Lite Any Stereo V2: Faster and Stronger Efficient Zero-Shot Stereo Matching

• URL: http://arxiv.org/abs/2606.24457v1
• Date: Tue, 23 Jun 2026 11:45:09 GMT
• Title: Lite Any Stereo V2: Faster and Stronger Efficient Zero-Shot Stereo Matching
• Abstract summary: Lite Any Stereo V2 is an ultra-fast model series designed for efficient zero-shot stereo matching.<n>LAS2 is developed from both architecture and training perspectives.<n>LAS2-H achieves stronger overall zero-shot performance than the iterative method Fast-FoundationStereo.
• Score: 96.63979376005277
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Recent advances in stereo matching have achieved remarkable accuracy, but often rely on large models, heavy computation, or additional foundation-model priors, making them difficult to deploy on resource-constrained platforms. In contrast, efficient stereo models offer faster inference but are commonly considered less capable of strong zero-shot generalization. In this paper, we challenge this assumption by introducing Lite Any Stereo V2 (LAS2), an ultra-fast model series designed for efficient zero-shot stereo matching. LAS2 is developed from both architecture and training perspectives. Architecturally, we revisit efficient stereo design under practical deployment settings and propose a 2D-only cost aggregation framework, optimized for real inference latency rather than theoretical MACs alone. For training, we develop a three-stage strategy that combines synthetic supervision, self-distillation, and real-world knowledge distillation. To improve the reliability of real-world pseudo supervision, we further introduce pseudo-label filtering and an error-clamping operation, enabling smoother synthetic-to-real transfer. We instantiate LAS2 as a family of models, including feed-forward variants for different efficiency budgets and an iterative variant for higher accuracy. Extensive experiments show that LAS2 achieves state-of-the-art accuracy among efficient stereo methods while maintaining significantly lower latency. Specifically, LAS2-H achieves stronger overall zero-shot performance than the iterative method Fast-FoundationStereo, with 1.8x and 2.7x faster inference on H200 and Orin, respectively. The project page, demos, and code are available at https://tomtomtommi.github.io/LiteAnyStereoV2/.

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