from Hacker News

AllTracker: Efficient Dense Point Tracking at High Resolution

by lnyan on 6/21/25, 5:09 PM with 10 comments

• by upghost on 6/21/25, 9:36 PM

  > The utility of optical flow (i.e., the instantaneous velocity of pixels [16]) toward this goal has long been obvious, yet it has remained challenging to upgrade flows into long-range tracks.

  This sentence from the paper makes me feel a little bad that I don't understand why this goal is obvious. I am not tracking why we are tracking pixels.

  Is this basically a competing technology with YOLO[1] or SAM[2]?

  [1]: https://en.m.wikipedia.org/wiki/You_Only_Look_Once

  [2]: https://ai.meta.com/sam2/

  Edit: added annotations, should've done that initially

• by jcims on 6/21/25, 11:38 PM

  Object segmentation and tracking is such a natural and 'automatic' part of our visual perception that it's difficult to intuit how challenging it is to do with software.

• by jauntywundrkind on 6/21/25, 6:50 PM

  Crazy slick results. Nicely done team!