本文關(guān)鍵詞：單波束水深約束的側(cè)掃聲吶圖像三維微地形反演　出處：《哈爾濱工程大學學報》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 側(cè)掃聲吶圖像 微地形反演 明暗形狀恢復 約束方法 地形頻譜分析

【摘要】：高分辨率海底微地形可呈現(xiàn)更豐富的海床細節(jié)特征,對水下目標正確判讀具有重要意義。除去底質(zhì)因素影響,側(cè)掃聲吶圖像明暗變化與海底地形起伏變化有關(guān),挖掘側(cè)掃聲吶圖像中的微地形信息,可以彌補現(xiàn)有測深手段分辨率上的不足。針對SFS方法從側(cè)掃聲吶圖像反演出的相對地形缺少起伏尺度約束和起算基準等問題,本文通過小波分析方法從單波束數(shù)據(jù)中分別提取與側(cè)掃聲吶圖像反演地形相關(guān)的高頻地形及表征地形趨勢變化的低頻地形,以此構(gòu)建側(cè)掃聲吶反演地形的尺度約束及基準改正模型。試驗獲得的反演地形從整體趨勢到細節(jié)特征均與真實地形具有較好的一致性,統(tǒng)計結(jié)果表明,反演地形內(nèi)、外符合均方根誤差均小于15 cm,反演地形整體精度與單波束地形相當。
[Abstract]:The high-resolution seabed microtopography can present more detailed features of seabed, which is of great significance for the correct interpretation of underwater targets. Except for the influence of bottom material, the variation of light and dark of side-scan sonar image is related to the fluctuation of submarine topography. The micro-terrain information in the side-scan sonar image is excavated. It can make up for the deficiency in the resolution of the existing sounding methods. Aiming at the problem that the relative terrain of the inverse performance of the SFS method from the side-scan sonar image lacks the undulating scale constraints and the starting datum and so on. In this paper, the high frequency terrain associated with side scan sonar image inversion and the low frequency terrain which represent the change of terrain trend are extracted from single beam data by wavelet analysis method. The scale constraints and datum correction model of side-scan sonar inversion terrain are constructed. The obtained inversion terrain features from the overall trend to the details are in good agreement with the real terrain, the statistical results show. In the inversion terrain, the root mean square error of the outer coincidence is less than 15 cm, and the whole precision of the inversion terrain is equivalent to that of the single beam terrain.
【作者單位】： 武漢大學測繪學院;東華理工大學江西省數(shù)字國土重點實驗室;武漢大學動機學院;
【基金】：國家自然科學基金項目(41376109,41576107,41606114) 江西數(shù)字國土重點實驗室開放基金項目(DLLJ201502) 精密工程與工業(yè)測量國家測繪局重點實驗室開放基金項目(PF2015-7)
【分類號】：P229.1
【正文快照】： 網(wǎng)絡(luò)出版地址:http://www.cnki.net/kcms/detail/23.1390.u.20170426.1031.010.html隨著我國海洋開發(fā)向遠海深海推進,各種海洋活動對海床地形的質(zhì)量和分辨率也提出了更高的要求[1-2]。精細的海床地形可表征海床表面“麻坑”或“丘頂”等微觀特征[3-4],對發(fā)現(xiàn)天然氣水合物疑似，

本文編號：1435972