遥感图像融合技术在潮间带地形提取中的应用

摘要

A new intertidal zone extraction method based on satellite remote sensing image fusion is presented to overcome the shortcomings of the lacking of intertidal zone data and extraction method, The shift-invariant discrete wavelet transform（SIDWT） algorithm is used for fusing SAR and panchromatic remote sensing images which are taken on different time of the same tidal periodicity, A new fusion rule is presented for complementary information enhancement, The fused approximate coefficients are obtained by weight rule based on edge extracting, Maximum absolution value rule is adopted to fuse the detailed coefficients, Thus the new fused image can outstand the tide intertidal shape, coast line and alongshore zone characteristic for visual interpretation easily, Experimental results for real images demonstrate the effectiveness of the algorithm proposed,%针对潮间带地形资料的缺乏和提取手段的贫乏，提出一种提取潮间带地形的新思路。利用同一潮汐周期不同时相的SAR与全色遥感图像，采用平移不变离散小波变换算法进行图像融合，并采用一种新的融合规则。图像的低频部分采用基于边缘提取的加权规则，高频部分采用绝对值最大原则。对比其他算法，融合结果既能突出潮间带形状，又能突出海岸线特征及近岸地形，更便于后续目视解译。对实际图像的试验结果表明，该方法取得了较好的效果。