当前位置:首页>南京>ISPRS最新成果|南京航空航天大学薛朝辉团队提出可解释深度展开网络,实现无标记红树林精细测绘

ISPRS最新成果|南京航空航天大学薛朝辉团队提出可解释深度展开网络,实现无标记红树林精细测绘

  • 2026-03-23 23:57:26
ISPRS最新成果|南京航空航天大学薛朝辉团队提出可解释深度展开网络,实现无标记红树林精细测绘

论文摘要

红树林在维持沿海生态系统稳定和支持环境可持续性方面发挥着至关重要的作用,但由于人类活动和气候变化,它们经历了广泛的退化。因此,准确、高效和可靠的测绘结果对于红树林监测和有效管理至关重要。然而,随着对详细监测需求的增加,广泛使用的陆地卫星和哨兵系列图像有限的空间和时间分辨率已证明是不够的。与此同时,基于光谱指数和传统机器学习的现有测绘方法在准确性和泛化性方面存在不足。虽然基于深度学习的方法表现更好,但它们受到对标记样本的高需求和黑箱性质的限制。为了解决这些问题,本研究对图像选择、无标记样本获取和模型可解释性进行了系统探索。首先,选择低潮期且时间上一致的行星范围图像作为数据源,为精细尺度的红树林测绘提供了坚实基础。其次,通过利用光谱指数特征和现有的红树林数据集,提出了一种无标记样本标注策略,以高效获取高质量的训练样本。最后,受表征模型的启发,开发了一种具有可解释决策机制的新型深度展开网络用于红树林测绘,这不仅提高了结果的准确性,还增强了其在政策制定和管理中的可信度。为了验证我们的研究,在中国使用2024年获取的时间上一致的行星范围图像进行了一次全国范围的红树林测绘实验。测绘结果显示,中国的红树林面积为30455公顷,共有14830个斑块。值得注意的是,约45%的斑块面积小于0.1公顷,而超过10公顷的斑块仅占3.5%。在九个代表性测试区域的评估表明,总体准确率在93.51%至97.63%之间。此外,本研究的结果无需人工编辑,在空间细节和覆盖完整性方面比现有的红树林数据集具有显著优势。

关键图表

图 1.用于红树林制图的不同遥感数据源(Landsat 8、Sentinel‑2、PlanetScope)时空差异示意图

图 2.研究区与影像时间分布。(a) 研究区位置;(b) 用于制图的低潮期 PlanetScope 影像时间分布。
图 3.各测试区位置与标注样本空间分布,T1~T9 分别表示测试区 1 至测试区 9。
图 4.本研究总体技术流程。

图 5.红树林与非红树林植被(NM‑vegetation)平均光谱反射率。

图 6.邻域训练样本示意图。尽管网络训练使用的样本大小为 7×7,为更清晰展示,此处显示 64×64 的较大尺寸。

图 7.表征模型、深度学习与深度展开三者之间差异与关系的对比示意图。(a) 表征模型;(b) 深度学习;(c) 深度展开

图 8.MIDU‑Net 网络架构示意图。

图 9.2024 年中国红树林空间分布与面积。(a) 10 km×10 km 格网内红树林分布统计,子图 (i)~(v) 为不同局部区域红树林制图结果;(b) 各省红树林面积及占比。

图 10.不同测试区红树林制图结果精度评价,(a)~(i) 分别对应测试区 1 至测试区 9。

图 11.2024 年中国红树林斑块数量与规模。(a) 不同面积红树林斑块空间分布;(b) 各省最大红树林斑块面积;(c) 各省红树林斑块平均面积;(d) 各省红树林斑块数量;(e) 各省不同面积等级红树林斑块数量与占比。

图 12.本研究结果与非人工编辑红树林数据集在不同区域的空间覆盖与边缘细节对比。(a1)~(c1) GMW v3.0;(a2)~(c2) LREIS‑GM;(a3)~(c3) ESAWC v200;(a4)~(c4) HGMF_2020;(a5)~(c5) 本研究结果。

图 13.本研究结果与人工编辑红树林数据集在不同区域的空间覆盖与边缘细节对比。(a1)~(c1) GMF_2020;(a2)~(c2) MC_2018;(a3)~(c3) MGMC_2019;(a4)~(c4) LSSM_2020;(a5)~(c5) 本研究结果。

图 14.不同红树林数据集在 (a) 总面积与 (b) 斑块数量上的对比。

图 15.NDVI 与 NDWI 阈值敏感性分析。(a)~(b) 为不同 NDVI 阈值对 4 个测试区(T2、T5、T6、T8)制图精度的影响;(e)~(h) 为不同 NDWI 阈值对相同区域制图精度的影响。

图 16.红树林光谱重构残差可视化分析。(a)~(d) 为输入 PlanetScope 影像;(e)~(f) 为红树林光谱特征重构残差。暖色(越接近红色)表示重构精度越高。

图 17.MIDU‑Net 在红树林‑盐沼混合区域的制图效果。(a1)~(d1) 为不同月份影像;(a2)~(d2) 为红树林与盐沼植被光谱差异;(e)~(f) 为对应红树林制图结果。

版权声明

声明:本推文仅用于学习交流,不做其他任何目的。若有侵权,请联系微信号:GeeStudy_2020删除或修改!论文doi链接:https://doi.org/10.1016/j.isprsjprs.2026.02.035点赞、收藏、关注!后台回复:GEE遥感训练营260307,免费获取原文。

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  1. CONNECT:[ UseTime:0.000587s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000903s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000401s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000344s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000611s ]
  6. SELECT * FROM `set` [ RunTime:0.002670s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000670s ]
  8. SELECT * FROM `article` WHERE `id` = 500428 LIMIT 1 [ RunTime:0.000545s ]
  9. UPDATE `article` SET `lasttime` = 1776336203 WHERE `id` = 500428 [ RunTime:0.005828s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000316s ]
  11. SELECT * FROM `article` WHERE `id` < 500428 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000573s ]
  12. SELECT * FROM `article` WHERE `id` > 500428 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000502s ]
  13. SELECT * FROM `article` WHERE `id` < 500428 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001001s ]
  14. SELECT * FROM `article` WHERE `id` < 500428 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001043s ]
  15. SELECT * FROM `article` WHERE `id` < 500428 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001141s ]
0.097212s