Soft Spatial Reasoning
作者: Rafi Ibn Sultan, Md. Sajid Alam Chowdhury, Saleh Zare Zade, Chengyin Li, Prashant Khanduri, Marco Brocanelli, Dongxiao Zhu
分类: cs.CV, cs.AI
发布日期: 2026-09-30
🔗 代码/项目: GITHUB
💡 一句话要点
提出软空间推理以解决LVLMs的早期承诺问题
🎯 匹配领域: 支柱九:具身大模型 (Embodied Foundation Models)
关键词: 空间推理 视觉语言模型 软思维 AdaptSoft 多模态学习 错误传播 梯度对齐
📋 核心要点
- 现有的LVLMs在空间推理中采用硬性思维,导致早期承诺和错误传播的问题。
- 本文提出的软空间推理通过混合标记嵌入形成连续的软状态,允许多个候选项共同影响推理过程。
- 在多种空间基准测试中,软空间推理的性能优于传统的硬性和固定软性CoT方法,显示出显著的提升。
📝 摘要(中文)
大型视觉语言模型(LVLMs)通常通过链式思维(CoT)进行空间推理,采用自回归序列编码中间推理。然而,这种硬性思维在每一步都需要选择单一的离散语言标记,可能导致错误传播。为此,本文提出了软空间推理框架,通过在每个推理步骤中混合标记嵌入形成连续的软状态,允许多个候选项影响下一步的推理。核心是AdaptSoft控制器,根据当前隐藏状态和预测不确定性自适应调整每一步的软度。通过梯度对齐学习目标训练AdaptSoft,实验证明该方法在多种空间基准上优于传统的硬性和固定软性CoT基线。
🔬 方法详解
问题定义:本文解决的是大型视觉语言模型在空间推理中面临的早期承诺问题。现有方法在每一步都需要选择单一标记,导致错误可能在后续推理中传播。
核心思路:论文提出的软空间推理允许在推理步骤中混合多个标记嵌入,形成连续的软状态,从而避免单一选择带来的不确定性和错误传播。
技术框架:整体架构包括一个AdaptSoft控制器,该控制器根据当前的隐藏状态和预测的不确定性自适应调整每一步的软度。该框架不需要中间推理的监督信号,通过梯度对齐学习目标进行训练。
关键创新:最重要的创新在于引入了软思维的概念,使得模型在推理过程中能够保留多个候选项,从而提高空间推理的准确性和灵活性。与现有方法相比,软空间推理能够更好地处理冲突的空间关系。
关键设计:在设计中,AdaptSoft控制器的参数设置和损失函数经过精心设计,以确保在每一步推理中能够有效地控制软度,并且在训练过程中不依赖于中间推理的监督信号。该方法的网络结构与现有LVLMs相似,但在推理过程中引入了新的软状态机制。
🖼️ 关键图片
📊 实验亮点
在多种空间基准测试中,软空间推理方法的性能显著优于传统的硬性和固定软性CoT基线,具体提升幅度达到XX%(具体数据需根据实验结果填写),显示出其在空间推理任务中的有效性和优势。
🎯 应用场景
该研究的潜在应用领域包括机器人导航、自动驾驶、增强现实等需要空间推理的任务。通过提高LVLMs在空间推理中的表现,能够显著提升这些领域的智能系统的决策能力和交互体验,具有重要的实际价值和未来影响。
📄 摘要(原文)
Large Vision-Language Models (LVLMs) commonly perform spatial reasoning through chain-of-thought (CoT), encoding intermediate reasoning as autoregressive sequences of discrete language tokens. Such hard thinking requires committing to a single token at each step, even when the correct spatial interpretation remains uncertain. This early commitment constitutes premature discretization: an incorrect token selection can propagate errors through subsequent reasoning. We propose Soft Spatial Reasoning, a post-training framework that introduces soft thinking for spatial tasks in LVLMs. At each intermediate reasoning step, the LVLM forms a continuous soft state by mixing token embeddings rather than selecting a single token, allowing multiple candidate continuations to influence the next step. The appropriate degree of softness, however, can vary across reasoning steps: retaining multiple candidates may preserve a useful spatial interpretation, but if those candidates imply conflicting spatial relations, mixing them may interfere with subsequent reasoning. At the core of Soft Spatial Reasoning is AdaptSoft, a controller that uses the current hidden state and predictive uncertainty to adapt the degree of softness at each reasoning step. To train AdaptSoft, we introduce a gradient-alignment learning objective that provides a step-specific learning signal for softness control without intermediate reasoning supervision. Across diverse spatial benchmarks, Soft Spatial Reasoning outperforms hard and fixed-soft CoT baselines using the same backbone, as well as a range of existing LVLMs. The source code is available at https://github.com/rafiibnsultan/Soft_Spatial_Reasoning