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一个基于重建的变压器的双分支融合网络,用于在遥感图像中进行建筑提取
Yitong Wang1, Shumin Wang1, Aixia Dou1
1Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China.
Sensors (Basel, Switzerland)
|January 23, 2024
概括
一个新的双分支融合重建变压器网络 (DFRTNet) 改进了自动从高分辨率遥感图像中提取建筑物. 这种方法增强了全球和本地特征提取,在城市绘图中获得更高的准确性.
科学领域:
- 计算机视觉 计算机视觉
- 遥感 遥感 遥感 遥感
- 人工智能的人工智能
背景情况:
- 自动建筑提取对于城市规划,人口统计和灾害评估至关重要.
- 卷积神经网络 (CNN) 和变压器对于语义细分很常见,但在特征提取方面存在局限性.
- 由于固定的结构,CNN与全球特征作斗争,而变压器在计算上可能是多余的,并且缺乏本地细节.
研究的目的:
- 提出一个新的双分支融合重建变压器网络 (DFRTNet),以从高分辨率遥感图像 (HRSI) 中高效准确地提取建筑物.
- 解决现有的CNN和变压器模型在捕捉全球背景和本地细节方面的局限性.
主要方法:
- 开发了一个具有双分支编码器的DFRTNet,用于本地和全球特征提取.
- 集成了本地和全球特征提取 (LGFE) 模块,为全球特征提供动态范围注意力 (DRA),为细粒度细节提供本地特征提取 (LFE) 分支.
- 使用多层感知器 (MLP) 进行特征融合,并在解码器中使用通道注意模块 (CAM) 进行增强的特征表示.
主要成果:
- 与现有的最先进的方法相比,DFRTNet在建筑细分方面表现优越.
- 在WHU和马萨诸塞州建筑数据集上实现了最佳的细分精度.
- 拟议的网络有效地平衡了全球上下文建模和本地特征提取.
结论:
- DFRTNet提供了一种高效准确的解决方案,用于从HRSI中自动提取建筑物.
- 采用DRA和LFE的双分支架构有效地捕捉了多个尺度的特征.
- 这项研究推进了用于遥感应用的语义细分技术.
相关概念视频
01:28Equivalent Circuits for Practical Transformers
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The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
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01:10Reconstruction of Signal using Interpolation
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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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01:27Transformers in Distribution System
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Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
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01:26The Ideal Transformer
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In single-phase two-winding transformers, two windings are coiled around a magnetic core characterized by cross-sectional area A and magnetic permeability μ. A phasor current i1 enters the left winding while i2 exits the right winding, establishing the fundamental working of the transformer through electromagnetic principles.
Ampere's Law forms the basis of understanding the magnetic field within the transformer. It states that the integral of the magnetic field intensity's...
Ampere's Law forms the basis of understanding the magnetic field within the transformer. It states that the integral of the magnetic field intensity's...
395
01:16Types Of Transformers
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Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
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01:21Energy Losses in Transformers
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In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality, the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
876