edge_detection 1.0.6

A flutter plugin to detect edges of objects, scan paper, detect corner, detect rectangle. It allows cropping of the detected object image and returns the path of the cropped image.

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(MyApp());
}

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

class _MyAppState extends State<MyApp> {
  String? _imagePath;

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

  Future<void> getImage() async {
    String? imagePath;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      imagePath = (await EdgeDetection.detectEdge);
      print("$imagePath");
    } 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 MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Center(
              child: ElevatedButton(
                onPressed: getImage,
                child: Text('Scan'),
              ),
            ),
            SizedBox(height: 20),
            Text('Cropped image path:'),
            Padding(
              padding: const EdgeInsets.only(top: 0, left: 0, right: 0),
              child: Text(
                '$_imagePath\n',
                style: TextStyle(fontSize: 10),
              ),
            ),
          ],
        ),
      ),
    );
  }
}