提出FactoMap,让生成因素在非均匀几何空间中更好解耦。
Beyond Uniform Local Isometry and Topology: FactoMap for Disentangled Representations

- 用因子空间结构建模位置相关几何,突破传统欧氏坐标限制。
- 实验表明匹配该结构可保持因子连续性并实现真正解耦。
- 适合研究生成模型几何本质或需要精确控制生成因素的场景。
许多解耦方法使用欧几里得乘积坐标表示生成因素,但底层因子空间可能具有缠绕、坍缩或位置依赖几何。本文引入因子空间结构,结合因子域、生成器诱导的等价关系和位置依赖尺度,以区分拓扑等价但几何不同的空间。我们证明统计独立的因素未必几何可分:色相与尺度的影响增长速率不同,导致各向异性,固定重缩放无法消除。为此提出因子空间拓扑图(FactoMap),学习由因子空间格点索引的可解释原型。拓扑学习将格点周期性、坍缩和非均匀范围迁移至表征中。实验显示,匹配该结构能保持因子连续性,并实现对底层因子的有效解耦。
原文摘要 · Abstract (English)
Many disentanglement methods represent generative factors using Euclidean product coordinates, although the underlying factor spaces may wrap, collapse, or have position-dependent geometry. We introduce factor-space structure, combining factor domains, generator-induced identifications, and position-dependent scales to distinguish topologically equivalent spaces with different factor geometries. We show that statistically independent factors need not be geometrically separable: hue and scale produce effects that grow at different rates, yielding anisotropy that no fixed rescaling removes. We propose the Factor-Space Topographic Map (FactoMap), which learns interpretable prototypes indexed by a factor-space lattice. Topographic learning transfers the lattice's periodicity, collapses, and non-uniform extent to the representation. Experiments show that matching this structure preserves factor continuity and enables disentanglement of the underlying factors.
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