Publish TrianglePaintBench

Signed-off-by: Benjamin Chislett <chislett.ben@gmail.com>

README.md

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+---
+configs:
+- config_name: default
+  data_files:
+  - split: full
+    path: data/full-*
+  - split: curated_10
+    path: data/curated_10-*
+  - split: thumbnail_3
+    path: data/thumbnail_3-*
+task_categories:
+- image-to-image
+pretty_name: Triangle Reconstruction Benchmark
+size_categories:
+- n<1K
+---
+
+# Triangle Reconstruction Benchmark
+
+A small, diverse dataset curated manually from existing datasets and images found online, with item-level rights and provenance information.
+
+The purpose of this dataset is to evaluate the quality of algorithms for approximating images using sets of coloured triangles, such as [Genetic Algorithms](https://www.rogeralsing.com/2008/12/07/genetic-programming-evolution-of-mona-lisa/) or greedy ones such as [Geometrize](https://www.geometrize.co.uk/). 
+
+## Composition
+
+The benchmark set consists of 75 images, all rendered and post-processed to RGB PNG with a 1024-pixel longest edge. Aspect ratio is preserved. Exact source files are retained under `originals/`.
+
+Each image has a stable integer `index` from 1 to 75 for convenient reference (for example, “sample 23”), as well as a content-stable hexadecimal `id`. The same image retains its full-set index in every subset.
+
+There are three sets: 
+
+- `full`: the entire 75-image collection, 
+- `curated_10`: a 10-image development subset useful when iterating on new algorithms, and
+- `thumbnail_3`: three visually distinct headline images selected for thumbnails and quick comparisons. This includes the Mona Lisa, a target famously used by projects such as [EvoLisa](https://www.rogeralsing.com/2008/12/07/genetic-programming-evolution-of-mona-lisa/).
+
+## Rights and attribution
+
+This dataset contains images from multiple sources. No new or collective license is asserted over the source images; each image remains subject to its original license or rights status. Source, rights, and attribution information is provided at the item level. Canonical images have been resized and/or rasterized for evaluation.
+
+See `THIRD_PARTY_NOTICES.md`, `third_party_licenses/`, and the Parquet metadata columns. In particular, DIV2K is described by its publisher as academic-research-only, Kodak has no first-party license file in the acquired mirror, and logos may remain subject to trademark rights.
+
+## Loading
+
+```python
+from datasets import load_dataset
+
+dataset = load_dataset("benchislett/TrianglePaintBench")
+```
+
+When working from a local clone, use `load_dataset("path/to/triangle_reconstruction_hf")` instead.
+
+Integrity hashes for the original and canonical image files are in `checksums.sha256`.

THIRD_PARTY_NOTICES.md

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+# Third-party notices
+
+The canonical PNGs are resized and/or rasterized versions of the listed source images. Original rights remain in force.
+
+| Source | Items | Rights/license | Attribution |
+|---|---:|---|---|
+| CLIC2020 | 12 | [Unsplash License](https://unsplash.com/license); free commercial and non-commercial use; collection may not replicate a competing service | CLIC 2020 professional validation set; original photograph from Unsplash |
+| Color-Icon-Packs/svg-logos-color | 7 | [CC0 collection; underlying trademarks remain](https://github.com/gilbarbara/logos); open collection license; brand and trademark rights are separate | SVG Logos contributors; respective brand owners retain trademark rights |
+| DIV2K | 9 | [Academic research purposes only](https://data.vision.ee.ethz.ch/cvl/DIV2K/); research-only; copyright remains with original owners | DIV2K / NTIRE 2017 dataset; cite the dataset paper |
+| Generated-Samples/dinosaurs-and-fantasy-warriors | 8 | No source-image license; generated sample; AI-generated with OpenAI image generation on 2026-08-02 | AI-generated exploratory sample |
+| Kodak | 4 | [No first-party license supplied](https://r0k.us/graphics/kodak/); mirror reports Kodak released the images for unrestricted use | Kodak Lossless True Color Image Suite |
+| Museum-Paintings/artic | 2 | [CC0 / Public Domain](https://www.artic.edu/open-access/open-access-images); Art Institute of Chicago Open Access selection | The Art Institute of Chicago |
+| Museum-Paintings/cleveland | 2 | [CC0](https://www.clevelandart.org/open-access); Cleveland Museum of Art Open Access selection | Cleveland Museum of Art |
+| Museum-Paintings/met | 1 | [CC0 / Public Domain](https://www.metmuseum.org/about-the-met/policies-and-documents/open-access); Metropolitan Museum of Art Open Access selection | The Metropolitan Museum of Art |
+| NASA-Space-Photography/jwst-science-images | 2 | [NASA Media Usage Guidelines](https://www.nasa.gov/nasa-brand-center/images-and-media/); generally not subject to US copyright; item credits and third-party notices apply | NASA; retain item-level mission and contributor credits |
+| NASA-Space-Photography/solar-system-planets | 2 | [NASA Media Usage Guidelines](https://www.nasa.gov/nasa-brand-center/images-and-media/); generally not subject to US copyright; item credits and third-party notices apply | NASA; retain item-level mission and contributor credits |
+| Non-Game-Fantasy/morevna-project | 1 | [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/); Morevna Demo visual | Morevna Project; resized from the Morevna Demo |
+| Open-Fantasy-Art/wesnoth | 4 | [GPL-2.0-or-later and/or CC BY-SA 4.0; see upstream notices](https://wiki.wesnoth.org/Wesnoth:Copyrights); open-licensed; exact asset terms follow the retained upstream notices | Battle for Wesnoth contributors |
+| Open-Nature-Photography/highsmith-landscapes | 3 | [No known restrictions](https://www.loc.gov/pictures/collection/highsm/); Carol M. Highsmith collection donated copyright-free | Carol M. Highsmith, Library of Congress |
+| Open-Nature-Photography/inaturalist-open-nature | 1 | [CC BY](https://creativecommons.org/licenses/by/4.0/); iNaturalist item-level photo license | (c) E. A., some rights reserved (CC BY) |
+| Open-Nature-Photography/inaturalist-open-nature | 1 | [CC0](https://creativecommons.org/publicdomain/zero/1.0/); iNaturalist item-level photo license | no rights reserved |
+| Required-Artworks/public-domain-masterpieces | 1 | [Public Domain (explicitly stated by USGS)](https://www.usgs.gov/media/images/earth-image-space); Public Domain (explicitly stated by USGS) | NASA |
+| Required-Artworks/public-domain-masterpieces | 1 | [Public Domain Mark 1.0; digital enhancements released into the public domain worldwide by Dcoetzee](https://commons.wikimedia.org/wiki/File:Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg); Public Domain Mark 1.0; digital enhancements released into the public domain worldwide by Dcoetzee | Leonardo da Vinci; Dcoetzee |
+| SVG-Bench/svg-emoji | 4 | [Apache-2.0](https://www.apache.org/licenses/LICENSE-2.0); Noto Emoji license | Google Noto Emoji contributors |
+| SVG-Bench/svg-emoji | 5 | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/); Twemoji graphics license | Twitter Twemoji contributors |
+| Vector-Packs/flag-icons | 5 | [MIT](https://github.com/lipis/flag-icons/blob/main/LICENSE); open pack license; national flag rules may also apply | flag-icons contributors |