Bieniarz, Jakub and Müller, Rupert and Zhu, Xiaoxiang and Reinartz, Peter (2012) Sparse approximation, coherence and use of derivatives in hyperspectral unmixing. Istituto Nazionale di Geofisica e Vulcanologia. Third Annual Hyperspectral Imaging Conference, 14-15 May 2012, Rome, Italy.
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Official URL: http://istituto.ingv.it/l-ingv/convegni-e-seminari/archivio-congressi/convegni-2012/hsi2012-1/hsi2012/view
Abstract
Recently, it has been shown that the spectral unmixing can be regarded as a sparse approximation problem. In our studies we employ predefined dictionaries containing the measured spectra of different materials in a hyperspectral image, where for each pixel the abundance vector can be estimated solving the $\ell_1$ optimization problem. This results in an automation of the unmixing procedure and enables using complex overcomplete dictionaries. However, the reflectance spectra of most materials are highly coherent and this could result in confusion in the mixture estimation. In this work we present a novel approach for spectral dictionary coherence reduction and discuss the feasibility of the methodologies in terms of mutual coherence and approximation error values using overcomplete dictionaries. We compare standard sparse unmixing procedures with our novel derivative method. The presented method was tested on both simulated hyperspectral image as well as on a AVIRIS data.
Item URL in elib: | https://elib.dlr.de/75746/ | |||||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | |||||||||||||||
Title: | Sparse approximation, coherence and use of derivatives in hyperspectral unmixing. | |||||||||||||||
Authors: |
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Date: | 15 May 2012 | |||||||||||||||
Refereed publication: | No | |||||||||||||||
Open Access: | Yes | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | No | |||||||||||||||
In ISI Web of Science: | No | |||||||||||||||
Page Range: | pp. 1-4 | |||||||||||||||
Publisher: | Istituto Nazionale di Geofisica e Vulcanologia | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | Hyperspectral image, unmixing, sparse approximation, basis pursuit, spectral derivative, coherence | |||||||||||||||
Event Title: | Third Annual Hyperspectral Imaging Conference | |||||||||||||||
Event Location: | Rome, Italy | |||||||||||||||
Event Type: | international Conference | |||||||||||||||
Event Dates: | 14-15 May 2012 | |||||||||||||||
Organizer: | The Remote Sensing Laboratory at National Institute for Geophysics and Volcanology | |||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||
HGF - Program: | Space | |||||||||||||||
HGF - Program Themes: | Earth Observation | |||||||||||||||
DLR - Research area: | Raumfahrt | |||||||||||||||
DLR - Program: | R EO - Erdbeobachtung | |||||||||||||||
DLR - Research theme (Project): | R - Vorhaben hochauflösende Fernerkundungsverfahren | |||||||||||||||
Location: | Oberpfaffenhofen | |||||||||||||||
Institutes and Institutions: | Remote Sensing Technology Institute > Photogrammetry and Image Analysis | |||||||||||||||
Deposited By: | Bieniarz, Jakub | |||||||||||||||
Deposited On: | 03 Sep 2012 08:38 | |||||||||||||||
Last Modified: | 31 Jul 2019 19:36 |
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- Sparse approximation, coherence and use of derivatives in hyperspectral unmixing. (deposited 03 Sep 2012 08:38) [Currently Displayed]
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