提出可学习的相位相关方法,实现对图像间变换关系的显式建模。
Neural Phase Correlation

- 在傅里叶域中学习变换分解基,突破传统相位相关仅限全局平移的限制
- 在心脏MRI和超声心动图数据集上达到或超过已有最优结果
- 适用于非刚性形变与量子系统演化,无需额外损失函数或正则化
对应关系本质上是关系性的:它寻找的是同一场景两次观测之间的未知变换,而非任一图像的内容。然而主流基于学习的方法并未将变换作为架构中的第一类对象。它们独立编码每张图像,依赖学习到的相似性函数或深层解码器隐式发现映射。相位相关是经典例外,直接在傅里叶域测量图像间关系,但其固定基底的刚性使其仅适用于全局平移。本文引入一种可学习的相位相关推广方法,通过学习变换分解的基来打破此限制。相同的代数原语可扩展至密集非刚性形变及酉动力学。在ACDC心脏MRI基准测试中,该框架在两个注册方向上均匹配或超越先前发表的基线;在CAMUS超声心动图数据集上,无需辅助评分或自适应平滑机制即达到最先进水平。应用于一维量子谐振子波函数对的时间演化对时,该框架仅从观测对即可恢复赫米特函数本征态与未知哈密顿量的量子化能级。
原文摘要 · Abstract (English)
Correspondence is fundamentally relational: it seeks the unknown transformation between two observations of a common scene, not the content of either. Yet the dominant learning-based methods do not represent the transformation as a first-class object in the architecture. They encode each image independently and let a learned similarity function or a deep decoder discover the mapping implicitly. Phase correlation is the canonical exception, measuring the inter-image relationship directly in the Fourier domain, but the rigidity of its fixed basis confines it to global translation. We introduce a learned generalization of phase correlation that lifts this restriction by learning the basis on which the transformation decomposes. The same algebraic primitive extends to dense non-rigid deformations and to unitary dynamics. On the ACDC cardiac-MRI benchmark the framework matches or exceeds prior published baselines on both registration directions. On CAMUS echocardiography it matches state-of-the-art without auxiliary scoring or adaptive-smoothness mechanisms. Applied to time-evolved wavefunction pairs of the 1-D quantum harmonic oscillator, the same framework recovers the Hermite-function eigenstates and the quantized energy levels of the unknown Hamiltonian from observation pairs alone.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品;中文卡片由大模型生成,请以原文为准。