# Image Grid Splitter

> Slice a photo into numbered tiles without losing edge pixels. Split one image into a row-and-column grid and download every tile as a PNG in one ZIP. Uneven dimensions are distributed across the tiles so the complete photo can be reconstructed.

Part of usefulweb.app (https://usefulweb.app/). Results are deterministic calculations from the inputs and the listed assumptions; the API returns exactly what the web page shows.

## Use it
- Human interface: https://luminaimagesplitter.usefulweb.app/ (interactive tool at https://luminaimagesplitter.usefulweb.app/tool)
- JSON API: POST https://luminaimagesplitter.usefulweb.app/api/v1/calculate with a JSON object of inputs (schema: https://luminaimagesplitter.usefulweb.app/api/v1/tool)
- OpenAPI: https://luminaimagesplitter.usefulweb.app/openapi.json
- MCP (Streamable HTTP): https://luminaimagesplitter.usefulweb.app/mcp - tool `lumina_image_splitter`

## Inputs
- images (file, required): Single photo (PNG, JPEG, WebP or GIF) - Up to 24 PNG, JPEG, WebP or GIF images (first frame). ZIP order is preserved. Decoded total: 32 MP; each photo: 16 MP.
- rows (integer): Rows
- columns (integer): Columns

## Method
- The source is auto-oriented. Integer boundaries use floor(index × size / count), ensuring no gaps, overlaps or missing edge pixels.
- At most 64 nonempty tiles; original decoded photo limited to 16 MP. ZIP names encode row and column.
- Outputs are PNGs with original EXIF/GPS removed. The ZIP includes a JSON manifest with the exact tile coordinates.