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Title:
RADAR IMAGE PROCESSING DEVICE, RADAR IMAGE PROCESSING METHOD, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2019/188509
Kind Code:
A1
Abstract:
Provided are a radar image processing device, a radar image processing method, and a radar image processing program that efficiently extract similar blocks, and have increased speckle reduction processing performance relative to calculation cost. This radar image processing device comprises: a search range determination unit that determines a search range on the basis of a reference block and a layover direction, said reference block being set as a focus area within a radar image that is generated from data obtained via imaging radar, and said layover direction being a direction in which layover occurs in the radar image and being estimated from the incident directions of electromagnetic waves that are used in observation via imaging radar; an extraction unit that, by searching within the search range, extracts a similar block included in the search range, said similar block resembling the reference block; and a filtering processing unit that uses the reference block and the extracted similar block to perform filtering processing to reduce speckle occurring in the radar image.

Inventors:
TORIYA Hisatoshi (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
TODA Masato (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
Application Number:
JP2019/011209
Publication Date:
October 03, 2019
Filing Date:
March 18, 2019
Export Citation:
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Assignee:
NEC CORPORATION (7-1 Shiba 5-chome, Minato-ku Tokyo, 01, 〒1088001, JP)
International Classes:
G01S13/90
Foreign References:
CN104867120A2015-08-26
Other References:
CHIERCHIA, G. ET AL.: "Multitemporal SAR Image Despeckl ing Based on Block-Matching and Collaborative Filtering", IEEE TRANSACT IONS ON GEOSCIENCE AND REMOTE SENSING, vol. 55, no. 10, 25 September 2017 (2017-09-25) - 10 October 2017 (2017-10-10), pages 5467 - 5480, XP055638876
POGGI, G. ET AL.: "Non-Local Methods for Filtering Interferometric SAR Datasets", PROCEEDINGS OF THE 2012 TYRRHENIAN WORKSHOP ON ADVANCES IN RADAR AND REMOTE SENSING (TYWRRS, 12 September 2012 (2012-09-12) - 13 December 2012 (2012-12-13), pages 136 - 139, XP055638880
PARRILLI, S. ET AL.: "A Nonlocal SAR Image Denoising Algorithm Based on LLMMSE Wavelet Shrinkage", IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, vol. 50, no. 2, 20 January 2012 (2012-01-20), pages 606 - 616, XP011397751, doi:10.1109/TGRS.2011.2161586
Attorney, Agent or Firm:
SHIMOSAKA Naoki (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
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