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STEP: Segmenting and Tracking Every Pixel
Mark Weber · Jun Xie · Maxwell Collins · Yukun Zhu · Paul Voigtlaender · Hartwig Adam · Bradley Green · Andreas Geiger · Bastian Leibe · Daniel Cremers · Aljosa Osep · Laura Leal-Taixé · Liang-Chieh Chen

The task of assigning semantic classes and track identities to every pixel in a video is called video panoptic segmentation. Our work is the first that targets this task in a real-world setting requiring dense interpretation in both spatial and temporal domains. As the ground-truth for this task is difficult and expensive to obtain, existing datasets are either constructed synthetically or only sparsely annotated within short video clips. To overcome this, we introduce a new benchmark encompassing two datasets, KITTI-STEP, and MOTChallenge-STEP. The datasets contain long video sequences, providing challenging examples and a test-bed for studying long-term pixel-precise segmentation and tracking under real-world conditions. We further propose a novel evaluation metric Segmentation and Tracking Quality (STQ) that fairly balances semantic and tracking aspects of this task and is more appropriate for evaluating sequences of arbitrary length. Finally, we provide several baselines to evaluate the status of existing methods on this new challenging dataset. We have made our datasets, metric, benchmark servers, and baselines publicly available, and hope this will inspire future research.

Author Information

Mark Weber (Technical University Munich)
Jun Xie
Maxwell Collins (Google Inc.)
Yukun Zhu (University of Toronto)
Paul Voigtlaender (RWTH Aachen University)
Hartwig Adam (Google)
Bradley Green (Google AI)
Andreas Geiger (MPI Tübingen)
Bastian Leibe (RWTH Aachen University-)
Daniel Cremers (Technical University of Munich)
Aljosa Osep (TUM Munich)
Laura Leal-Taixé (TUM)
Liang-Chieh Chen (Google Inc.)

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