極化白化濾波器的一種多通道擴(kuò)展
A Multi-channel Extension of Polarimetric Whitening Filter
-
摘要: 為減小相干斑對(duì)分類、檢測(cè)的影響，通常要對(duì)極化合成孔徑雷達(dá)圖像進(jìn)行相干斑抑制。極化白化濾波器(PWF)是利用多個(gè)極化通道的復(fù)數(shù)據(jù)抑制相干斑的有效方法，但其輸出只有一個(gè)通道。為了在后續(xù)處理中能夠利用全極化數(shù)據(jù)，該文對(duì)PWF進(jìn)行了改進(jìn)，提出了多通道極化白化濾波器法(MCPWF)。該方法在保持PWF最少相干斑圖像輸出的同時(shí)，還能得到各個(gè)極化通道濾波后的輸出。Pi-SAR實(shí)測(cè)數(shù)據(jù)的實(shí)驗(yàn)結(jié)果驗(yàn)證了該方法的有效性。
-
關(guān)鍵詞:
- 極化合成孔徑雷達(dá); 極化白化濾波器; 相干斑抑制
Abstract: In order to reduce the effect of speckle on classification and detection, the polarimetric synthetic aperture radar imagery should be preprocessed to suppress speckle. The Polarimetric Whitening Filter (PWF) is efficient in speckle suppression by using complex data of three polarimetric channels. Nevertheless, it only outputs one channel of data. In this paper, a method called Multi-Channel Polarimetric Whitening Filter (MCPWF) is presented. It maintains the optimal speckle reduction performance of the PWF, and three polarimetric channels of output are obtained as well, so that fully polarimetric data can also be used in advanced processing. The effectiveness of the MCPWF is verified through experimental results of Pi-SAR data. -
Zebker H A, van Zyl J J, Held D N. Imaging radar polarimetry from wave synthesis[J].Journal of Geophysics Research.1987, 92 (B1):683-701[2]Lee J S, Grunes M R, Mango S A. Speckle reduction in multipolarization and multifrequency SAR imagery. IEEE Trans. on GRS, 1991, 29 (4): 535-544.[3]Novak L M, Burl M C. Optimal speckle reduction in polarimetric SAR imagery. IEEE Trans. on AES, 1990, 26 (2): 293-305.[4]Liu Guoqing, Huang Shunji, Torre A, et al.. The Multilook Polarimetric Whitening Filter (MPWF) for intensity speckle reduction in polarimetric SAR images. IEEE Trans. on GRS, 1998, 36 (3): 1016-1020.[5]劉國(guó)慶, 黃順吉, 熊紅等. 多視極化SAR圖像相干斑抑制的研究. 電子科學(xué)學(xué)刊, 1998，20 (3): 379-385.[6]皮亦鳴, 鄒琪, 黃順吉. 極化SAR相干斑抑制極化白化濾波器[J].電子與信息學(xué)報(bào).2002, 24 (5):597-603瀏覽[7]Barnes R M. Detection of randomly polarized target. [Ph. D. dissertation], Department of Electrical Engineering, Northeastern University, Boston, MA, 1984, 6.[8]Novak L M, Burl M C, Irving W W. Optimal polarimetric processing for enhanced target detection. IEEE Trans. on AES, 1993, 29 (1): 234-244. -
計(jì)量
- 文章訪問(wèn)數(shù): 2691
- HTML全文瀏覽量: 120
- PDF下載量: 790
- 被引次數(shù): 0
下載:
