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Docs: add an AlbumentationsX tutorial for custom DINO views - #2048

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ternaus wants to merge 3 commits into
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ternaus:codex/docs-ax-dino-multiview

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@ternaus

@ternaus ternaus commented Aug 29, 2026

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Closes #2047

Description

  • My change is breaking

Adds a Sphinx Gallery tutorial for customizing DINO crop and photometric policies with optional AlbumentationsX. It uses Lightly's current MultiViewTransform to produce two global and six local tensors, then shows dataset integration, policy serialization, and seeded tracing of sampled transforms. A restored policy and the same invocation seed reproduce the diagnostic view exactly.

AlbumentationsX stays outside Lightly's runtime dependencies. The installation instructions include the Matplotlib extra used by the tutorial and document Python 3.10+, the user-selected PyTorch build, and AlbumentationsX's AGPL-3.0-only license.

Tests

  • My change is covered by existing tests.
  • My change needs new tests.
  • I have added/adapted the tests accordingly.
  • I have manually tested the change.

Executed the complete tutorial with albumentationsx==2.4.3; verified tensor and sampled-parameter reproduction for all three restored policies, fresh training samples, and an eight-view LightlyDataset batch. The focused transform tests passed (3 tests), along with full-tree Ruff checks, all hooks on the PR files, and Sphinx documentation and tutorial execution.

Repository-wide pre-commit still reports the existing codespell finding in unchanged lightly/loss/frossl_loss.py:90 (fro). The docs build also has existing cross-reference warnings outside this tutorial.

Documentation

  • I have added docstrings to all public functions/methods.
  • My change requires a change to the documentation (.rst files).
  • I have updated the documentation accordingly.
  • The autodocs update the documentation accordingly.

The generated tutorial and PDF preview were inspected visually. OpenCV and torchvision can differ pixel-wise; the tutorial recommends evaluating policy changes on the intended downstream task.

Adds a standalone Sphinx Gallery tutorial for customizing DINO global and local views with optional AlbumentationsX. The tutorial uses MultiViewTransform, supports configurable crop and photometric policies, serializes policies with A.to_dict(), and reproduces diagnostic views with run_with_trace(). Adds the tutorial to the documentation index without changing runtime dependencies or existing documentation.

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  • docs/source/tutorials_source/package/tutorial_custom_dino_augmentations.py

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📝 Walkthrough

Walkthrough

The documentation adds a custom DINO augmentation tutorial to the navigation. The tutorial demonstrates configurable policies, multi-view execution, policy serialization, and seeded diagnostic reproduction with sampled parameters.

Changes

DINO augmentation tutorial

Layer / File(s) Summary
Define configurable DINO view policies
docs/source/tutorials_source/package/tutorial_custom_dino_augmentations.py
Documents the optional installation, defines global and local policies, and adapts Albumentations output for Lightly.
Execute and serialize generated views
docs/source/tutorials_source/package/tutorial_custom_dino_augmentations.py, docs/source/index.rst
Creates two global and six local views, validates and visualizes them, documents LightlyDataset integration, serializes policies, and adds the tutorial to the navigation.
Reproduce diagnostic views
docs/source/tutorials_source/package/tutorial_custom_dino_augmentations.py
Runs traced policies with fixed seeds, prints sampled parameters, verifies restored-policy output with torch.testing.assert_close, and documents diagnostic artifacts.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 347a7

The tutorial’s seeded diagnostic and policy-serialization examples are in place, with no current actionable merge risk identified.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 75.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 1 files. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Linked Issues check ✅ Passed The tutorial satisfies the coding requirements in [#2047]. It defines separate global and local AlbumentationsX policies with DINO-specific blur and solarization probabilities. It exposes crop ratio, …
Out of Scope Changes check ✅ Passed The changes remain within [#2047]. They add the requested standalone tutorial and its documentation toctree entry. The tutorial documents the optional AlbumentationsX installation boundary and does no…
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title clearly and concisely describes the main documentation change: adding an AlbumentationsX tutorial for custom DINO views.
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Document role-specific global and local view policies with the current MultiViewTransform contract. Show independent repeated local sampling and policy serialization.
@ternaus
ternaus force-pushed the codex/docs-ax-dino-multiview branch from 4d2a41e to a5ad712 Compare August 29, 2026 11:47
@gabrielfruet

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Hey, is this ready to be reviewed?

@ternaus
ternaus marked this pull request as ready for review September 11, 2026 05:21
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Actionable comments posted: 1

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Inline comments:
In `@docs/source/tutorials_source/package/tutorial_custom_dino_augmentations.py`:
- Line 196: Add a separate diagnostic example near the transform invocation that
calls each A.Compose policy via run_with_trace(image=..., invocation_seed=...),
exposing the applied operations for inspection and reproducibility. Leave
MultiViewTransform and its existing views = transform(image) training path
unchanged.

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  • docs/source/index.rst
  • docs/source/tutorials_source/package/tutorial_custom_dino_augmentations.py

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Trace each view role with an explicit invocation seed and reproduce a diagnostic tensor from its serialized policy. Include the required plotting extra and render tutorial explanations as prose.
@ternaus

ternaus commented Sep 11, 2026

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Yes, @gabrielfruet, this is ready for review now. I added the missing seeded diagnostics and verified the complete tutorial, policy reproduction, and Lightly dataset integration.

The focused tests and docs build pass. The GitHub Actions runs still need maintainer approval.

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Tutorial proposal: customize and inspect DINO views with AlbumentationsX

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