portrait_validator_and_enhancer 1.0.2

A comprehensive Flutter package for portrait quality validation, face analysis, and image enhancement.

example/lib/main.dart

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:portrait_validator_and_enhancer/portrait_validator_and_enhancer.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Portrait Enhancer Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

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

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final _qualityGate = ImageQualityGateService();
  final _enhancer = ImageEnhancementService();
  final _recenter = FaceRecenterService();
  final _bgRemoval = BackgroundRemovalService();
  final _picker = ImagePicker();

  bool _isProcessing = false;
  String _status = 'Select a photo to begin';
  File? _originalImage;
  File? _processedImage;

  @override
  void dispose() {
    _qualityGate.dispose();
    _recenter.dispose();
    _bgRemoval.dispose();
    super.dispose();
  }

  Future<void> _pickAndProcess() async {
    final XFile? image = await _picker.pickImage(source: ImageSource.gallery);
    if (image == null) return;

    final File file = File(image.path);
    setState(() {
      _originalImage = file;
      _processedImage = null;
      _isProcessing = true;
      _status = 'Validating portrait quality...';
    });

    try {
      // 1. Validate
      final validation = await _qualityGate.validate(file);
      if (!validation.isAccepted) {
        setState(() {
          _status = 'Validation Failed:\n${validation.rejectionReason}';
          _isProcessing = false;
        });
        return;
      }

      // 2. Recenter & Crop
      setState(() => _status = 'Recentering and cropping...');
      final cropped = await _recenter.recenterFace(file);

      // 3. Enhance
      setState(() => _status = 'Applying professional enhancement...');
      final enhanced = await _enhancer.enhanceImage(cropped);

      // 4. Remove Background (Optional)
      setState(() => _status = 'Removing background...');
      final finalImage = await _bgRemoval.removeBackground(enhanced);

      setState(() {
        _processedImage = finalImage;
        _status = 'Processing complete!';
        _isProcessing = false;
      });
    } catch (e) {
      setState(() {
        _status = 'Error: $e';
        _isProcessing = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Portrait Enhancer'),
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(24),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              if (_isProcessing) ...[
                const CircularProgressIndicator(),
                const SizedBox(height: 20),
                Text(_status, textAlign: TextAlign.center),
              ] else ...[
                if (_processedImage != null) ...[
                  const Text('Processed Result', style: TextStyle(fontWeight: FontWeight.bold)),
                  const SizedBox(height: 10),
                  Image.file(_processedImage!),
                ] else if (_originalImage != null) ...[
                  const Text('Original Image', style: TextStyle(fontWeight: FontWeight.bold)),
                  const SizedBox(height: 10),
                  Image.file(_originalImage!),
                ] else
                  const Icon(Icons.face, size: 100, color: Colors.grey),
                const SizedBox(height: 20),
                Text(_status, textAlign: TextAlign.center),
                const SizedBox(height: 40),
                ElevatedButton.icon(
                  onPressed: _pickAndProcess,
                  icon: const Icon(Icons.photo_library),
                  label: const Text('Pick Image & Process'),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }
}