计算机科学 ›› 2023, Vol. 50 ›› Issue (5): 161-169.doi: 10.11896/jsjkx.220300110
胡绍凯1, 赫晓慧2, 田智慧2
HU Shaokai1, HE Xiaohui2, TIAN Zhihui2
摘要： 针对高分辨率遥感影像土地利用多分类结果中地块结构不完整、边界质量差的问题,提出了基于MLUM-Net模型的遥感影像土地利用多分类方法。该方法利用多尺度空洞卷积和通道注意力机制构造MDSPA编码器,提高了网络多尺度特征提取能力与地块位置定位的准确性,并通过空间注意力机制自适应增强了多尺度特征表达;为消除上采样语义损失和减少分类结果噪声,设计了混合池化上采样优化模块,用于优化分类结果并消除网络分类误差;根据土地利用多分类数据集类别占比不均衡的特点和地块结构的相似性指数设计混合损失函数,消除数据类别占比产生的影响,提高地块结构完整性和精细化分类边界。在多个数据集上进行了实验验证,总体精度和kappa指标均有明显提高,其分类结果结构完整且边缘划分准确,在土地利用多分类领域具有较好的实用价值。
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