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PraK V4 is an interactive video search system built for retrieval competitions. It introduces five advances over the prior release: (1) spatial conjunction of localized queries, letting users specify AND constraints across separate regions of interest, evaluated in a user study; (2) semi-automated user-interface adaptation for AVS tasks using online learning; (3) single-video browsing through a redesigned player and within-video querying; and (4) a parallelized backend for lower latency, (5) an updated keyframe layout strategy.

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PraK V4 at the Video Browser Showdown 2026

  • 会议论文

  • 发表日期：

    2026年

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  • Bastian Jäckl,
  • Benjamin Verner,
  • Michael Stroh,
  • Vojtěch Kloda,
  • Ladislav Nagy,
  • Oliver Deussen,
  • Daniel A. Keim,
  • Jakub Lokoč

摘要

PraK V4 is an interactive video search system built for retrieval competitions. It introduces five advances over the prior release: (1) spatial conjunction of localized queries, letting users specify AND constraints across separate regions of interest, evaluated in a user study; (2) semi-automated user-interface adaptation for AVS tasks using online learning; (3) single-video browsing through a redesigned player and within-video querying; and (4) a parallelized backend for lower latency, (5) an updated keyframe layout strategy.