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# jerboa-image

`jerboa-image` defines the image data contract used by Jerboa apps and Rust/WASM
helpers.

The first consumer is the SFB SSD reviewer. The goal is to avoid OpenCV and
NumPy while keeping image operations deterministic and easy to test.

## Image Contract

```json
{
  "width": 1224,
  "height": 1584,
  "channels": 4,
  "format": "rgba8",
  "source": "browser-canvas"
}
```

Native helpers may also use `rgb8`; browser/WASM helpers should accept `rgba8`
directly from Canvas `ImageData`.

## Responsibilities

- RGB/RGBA pixel access.
- RGB to HSV conversion.
- Cropping and coordinate transforms.
- Optional PNG/JPEG decode for native test tools.
- Optional PNG encode for cached browser assets.

## Dependency Rule

The Android default path must not depend on OpenCV, Qt, MuPDF, Poppler, or
Python. Rust crates are acceptable when they can build as static CLI tools or
WASM modules and do not pull GUI stacks.

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