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基于梯度域的高辐射分辨率遥感图像动态范围压缩算法

DOI: 10.6046/gtzyyg.2013.02.03, PP. 15-20

Keywords: 高辐射分辨率遥感图像(HRRRSI),梯度域,动态范围压缩

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Abstract:

针对高辐射分辨率遥感图像(highradiationresolutionremotesensingimage,HRRRSI)在普通显示设备上的显示问题,提出了一种适用于HRRRSI显示的新算法。该算法通过对高辐射分辨率图像中大梯度域的梯度衰减来实现,能够在常用的显示设备上对HRRRSI的细节信息进行精确显示。该算法实现的技术路线为:首先,对真实HRRRSI的亮度动态变化范围进行压缩处理;然后,将压缩后的遥感图像进行重建,得到低动态域的图像;最后,通过与常用的线性拉伸处理结果进行对比,验证该算法的有效性。结果表明,本文算法在实现HRRRSI灰度动态范围大幅度压缩的同时,能够较好地保持图像的细节信息和抑制一般的边缘效应。

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