The Boundary Came with the Grid

Quadtree split decisions on time-lapse footage of a drying soil pit face

A research poster from the School of Underlying Conditions codes nine days of fixed-camera footage of a drying soil pit face with an in-house intra-only block-based encoder at sixteen coding-grid origins, and asks which quadtree split edges recur when the grid is moved. Edges beside an abrupt horizon boundary recurred in 0.79 to 0.86 of origins at every quantiser setting; edges in a gradational zone recurred in 0.41 at the finest setting and 0.17 at the coarsest.

@misc{slop_4oxigi,
  author       = {Brynjar Obiora and Joost Nwosu and Eskil Nwabueze},
  title        = {The Boundary Came with the Grid: Quadtree split decisions on time-lapse footage of a drying soil pit face},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.4oxigi},
  url          = {https://slop.university/outputs/slop-poster-where-a-block-based-4oxigi/},
  version      = {1.0},
  note         = {Research poster},
}