物理引导的时间交互频率网络,用于跨域的几拍超光谱图像分类
IEEE transactions on neural networks and learning systems
|September 23, 2025
概括
这项研究引入了一种新的以物理为导向的超光谱图像分类网络,通过结合频率信息来改善知识传输. 通过PTFNet,可以提高跨领域的几次拍摄场景的准确性.
科学领域:
- 遥感 遥感 遥感 遥感
- 计算机视觉 计算机视觉
- 信号处理 信号处理
背景情况:
- 短拍学习 (FSL) 和域调整在高光谱图像分类 (HSIC) 中用于解决数据稀缺和分布问题.
- 现有的跨领域FSL方法忽视了关键的频率先验,从而增强了类别歧视和知识转移.
研究的目的:
- 提出一个新的物理导向网络 (PTFNet) 跨领域的少数射击HSIC.
- 使用时间交互频率模块同时提取频率前置和空间特征.
- 为了增强物理属性的多样性,并模仿领域转移.
主要方法:
- 一个轻量级的时间交互频率模块 (TiF-模块) 提取频率和空间特征.
- 一个基于福里埃的光谱增强模块 (SFA-模块) 将频率前置脱,并增强分布多样性.
- 物理的一致性损失调整了嵌入,引导网络学习可转移的知识.
- 多定向的同质原型和不确定性纠正的随机步行策略提高了分类准确性,特别是对于边界像素.
主要成果:
- 拟议的PTFNet在四个公共数据集上表现出色.
- 该方法有效地提取和利用频率先验来改进HSIC.
- 这种方法增强了跨领域的少量设置中的知识转移.
结论:
- 通过集成频率先验,PTFNet提供了跨域少数射击HSIC的开创性解决方案.
- 该网络通过利用物理指导原则,成功解决了现有方法的局限性.
- 结果验证了拟议的模块和战略的有效性,以实现可靠的高光谱图像分类.
相关概念视频
Linear Approximation in Frequency Domain
358
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
358
Classification of Signals
1.3K
In signal processing, signals are classified based on various characteristics: continuous-time versus discrete-time, periodic versus aperiodic, analog versus digital, and causal versus noncausal. Each category highlights distinct properties crucial for understanding and manipulating signals.
A continuous-time signal holds a value at every instant in time, representing information seamlessly. In contrast, a discrete-time signal holds values only at specific moments, often denoted as x(n), where...
A continuous-time signal holds a value at every instant in time, representing information seamlessly. In contrast, a discrete-time signal holds values only at specific moments, often denoted as x(n), where...
1.3K
Force Classification
2.3K
Forces play a crucial role in the study of physics and engineering. They are essential in describing the motion, behavior, and equilibrium of objects in the physical world. Forces can be classified based on their origin, type, and direction of action.
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
2.3K
Classification of Systems-I
552
Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
552
Aggregates Classification
970
Aggregate classification is generally based on its size, petrographic characteristics, weight, and source. Size classification ranges from coarse to fine aggregates, defined by the size of the particles. Coarse aggregates are particles that do not pass through ASTM sieve No. 4, and aggregates that pass through the sieve are fine aggregates.
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
970
IR Frequency Region: Fingerprint Region
1.9K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
1.9K


