image_white_background

Composite a transparent image onto a solid (white) background. Useful before sending images to OCR / vision models, which often read more reliably against an opaque background than a transparent one.

Install

dependencies:
  image_white_background: ^0.1.0

Usage

import 'package:image_white_background/image_white_background.dart';

// Padding mode: image + a white border on every side.
final padded = await ImageWhiteBackground.apply(
  pngBytes,
  padding: const EdgeInsets.all(24),
);

// Fixed-canvas mode: center the image on a white canvas of an exact size.
final framed = await ImageWhiteBackground.apply(
  pngBytes,
  canvasSize: const Size(1024, 1024),
);

// Any background colour you like.
final onBlack = await ImageWhiteBackground.apply(
  pngBytes,
  background: const Color(0xFF000000),
);

apply returns PNG bytes (Uint8List) you can upload, display with Image.memory, or hand to a vision API.

License

MIT