用神经符号方法自动检测修复视频中物体不一致问题。
ObjectAlign: Neuro-Symbolic Object Consistency Verification and Correction
- 结合可学习阈值与符号推理,判断物体一致性。
- 在DAVIS和Pexels上提升1.4分CLIP Score、6.1分光流误差。
- 适合视频编辑、生成领域研究者使用。
视频编辑与合成常引入物体不一致问题,如帧间闪烁和身份漂移,影响感知质量。为此,我们提出ObjectAlign框架,将感知度量与符号推理融合,实现对编辑视频序列中物体级与时间不一致性的检测、验证与修正。首先,我们为物体一致性度量(基于CLIP的语义相似性、LPIPS感知距离、直方图相关性、SAM生成的掩码IoU)设计可学习阈值。其次,引入神经符号验证器,包含两部分:(a) 基于SMT的形式化检查,作用于掩码物体嵌入,可证明物体身份不漂移;(b) 基于概率模型检验器的时间保真度检查,验证视频形式表示是否符合时序逻辑规范。单个帧过渡被判定为“一致”,需同时满足学习阈值与统一神经符号约束,确保低层稳定性与高层时间正确性。最后,针对连续标记帧块,提出基于神经网络的自适应插值修复方法,动态选择插值深度,从前后有效关键帧重建损坏帧。实验结果表明,在DAVIS和Pexels数据集上,相比当前最优基线,CLIP Score最高提升1.4分,光流误差最高提升6.1分。
原文摘要 · Abstract (English)
Video editing and synthesis often introduce object inconsistencies, such as frame flicker and identity drift that degrade perceptual quality. To address these issues, we introduce ObjectAlign, a novel framework that seamlessly blends perceptual metrics with symbolic reasoning to detect, verify, and correct object-level and temporal inconsistencies in edited video sequences. The novel contributions of ObjectAlign are as follows: First, we propose learnable thresholds for metrics characterizing object consistency (i.e. CLIP-based semantic similarity, LPIPS perceptual distance, histogram correlation, and SAM-derived object-mask IoU). Second, we introduce a neuro-symbolic verifier that combines two components: (a) a formal, SMT-based check that operates on masked object embeddings to provably guarantee that object identity does not drift, and (b) a temporal fidelity check that uses a probabilistic model checker to verify the video's formal representation against a temporal logic specification. A frame transition is subsequently deemed "consistent" based on a single logical assertion that requires satisfying both the learned metric thresholds and this unified neuro-symbolic constraint, ensuring both low-level stability and high-level temporal correctness. Finally, for each contiguous block of flagged frames, we propose a neural network based interpolation for adaptive frame repair, dynamically choosing the interpolation depth based on the number of frames to be corrected. This enables reconstruction of the corrupted frames from the last valid and next valid keyframes. Our results show up to 1.4 point improvement in CLIP Score and up to 6.1 point improvement in warp error compared to SOTA baselines on the DAVIS and Pexels video datasets.
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