Esa Kataja
efc920fdc5
Records the outcome of the design review that reworked the original handoff notes: - CONTEXT.md — ubiquitous language for the slicer (slice, cut, discard, content rectangle, trim, song scale, bundle, project, jump source) - docs/adr/0001 — the slicer owns all image processing and the bundle is the only channel to noteman; noteman's sharp pipeline goes away - pyproject renamed to noteman-slicer - .gitignore keeps scores and bundles out of the repo (copyright, size)
noteman-slicer
Turns a score PDF into the ordered slice images noteman consumes, plus the navigation markers that sit on them.
A slice is one system — one full line of music across all voices, typically 4–12 bars with lyrics intact. noteman displays them as a continuous vertical scroll, so the slicer's job is to cut a printed page into systems, clean them up enough to read on a tablet, and tag them with the score's navigation symbols.
Status: design only. No code yet. The design is settled; see below.
How it works
Open a PDF, and the tool proposes cuts between systems, a skew correction, and a content rectangle. You correct all of it — source quality varies too much for unattended processing, so detection is an accelerator that nothing depends on being right. You mark the header and footer regions discarded, set black and white points until the paper disappears and the notes go solid, place the rehearsal letters and jump markers, fill in the title block, and export.
Out comes one zip: the slices in order, their markers, the original PDF, and the song metadata. That bundle is the only channel to noteman — there's no API between the two tools.
Erasing previous-owner pencil marks, chord letters and breath marks stays in GIMP. That's the irreducible manual part, and GIMP with a stylus is already good at it.
Installation
Not yet installable. When it is:
uv tool install --editable .
That puts a noteman-slicer command on PATH which runs from any directory — no venv to
activate. Dependencies (PyMuPDF, PySide6, OpenCV, numpy) are all wheels; nothing
needs a system package.
Documentation
| CONTEXT.md | Glossary. What a slice, cut, discard, bundle and song scale actually mean here. Start here. |
| slicer-handoff.md | The design: pipeline, geometry model, detection, bundle format, and what noteman has to change. |
| docs/adr/0001 | Why the slicer owns all image processing and the bundle is the only channel. |
| BACKLOG.md | Deliberately deferred, with the reasoning that got it deferred. |