README.md

metadata

title: Fiber Checker
emoji: 🧵
colorFrom: yellow
colorTo: green
sdk: gradio
sdk_version: 6.28.0
python_version: '3.12'
app_file: app.py
pinned: false
license: apache-2.0
short_description: Are papyrus fibers visible on a traced scroll surface?
tags:
  - vesuvius-challenge
  - herculaneum
  - ct
  - papyrus
  - segmentation
  - mcp-server

Fiber Checker

Are papyrus fibers visible on a traced Herculaneum scroll surface? Pick any traced segment of the Vesuvius Challenge open data, or upload your own tifxyz mesh, and the Space renders the CT along the surface patch by patch and gives each patch a fiber evidence: near 1 where long, thin, parallel strands show, near 0.5 where the render looks no more fibrous than scrambled texture.

• Free, no key: the default judge is a small network that runs on this Space's CPU.
• Claude as a second opinion, with your own Anthropic key, used for that run only.
• A fiber map on the segment's own mesh grid (fiber.tif, the same shape as x.tif), a one-page report.html for prize entries, the clearest and weakest patches, and a self-check against built controls on every run.
• Fiber or not?: a game against the free judge, on renders of public scrolls on no prize list.
• Compare two traces, patch by patch.
• API and MCP server for scripts and agents.

The Progress Prize asks entrants to "show visually that papyrus fibers are visible on your output surface" (scrollprize.org/prizes): this is a way to measure that.

How the free judge was tested

It was preregistered, then tested once on two public scrolls it never saw (PHerc0500P2, 120 patches; PHerc0343P, 62 patches; 2.2 um scans at level 2). It told the sheet from the gap beside it on every patch (pixel measure 0.79 and 0.76), and the sheet from a 14-pixel tile shuffle, a size never trained on, on 98% and 92% of patches (pixel measure 0.53 and 0.57). A first round failed on the tile shuffle and is kept on record. Jump hints, fiber direction and best depth are untested ideas. A clear map says fibers show on and near the surface (each patch is rendered at the brightest depth within 5 voxels); it does not prove the trace stayed on one sheet. Everything it shows is model output about texture: it never reads or finds text.

Run it yourself

The command line tool is scripts/fibercheck/fibercheck.py in ChaseHendrick/Scrolls; the weights are this Space's weights/fibercheck-local.pt. See the How-to guides tab.

Scans and meshes: Vesuvius Challenge open data, CC BY-NC 4.0, read live from its bucket and never copied here. Code and weights: Apache 2.0. Made by Chase Hendrick.