edge_detection 1.0.1

This is a flutter plugin to detect edges of objects. You can use this plugin to scan paper, detect corner, detect rectangle. The plugin also allows for cropping of the image of the detected object. Th [...]

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:edge_detection/edge_detection.dart';

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _imagePath = 'Unknown';

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

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String imagePath;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      imagePath = await EdgeDetection.detectEdge;
    } on PlatformException {
      imagePath = 'Failed to get cropped image path.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _imagePath = imagePath;
    });
  }

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: const Text('Plugin example app'),
        ),
        body: new Center(
          child: new Text('Cropped image path: $_imagePath\n'),
        ),
      ),
    );
  }
}