SA-VIS: Sparse frame Annotations for training Video Instance Segmentation

• URL: http://arxiv.org/abs/2606.20140v1
• Date: Thu, 18 Jun 2026 12:03:04 GMT
• Title: SA-VIS: Sparse frame Annotations for training Video Instance Segmentation
• Abstract summary: Recent online video instance segmentation (VIS) methods have achieved impressive results, thus becoming the preferred approach to segment instances in videos.<n>However, a training setup of VIS is expensive in the sense of compute as well as dense annotations required.<n>We argue that the effective modeling of the instances and their evolution in videos do not require densely annotated frames.<n>This simple low-compute module provides tremendous learning capability in using sparse video frame labels for end-to-end training.
• Score: 58.2561806729996
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Recent online video instance segmentation (VIS) methods have achieved impressive results, thus becoming the preferred approach to segment instances in videos. Despite the resurgence of impressive single image models, the online (or semi-online) VIS approaches outperform single-image models (e.g., based on SAM) by using long sequences of densely annotated frames during training. However,such a training setup of VIS is expensive in the sense of compute as well as dense annotations required. In order to solve these major flaws, we argue that the effective modeling of the instances and their evolution in videos do not require densely annotated frames. To that end, we propose a simple and effective module, called Past-frames Feature Propagation (PFP) which aggregates low-dimensional features from the image encoder of multiple frames. This simple low-compute module provides tremendous learning capability in using sparse video frame labels for end-to-end training. Combined with a light-weight frame-specific Instance Queries, our Sparse frame Annotation VIS (SA-VIS) significantly improves performance over its baseline. Most interestingly, our simple design that avoids complexities effectively bridges the gap in accuracy between training on sparsely and densely annotated video sequences. This translates to a mere 0.4% drop in performance of SA-VIS when using annotations for only 1/5 of the images in the dataset. Empirically, SA-VIS shows strong improvements over the baseline on YouTube-VIS 2019/2021/2022 and Occluded VIS (OVIS) and an over 1% improvement in AP on the state-of-the-art in a limited annotations scenario.

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