講演抄録/キーワード |
講演名 |
2014-10-23 16:20
Combination of Entropy and Coherence of HH/VV-Polarimetric SAR Data for Improvement of Target Detection in the Sea ○Kazuo Ouchi・Chan-Su Yang(KIOST) SANE2014-90 |
抄録 |
(和) |
It has been known that the entropy of HH- and VV-polarization synthetic aperture radar (SAR) data is almost equivalent to that derived from quad-polarization data, and that it improves the accuracy of detecting underwater marine cultivation nets. The principle is based on small entropy values of surface scattering from the open sea surface and large values from the dominant random system noise due to little backscatter from the smooth surface above underwater cultivation nets. The same principle can be applied to ship detection, since the entropy is large for multiple scattering from ships against small entropy of the background sea surface. Further, the HH- and VV-polarization images of ships are not correlated because of multiple scattering, yielding little coherence; while those of the sea surface are well correlated. This property can also be used to enhance the ability of ship detection. The present paper examines the ship detection accuracy by comparing the dual-polarization amplitude images, entropy, coherence, and the combinations of entropy and coherence, using TerraSAR-X and Advanced Land Observing Satellite (ALOS) - Phased-Array L-band SAR (PALSAR) images over the Tokyo Bay, Japan. |
(英) |
It has been known that the entropy of HH- and VV-polarization synthetic aperture radar (SAR) data is almost equivalent to that derived from quad-polarization data, and that it improves the accuracy of detecting underwater marine cultivation nets. The principle is based on small entropy values of surface scattering from the open sea surface and large values from the dominant random system noise due to little backscatter from the smooth surface above underwater cultivation nets. The same principle can be applied to ship detection, since the entropy is large for multiple scattering from ships against small entropy of the background sea surface. Further, the HH- and VV-polarization images of ships are not correlated because of multiple scattering, yielding little coherence; while those of the sea surface are well correlated. This property can also be used to enhance the ability of ship detection. The present paper examines the ship detection accuracy by comparing the dual-polarization amplitude images, entropy, coherence, and the combinations of entropy and coherence, using TerraSAR-X and Advanced Land Observing Satellite (ALOS) - Phased-Array L-band SAR (PALSAR) images over the Tokyo Bay, Japan. |
キーワード |
(和) |
Synthetic aperture radar (SAR) / dual-polarization entropy / coherence / target detection / ships / / / |
(英) |
Synthetic aperture radar (SAR) / dual-polarization entropy / coherence / target detection / ships / / / |
文献情報 |
信学技報, vol. 114, no. 264, SANE2014-90, pp. 145-150, 2014年10月. |
資料番号 |
SANE2014-90 |
発行日 |
2014-10-15 (SANE) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SANE2014-90 |
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