# Greeting photo and sticker assets

## Photographs

The 48 photographs in `backgrounds/` are made available under CC0 1.0. Each record in `catalog.json` contains the photographer/uploader name, Wikimedia Commons source page, image SHA-1, original image URL, thumbnail URL, and image-specific CC0 license URL. The Wikimedia Commons image metadata was checked on 20 September 2026; raw API responses are retained in `raw/q-*.json`.

CC0 allows commercial reuse, modification, and redistribution without a copyright attribution requirement. Photographer/source credits are nevertheless preserved and should remain available through the site's photo credits. The old Unsplash photographs were sourced from their Commons CC0 records, not under the current Unsplash license. The catalog never treats Commons's generic site-footer CC0 notice as the image license.

CC0 license: https://creativecommons.org/publicdomain/zero/1.0/

The photos were visually reviewed as contact sheets, then converted to WebP at quality 83 with a maximum side length of 1,600 pixels. `review/FINAL-*.jpg` are the final contact sheets. No identifiable people, visible logos, artwork reproductions, or landscape photographs were selected. SHA-1 checks confirm no original-image duplicates internally or against the existing 500-photo catalog; final WebP SHA-256 values are also unique.

## Transparent PNG stickers

The six 768 × 768 PNG stickers are unaltered Noto Emoji artwork rasterized from the official Google repository's SVG resources. Rasterization is the only modification; the artwork has not been redrawn. `stickers.json` records exact upstream file URLs and commit hashes.

Copyright 2013 Google, Inc. All Rights Reserved.

Licensed under Apache License 2.0. This is the license for the SVG image resources; Noto's separate font files use the SIL Open Font License and were not used.

- Official source: https://github.com/googlefonts/noto-emoji
- Upstream commit: `06121655d0e82f9cae6e7ba6feed4fa6fdbfc2a4`
- Image license: https://github.com/googlefonts/noto-emoji/blob/06121655d0e82f9cae6e7ba6feed4fa6fdbfc2a4/2D/svg/LICENSE
- License text: `stickers/LICENSE-APACHE-2.0.txt`
- Upstream notice: `stickers/NOTO-NOTICE.txt`

When distributing the stickers, retain the Apache 2.0 license and copyright notice, and retain the modification note stating that the source SVGs were rasterized as transparent PNGs. A suitable product credits entry is: “Adesivi Noto Emoji © Google, licenza Apache 2.0. Convertiti da SVG a PNG.” Link it to the retained notice/license and official project. No ShareAlike license is used by these assets.

## Integration

Copy `backgrounds/*.webp` into the site's `public/backgrounds/` and merge `catalog.json` with its existing backgrounds catalog. Categories are `Flowers`, `Animals`, `Coffee`, `Celebration`, with lowercase `group` values (`flowers`, `animals`, `coffee`, `celebration`).

Copy `stickers/*.png`, `stickers/LICENSE-APACHE-2.0.txt`, and `stickers/NOTO-NOTICE.txt` into `public/stickers/`; use `stickers.json` as the sticker manifest. The SVGs and source README are retained only for provenance and do not need to be deployed.

`validation.json` contains asset counts, byte totals, uniqueness results, and maximum dimensions. Raw candidates, download scripts, and intermediate review sheets are curation work products and should not be deployed.