pole South pole |
op_relation |
https://doi.org/10.1155/2009/124904 |
op_rights |
Copyright © 2009 Daniela Roşca and Jean-Pierre Antoine. |
op_doi |
https://doi.org/10.1155/2009/124904 |
container_title |
Mathematical Problems in Engineering |
container_volume |
2009 |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1766140603940208640 |