opencv_dart 0.0.2+1

OpenCV4 bindings for Dart language

example/lib/main.dart

import 'dart:io';
import 'dart:typed_data';
import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:image/image.dart' as img;

import 'package:opencv_dart/opencv_dart.dart' as cv;

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String imagePath = r"";
  cv.Mat? image;
  ui.Image? uiImage;

  @override
  void initState() {
    super.initState();
  }

Future<ui.Image> convertImageToFlutterUi(img.Image image) async {
  if (image.format != img.Format.uint8 || image.numChannels != 4) {
    final cmd = img.Command()
      ..image(image)
      ..convert(format: img.Format.uint8, numChannels: 4);
    final rgba8 = await cmd.getImageThread();
    if (rgba8 != null) {
      image = rgba8;
    }
  }

  ui.ImmutableBuffer buffer = await
  ui.ImmutableBuffer.fromUint8List(image.toUint8List());

  ui.ImageDescriptor id = ui.ImageDescriptor.raw(
      buffer,
      height: image.height,
      width: image.width,
      pixelFormat: ui.PixelFormat.rgba8888);

  ui.Codec codec = await id.instantiateCodec(
      targetHeight: image.height,
      targetWidth: image.width);

  ui.FrameInfo fi = await codec.getNextFrame();
  ui.Image uiImage = fi.image;

  return uiImage;
}

  @override
  Widget build(BuildContext context) {
    const textStyle = TextStyle(fontSize: 25);
    const spacerSmall = SizedBox(height: 10);

    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Native Packages'),
        ),
        body: SingleChildScrollView(
          child: Container(
            alignment: Alignment.center,
            padding: const EdgeInsets.all(10),
            child: Row(
              children: [
                Image.file(File(imagePath)),
                spacerSmall,
                ElevatedButton(
                    onPressed: () async {
                      
                    },
                    child: const Text("Process")),
                image == null
                    ? Text("Image is null!")
                    : RawImage(
                        image: uiImage,
                      ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}