We address semi-supervised video object segmentation, the task of automatically generating accurate and consistent pixel masks for objects in a video sequence, given the first-frame ground truth annotations. Towards this goal, we present the PReMVOS algorithm (Proposal-generation, Refinement and Merging for Video Object Segmentation). Our method separates this problem into two steps, first generating a set of accurate object segmentation mask proposals for each video frame and then selecting and merging these proposals into accurate and temporally consistent pixel-wise object tracks over a video sequence. We develop a new approach for solving each of these sub-problems and combine these into a method which is designed to specifically tackle the difficult challenges involved with segmenting multiple objects across a video sequence. Our approach surpasses all previous state-of-the-art results on the DAVIS 2017 video object segmentation benchmark with a J & F mean score of 71.6 on the test-dev dataset, and achieves first place in the DAVIS 2018 Video Object Segmentation Challenge.

我们提出了一种名为PReMVOS的半监督视频对象分割算法，它将问题分为生成准确的对象分割掩码提案和选择和合并这些提案成为准确且时间上连续的像素级对象轨迹，并在同时处理跨视频序列分割多个对象的困难问题方面取得了最先进的结果。

视频物体分割的提议生成、精化和合并