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Haze removal for new generation optical sensors

机译:新一代光学传感器的除雾

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摘要

Haze and cloud contamination is a common problem in optical remote-sensing imagery, as it can lead to the inaccurate estimation of physical properties of the surface derived from remote sensing and reduced accuracy of land cover classification and change detection. Haze optimized transform (HOT) is a methodology applicable to radiometric compensation of additive haze effects in visible bands that exhibits a spatially complex distribution over an image. The generic approach of HOT allows for the use of older satellite imaging sensors that include at least two visible bands (e.g. Landsat Thematic Mapper (TM) and Landsat Multispectral Scanner (MSS) sensors). This study proposes modifications to extend HOT applicability to new sensors. The improvements and extended functionality adapt the method to the higher radiometric resolution specifications of newer generation sensors and use percentile-based minimum in the correction procedure to avoid causing fake minimum. Alternative filters are also evaluated to smooth raw HOT output and the cloud mask is generated as an additional output. A Landsat 8 scene of Los Angeles is used to demonstrate the improved methodology. The methodology is applicable to sensors such as QuickBird, Worldview 2/3. More than 20 additional scenes were used to evaluate the effectiveness of the methodology.
机译:雾霾和云雾污染是光学遥感影像中的一个普遍问题,因为它可能导致对源自遥感的地表物理特性进行不正确的估计,并降低土地覆盖分类和变化检测的准确性。雾度优化变换(HOT)是一种适用于对可见波段中的附加雾度效应进行辐射补偿的方法,该方法在图像上表现出空间上的复杂分布。 HOT的通用方法允许使用包含至少两个可见波段的较旧的卫星成像传感器(例如Landsat Thematic Mapper(TM)和Landsat Multispectral Scanner(MSS)传感器)。这项研究提出了一些修改,以将HOT的适用性扩展到新的传感器。改进和扩展功能使该方法适应了新一代传感器的更高辐射分辨率规格,并在校正过程中使用了基于百分位数的最小值,以避免造成假最小值。还评估了其他过滤器,以平滑原始HOT输出,并生成了云掩码作为附加输出。洛杉矶的Landsat 8场景用于演示改进的方法。该方法适用于诸如QuickBird,Worldview 2/3之类的传感器。使用了20多个其他场景来评估该方法的有效性。

著录项

  • 来源
    《International journal of remote sensing》 |2018年第6期|1491-1509|共19页
  • 作者

    Hong Gang; Zhang Ying;

  • 作者单位

    Nat Resources Canada, Canada Ctr Remote Sensing, 560 Rochester St, Ottawa, ON K1S 5K2, Canada;

    Nat Resources Canada, Canada Ctr Remote Sensing, 560 Rochester St, Ottawa, ON K1S 5K2, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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