ajout correction de distotion d'image
This commit is contained in:
@@ -16,6 +16,7 @@ import '../../data/repositories/session_repository.dart';
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import '../../services/target_detection_service.dart';
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import '../../services/target_detection_service.dart';
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import '../../services/score_calculator_service.dart';
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import '../../services/score_calculator_service.dart';
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import '../../services/grouping_analyzer_service.dart';
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import '../../services/grouping_analyzer_service.dart';
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import '../../services/distortion_correction_service.dart';
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enum AnalysisState { initial, loading, success, error }
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enum AnalysisState { initial, loading, success, error }
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@@ -24,6 +25,7 @@ class AnalysisProvider extends ChangeNotifier {
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final ScoreCalculatorService _scoreCalculatorService;
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final ScoreCalculatorService _scoreCalculatorService;
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final GroupingAnalyzerService _groupingAnalyzerService;
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final GroupingAnalyzerService _groupingAnalyzerService;
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final SessionRepository _sessionRepository;
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final SessionRepository _sessionRepository;
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final DistortionCorrectionService _distortionService;
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final Uuid _uuid = const Uuid();
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final Uuid _uuid = const Uuid();
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AnalysisProvider({
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AnalysisProvider({
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@@ -31,10 +33,12 @@ class AnalysisProvider extends ChangeNotifier {
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required ScoreCalculatorService scoreCalculatorService,
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required ScoreCalculatorService scoreCalculatorService,
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required GroupingAnalyzerService groupingAnalyzerService,
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required GroupingAnalyzerService groupingAnalyzerService,
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required SessionRepository sessionRepository,
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required SessionRepository sessionRepository,
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DistortionCorrectionService? distortionService,
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}) : _detectionService = detectionService,
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}) : _detectionService = detectionService,
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_scoreCalculatorService = scoreCalculatorService,
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_scoreCalculatorService = scoreCalculatorService,
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_groupingAnalyzerService = groupingAnalyzerService,
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_groupingAnalyzerService = groupingAnalyzerService,
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_sessionRepository = sessionRepository;
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_sessionRepository = sessionRepository,
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_distortionService = distortionService ?? DistortionCorrectionService();
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AnalysisState _state = AnalysisState.initial;
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AnalysisState _state = AnalysisState.initial;
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String? _errorMessage;
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String? _errorMessage;
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@@ -62,6 +66,11 @@ class AnalysisProvider extends ChangeNotifier {
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List<Shot> _referenceImpacts = [];
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List<Shot> _referenceImpacts = [];
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ImpactCharacteristics? _learnedCharacteristics;
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ImpactCharacteristics? _learnedCharacteristics;
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// Distortion correction
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bool _distortionCorrectionEnabled = false;
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DistortionParameters? _distortionParams;
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String? _correctedImagePath;
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// Getters
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// Getters
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AnalysisState get state => _state;
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AnalysisState get state => _state;
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String? get errorMessage => _errorMessage;
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String? get errorMessage => _errorMessage;
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@@ -83,6 +92,16 @@ class AnalysisProvider extends ChangeNotifier {
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ImpactCharacteristics? get learnedCharacteristics => _learnedCharacteristics;
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ImpactCharacteristics? get learnedCharacteristics => _learnedCharacteristics;
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bool get hasLearnedCharacteristics => _learnedCharacteristics != null;
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bool get hasLearnedCharacteristics => _learnedCharacteristics != null;
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// Distortion correction getters
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bool get distortionCorrectionEnabled => _distortionCorrectionEnabled;
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DistortionParameters? get distortionParams => _distortionParams;
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String? get correctedImagePath => _correctedImagePath;
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bool get hasDistortion => _distortionParams?.needsCorrection ?? false;
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/// Retourne le chemin de l'image à afficher (corrigée si activée, originale sinon)
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String? get displayImagePath => _distortionCorrectionEnabled && _correctedImagePath != null
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? _correctedImagePath
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: _imagePath;
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/// Analyze an image
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/// Analyze an image
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Future<void> analyzeImage(String imagePath, TargetType targetType) async {
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Future<void> analyzeImage(String imagePath, TargetType targetType) async {
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_state = AnalysisState.loading;
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_state = AnalysisState.loading;
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@@ -346,6 +365,46 @@ class AnalysisProvider extends ChangeNotifier {
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notifyListeners();
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notifyListeners();
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}
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}
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/// Calcule les paramètres de distorsion basés sur la calibration actuelle
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void calculateDistortion() {
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_distortionParams = _distortionService.calculateDistortionFromCalibration(
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targetCenterX: _targetCenterX,
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targetCenterY: _targetCenterY,
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targetRadius: _targetRadius,
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imageAspectRatio: _imageAspectRatio,
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);
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notifyListeners();
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}
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/// Applique la correction de distorsion à l'image
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/// Crée une nouvelle image corrigée et la sauvegarde
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Future<void> applyDistortionCorrection() async {
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if (_imagePath == null || _distortionParams == null) return;
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try {
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_correctedImagePath = await _distortionService.applyCorrection(
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_imagePath!,
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_distortionParams!,
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);
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_distortionCorrectionEnabled = true;
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notifyListeners();
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} catch (e) {
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_errorMessage = 'Erreur lors de la correction: $e';
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notifyListeners();
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}
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}
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/// Active ou désactive l'affichage de l'image corrigée
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void setDistortionCorrectionEnabled(bool enabled) {
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if (enabled && _correctedImagePath == null && _distortionParams != null) {
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// Si on active mais pas encore d'image corrigée, la créer
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applyDistortionCorrection();
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} else {
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_distortionCorrectionEnabled = enabled;
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notifyListeners();
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}
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}
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int _calculateShotScore(double x, double y) {
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int _calculateShotScore(double x, double y) {
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if (_targetType == TargetType.concentric) {
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if (_targetType == TargetType.concentric) {
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return _scoreCalculatorService.calculateConcentricScore(
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return _scoreCalculatorService.calculateConcentricScore(
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@@ -433,6 +492,9 @@ class AnalysisProvider extends ChangeNotifier {
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_groupingResult = null;
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_groupingResult = null;
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_referenceImpacts = [];
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_referenceImpacts = [];
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_learnedCharacteristics = null;
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_learnedCharacteristics = null;
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_distortionCorrectionEnabled = false;
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_distortionParams = null;
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_correctedImagePath = null;
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notifyListeners();
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notifyListeners();
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}
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}
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}
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}
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@@ -316,6 +316,61 @@ class _AnalysisScreenContentState extends State<_AnalysisScreenContent> {
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),
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),
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],
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],
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),
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),
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const Divider(color: Colors.white24, height: 16),
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// Distortion correction row
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Row(
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children: [
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const Icon(Icons.lens_blur, color: Colors.white, size: 20),
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const SizedBox(width: 8),
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const Expanded(
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child: Text('Correction distorsion:', style: TextStyle(color: Colors.white)),
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),
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if (provider.distortionParams == null)
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ElevatedButton.icon(
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onPressed: () {
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provider.calculateDistortion();
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},
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icon: const Icon(Icons.calculate, size: 16),
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label: const Text('Calculer'),
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.blueGrey,
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
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),
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)
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else ...[
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if (provider.correctedImagePath == null)
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ElevatedButton.icon(
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onPressed: () {
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provider.applyDistortionCorrection();
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},
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icon: const Icon(Icons.auto_fix_high, size: 16),
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label: const Text('Appliquer'),
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style: ElevatedButton.styleFrom(
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backgroundColor: AppTheme.primaryColor,
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
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),
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)
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else
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Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Icon(Icons.check_circle, color: Colors.green, size: 16),
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const SizedBox(width: 4),
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const Text('Corrigée', style: TextStyle(color: Colors.green, fontSize: 12)),
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const SizedBox(width: 8),
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Switch(
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value: provider.distortionCorrectionEnabled,
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onChanged: (value) => provider.setDistortionCorrectionEnabled(value),
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activeTrackColor: AppTheme.primaryColor.withValues(alpha: 0.5),
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activeThumbColor: AppTheme.primaryColor,
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),
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],
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),
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],
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],
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),
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],
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],
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),
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),
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),
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),
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@@ -465,7 +520,7 @@ class _AnalysisScreenContentState extends State<_AnalysisScreenContent> {
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fit: StackFit.expand,
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fit: StackFit.expand,
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children: [
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children: [
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Image.file(
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Image.file(
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File(provider.imagePath!),
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File(provider.displayImagePath!),
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fit: BoxFit.fill,
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fit: BoxFit.fill,
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key: _imageKey,
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key: _imageKey,
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),
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),
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@@ -534,7 +589,7 @@ class _AnalysisScreenContentState extends State<_AnalysisScreenContent> {
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fit: StackFit.expand,
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fit: StackFit.expand,
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children: [
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children: [
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Image.file(
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Image.file(
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File(provider.imagePath!),
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File(provider.displayImagePath!),
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fit: BoxFit.fill,
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fit: BoxFit.fill,
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key: _imageKey,
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key: _imageKey,
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),
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),
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423
lib/services/distortion_correction_service.dart
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423
lib/services/distortion_correction_service.dart
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@@ -0,0 +1,423 @@
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/// Service de correction de distorsion d'objectif.
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///
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/// Utilise la calibration des cercles de la cible pour calculer et appliquer
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/// une transformation qui corrige la distorsion de l'objectif. L'image est
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/// transformée pour que les cercles calibrés deviennent parfaitement circulaires.
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library;
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import 'dart:io';
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import 'dart:math' as math;
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import 'package:image/image.dart' as img;
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import 'package:path_provider/path_provider.dart';
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/// Paramètres de distorsion calculés à partir de la calibration
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class DistortionParameters {
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/// Ratio d'aplatissement horizontal (1.0 = pas de correction)
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final double scaleX;
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/// Ratio d'aplatissement vertical (1.0 = pas de correction)
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final double scaleY;
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/// Angle de rotation de l'axe principal (en radians)
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final double rotation;
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/// Centre de la distorsion en coordonnées normalisées (0-1)
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final double centerX;
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final double centerY;
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/// Ratio de circularité détecté (1.0 = cercle parfait)
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final double circularityRatio;
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const DistortionParameters({
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required this.scaleX,
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required this.scaleY,
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required this.rotation,
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required this.centerX,
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required this.centerY,
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required this.circularityRatio,
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});
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/// Paramètres par défaut (pas de correction)
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static const identity = DistortionParameters(
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scaleX: 1.0,
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scaleY: 1.0,
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rotation: 0.0,
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centerX: 0.5,
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centerY: 0.5,
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circularityRatio: 1.0,
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);
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/// La correction est-elle nécessaire ?
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bool get needsCorrection => circularityRatio < 0.95;
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@override
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String toString() {
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return 'DistortionParameters(scaleX: ${scaleX.toStringAsFixed(3)}, '
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'scaleY: ${scaleY.toStringAsFixed(3)}, '
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'rotation: ${(rotation * 180 / math.pi).toStringAsFixed(1)}°, '
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'circularity: ${(circularityRatio * 100).toStringAsFixed(1)}%)';
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}
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}
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/// Service pour détecter et corriger la distorsion d'objectif
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class DistortionCorrectionService {
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/// Calcule les paramètres de distorsion à partir de la calibration des cercles
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///
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/// [targetCenterX], [targetCenterY] : Centre de la cible calibré (0-1)
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/// [targetRadius] : Rayon de la cible calibré
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/// [imageAspectRatio] : Ratio largeur/hauteur de l'image
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///
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/// Cette méthode analyse la forme attendue (cercle) vs la forme observée
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/// pour déterminer les paramètres de correction.
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DistortionParameters calculateDistortionFromCalibration({
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required double targetCenterX,
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required double targetCenterY,
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required double targetRadius,
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required double imageAspectRatio,
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}) {
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// En théorie, si la cible est un cercle parfait et que l'utilisateur
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// a calibré les anneaux pour qu'ils correspondent à ce qu'il voit,
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// on peut déduire la distorsion.
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// Pour l'instant, on utilise une approche simplifiée basée sur l'aspect ratio
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// et la position du centre par rapport au centre de l'image.
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// Calcul de l'excentricité basée sur la position du centre
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final offsetX = targetCenterX - 0.5;
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final offsetY = targetCenterY - 0.5;
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final offsetDistance = math.sqrt(offsetX * offsetX + offsetY * offsetY);
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// Plus le centre est éloigné du centre de l'image, plus la distorsion est probable
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// Estimation simplifiée de la distorsion radiale
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final distortionFactor = 1.0 + offsetDistance * 0.2;
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// Calculer l'angle de l'axe principal de déformation
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final angle = math.atan2(offsetY, offsetX);
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// Si l'image n'est pas carrée, tenir compte de l'aspect ratio
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double scaleX = 1.0;
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double scaleY = 1.0;
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if (imageAspectRatio > 1.0) {
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// Image plus large que haute
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scaleY = distortionFactor;
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} else if (imageAspectRatio < 1.0) {
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// Image plus haute que large
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scaleX = distortionFactor;
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}
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final circularityRatio = 1.0 / distortionFactor;
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return DistortionParameters(
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scaleX: scaleX,
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scaleY: scaleY,
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rotation: angle,
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centerX: targetCenterX,
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centerY: targetCenterY,
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circularityRatio: circularityRatio,
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);
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}
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/// Calcule les paramètres de distorsion en comparant un cercle théorique
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/// avec les points de calibration fournis par l'utilisateur
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///
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/// [calibrationPoints] : Points sur l'ellipse visible (coordonnées 0-1)
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/// [expectedRadius] : Rayon du cercle théorique
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/// [centerX], [centerY] : Centre du cercle théorique
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DistortionParameters calculateDistortionFromPoints({
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required List<({double x, double y})> calibrationPoints,
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required double expectedRadius,
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required double centerX,
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required double centerY,
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}) {
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if (calibrationPoints.length < 4) {
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return DistortionParameters.identity;
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}
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// Calculer les distances de chaque point au centre
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final distances = <double>[];
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final angles = <double>[];
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for (final point in calibrationPoints) {
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final dx = point.x - centerX;
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final dy = point.y - centerY;
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distances.add(math.sqrt(dx * dx + dy * dy));
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angles.add(math.atan2(dy, dx));
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}
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// Trouver les axes majeur et mineur de l'ellipse
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double maxDist = 0, minDist = double.infinity;
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double maxAngle = 0;
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for (int i = 0; i < distances.length; i++) {
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if (distances[i] > maxDist) {
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maxDist = distances[i];
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maxAngle = angles[i];
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}
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if (distances[i] < minDist) {
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minDist = distances[i];
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}
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}
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// Calculer les facteurs de correction
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// On veut que maxDist et minDist deviennent égaux à expectedRadius
|
||||||
|
final scaleX = expectedRadius / maxDist;
|
||||||
|
final scaleY = expectedRadius / minDist;
|
||||||
|
final circularityRatio = minDist / maxDist;
|
||||||
|
|
||||||
|
return DistortionParameters(
|
||||||
|
scaleX: scaleX.clamp(0.5, 2.0),
|
||||||
|
scaleY: scaleY.clamp(0.5, 2.0),
|
||||||
|
rotation: maxAngle,
|
||||||
|
centerX: centerX,
|
||||||
|
centerY: centerY,
|
||||||
|
circularityRatio: circularityRatio,
|
||||||
|
);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applique la correction de distorsion à une image
|
||||||
|
///
|
||||||
|
/// [imagePath] : Chemin de l'image source
|
||||||
|
/// [params] : Paramètres de distorsion calculés
|
||||||
|
///
|
||||||
|
/// Retourne le chemin de l'image corrigée
|
||||||
|
Future<String> applyCorrection(
|
||||||
|
String imagePath,
|
||||||
|
DistortionParameters params,
|
||||||
|
) async {
|
||||||
|
final file = File(imagePath);
|
||||||
|
final bytes = await file.readAsBytes();
|
||||||
|
final image = img.decodeImage(bytes);
|
||||||
|
|
||||||
|
if (image == null) {
|
||||||
|
throw Exception('Impossible de décoder l\'image');
|
||||||
|
}
|
||||||
|
|
||||||
|
final correctedImage = _transformImage(image, params);
|
||||||
|
|
||||||
|
// Sauvegarder l'image corrigée
|
||||||
|
final tempDir = await getTemporaryDirectory();
|
||||||
|
final timestamp = DateTime.now().millisecondsSinceEpoch;
|
||||||
|
final outputPath = '${tempDir.path}/corrected_$timestamp.jpg';
|
||||||
|
|
||||||
|
final outputFile = File(outputPath);
|
||||||
|
await outputFile.writeAsBytes(img.encodeJpg(correctedImage, quality: 95));
|
||||||
|
|
||||||
|
return outputPath;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Transforme l'image pour corriger la distorsion
|
||||||
|
img.Image _transformImage(img.Image source, DistortionParameters params) {
|
||||||
|
final width = source.width;
|
||||||
|
final height = source.height;
|
||||||
|
|
||||||
|
// Créer une nouvelle image de même taille
|
||||||
|
final result = img.Image(width: width, height: height);
|
||||||
|
|
||||||
|
// Centre de transformation en pixels
|
||||||
|
final cx = params.centerX * width;
|
||||||
|
final cy = params.centerY * height;
|
||||||
|
|
||||||
|
// Précalculer cos/sin de la rotation
|
||||||
|
final cosR = math.cos(params.rotation);
|
||||||
|
final sinR = math.sin(params.rotation);
|
||||||
|
|
||||||
|
// Pour chaque pixel de l'image destination, trouver le pixel source correspondant
|
||||||
|
for (int y = 0; y < height; y++) {
|
||||||
|
for (int x = 0; x < width; x++) {
|
||||||
|
// Coordonnées relatives au centre
|
||||||
|
final dx = x - cx;
|
||||||
|
final dy = y - cy;
|
||||||
|
|
||||||
|
// Rotation inverse
|
||||||
|
final rx = dx * cosR + dy * sinR;
|
||||||
|
final ry = -dx * sinR + dy * cosR;
|
||||||
|
|
||||||
|
// Mise à l'échelle inverse (pour trouver d'où vient le pixel)
|
||||||
|
final sx = rx / params.scaleX;
|
||||||
|
final sy = ry / params.scaleY;
|
||||||
|
|
||||||
|
// Rotation dans l'autre sens
|
||||||
|
final fx = sx * cosR - sy * sinR;
|
||||||
|
final fy = sx * sinR + sy * cosR;
|
||||||
|
|
||||||
|
// Coordonnées source
|
||||||
|
final srcX = fx + cx;
|
||||||
|
final srcY = fy + cy;
|
||||||
|
|
||||||
|
// Interpolation bilinéaire
|
||||||
|
final pixel = _bilinearInterpolate(source, srcX, srcY);
|
||||||
|
result.setPixel(x, y, pixel);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Interpolation bilinéaire pour un échantillonnage de qualité
|
||||||
|
img.Color _bilinearInterpolate(img.Image image, double x, double y) {
|
||||||
|
final x0 = x.floor();
|
||||||
|
final y0 = y.floor();
|
||||||
|
final x1 = x0 + 1;
|
||||||
|
final y1 = y0 + 1;
|
||||||
|
|
||||||
|
// Vérifier les limites
|
||||||
|
if (x0 < 0 || y0 < 0 || x1 >= image.width || y1 >= image.height) {
|
||||||
|
// Retourner le pixel le plus proche pour les zones hors limites
|
||||||
|
return image.getPixel(
|
||||||
|
x.round().clamp(0, image.width - 1),
|
||||||
|
y.round().clamp(0, image.height - 1),
|
||||||
|
);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Poids pour l'interpolation
|
||||||
|
final wx = x - x0;
|
||||||
|
final wy = y - y0;
|
||||||
|
|
||||||
|
// Récupérer les 4 pixels voisins
|
||||||
|
final p00 = image.getPixel(x0, y0);
|
||||||
|
final p10 = image.getPixel(x1, y0);
|
||||||
|
final p01 = image.getPixel(x0, y1);
|
||||||
|
final p11 = image.getPixel(x1, y1);
|
||||||
|
|
||||||
|
// Interpoler chaque canal
|
||||||
|
final r = _lerp2D(p00.r.toDouble(), p10.r.toDouble(), p01.r.toDouble(), p11.r.toDouble(), wx, wy);
|
||||||
|
final g = _lerp2D(p00.g.toDouble(), p10.g.toDouble(), p01.g.toDouble(), p11.g.toDouble(), wx, wy);
|
||||||
|
final b = _lerp2D(p00.b.toDouble(), p10.b.toDouble(), p01.b.toDouble(), p11.b.toDouble(), wx, wy);
|
||||||
|
final a = _lerp2D(p00.a.toDouble(), p10.a.toDouble(), p01.a.toDouble(), p11.a.toDouble(), wx, wy);
|
||||||
|
|
||||||
|
return img.ColorRgba8(r.round().clamp(0, 255), g.round().clamp(0, 255), b.round().clamp(0, 255), a.round().clamp(0, 255));
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Interpolation linéaire 2D
|
||||||
|
double _lerp2D(double v00, double v10, double v01, double v11, double wx, double wy) {
|
||||||
|
final top = v00 * (1 - wx) + v10 * wx;
|
||||||
|
final bottom = v01 * (1 - wx) + v11 * wx;
|
||||||
|
return top * (1 - wy) + bottom * wy;
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Applique une correction de perspective simple basée sur 4 points
|
||||||
|
///
|
||||||
|
/// Cette méthode est utile quand la photo est prise en angle.
|
||||||
|
/// [corners] : Les 4 coins de la cible dans l'ordre (haut-gauche, haut-droite, bas-droite, bas-gauche)
|
||||||
|
Future<String> applyPerspectiveCorrection(
|
||||||
|
String imagePath,
|
||||||
|
List<({double x, double y})> corners,
|
||||||
|
) async {
|
||||||
|
if (corners.length != 4) {
|
||||||
|
throw ArgumentError('4 points de coin sont requis');
|
||||||
|
}
|
||||||
|
|
||||||
|
final file = File(imagePath);
|
||||||
|
final bytes = await file.readAsBytes();
|
||||||
|
final image = img.decodeImage(bytes);
|
||||||
|
|
||||||
|
if (image == null) {
|
||||||
|
throw Exception('Impossible de décoder l\'image');
|
||||||
|
}
|
||||||
|
|
||||||
|
final width = image.width;
|
||||||
|
final height = image.height;
|
||||||
|
|
||||||
|
// Convertir les coordonnées normalisées en pixels
|
||||||
|
final srcCorners = corners.map((c) => (x: c.x * width, y: c.y * height)).toList();
|
||||||
|
|
||||||
|
// Calculer la taille du rectangle destination
|
||||||
|
// On prend la moyenne des largeurs et hauteurs
|
||||||
|
final topWidth = _distance(srcCorners[0], srcCorners[1]);
|
||||||
|
final bottomWidth = _distance(srcCorners[3], srcCorners[2]);
|
||||||
|
final leftHeight = _distance(srcCorners[0], srcCorners[3]);
|
||||||
|
final rightHeight = _distance(srcCorners[1], srcCorners[2]);
|
||||||
|
|
||||||
|
final dstWidth = ((topWidth + bottomWidth) / 2).round();
|
||||||
|
final dstHeight = ((leftHeight + rightHeight) / 2).round();
|
||||||
|
|
||||||
|
// Créer l'image destination
|
||||||
|
final result = img.Image(width: dstWidth, height: dstHeight);
|
||||||
|
|
||||||
|
// Calculer la matrice de transformation perspective
|
||||||
|
final matrix = _computePerspectiveMatrix(
|
||||||
|
srcCorners,
|
||||||
|
[
|
||||||
|
(x: 0.0, y: 0.0),
|
||||||
|
(x: dstWidth.toDouble(), y: 0.0),
|
||||||
|
(x: dstWidth.toDouble(), y: dstHeight.toDouble()),
|
||||||
|
(x: 0.0, y: dstHeight.toDouble()),
|
||||||
|
],
|
||||||
|
);
|
||||||
|
|
||||||
|
// Appliquer la transformation
|
||||||
|
for (int y = 0; y < dstHeight; y++) {
|
||||||
|
for (int x = 0; x < dstWidth; x++) {
|
||||||
|
final src = _applyPerspectiveTransform(matrix, x.toDouble(), y.toDouble());
|
||||||
|
|
||||||
|
if (src.x >= 0 && src.x < width && src.y >= 0 && src.y < height) {
|
||||||
|
final pixel = _bilinearInterpolate(image, src.x, src.y);
|
||||||
|
result.setPixel(x, y, pixel);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Sauvegarder
|
||||||
|
final tempDir = await getTemporaryDirectory();
|
||||||
|
final timestamp = DateTime.now().millisecondsSinceEpoch;
|
||||||
|
final outputPath = '${tempDir.path}/perspective_$timestamp.jpg';
|
||||||
|
|
||||||
|
final outputFile = File(outputPath);
|
||||||
|
await outputFile.writeAsBytes(img.encodeJpg(result, quality: 95));
|
||||||
|
|
||||||
|
return outputPath;
|
||||||
|
}
|
||||||
|
|
||||||
|
double _distance(({double x, double y}) p1, ({double x, double y}) p2) {
|
||||||
|
final dx = p2.x - p1.x;
|
||||||
|
final dy = p2.y - p1.y;
|
||||||
|
return math.sqrt(dx * dx + dy * dy);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Calcule la matrice de transformation perspective (homographie)
|
||||||
|
List<double> _computePerspectiveMatrix(
|
||||||
|
List<({double x, double y})> src,
|
||||||
|
List<({double x, double y})> dst,
|
||||||
|
) {
|
||||||
|
// Résolution du système linéaire pour trouver la matrice 3x3
|
||||||
|
// Utilisation de la méthode DLT (Direct Linear Transform)
|
||||||
|
|
||||||
|
final a = List<List<double>>.generate(8, (_) => List.filled(9, 0.0));
|
||||||
|
|
||||||
|
for (int i = 0; i < 4; i++) {
|
||||||
|
final sx = src[i].x;
|
||||||
|
final sy = src[i].y;
|
||||||
|
final dx = dst[i].x;
|
||||||
|
final dy = dst[i].y;
|
||||||
|
|
||||||
|
a[i * 2] = [-sx, -sy, -1, 0, 0, 0, dx * sx, dx * sy, dx];
|
||||||
|
a[i * 2 + 1] = [0, 0, 0, -sx, -sy, -1, dy * sx, dy * sy, dy];
|
||||||
|
}
|
||||||
|
|
||||||
|
// Résolution par SVD simplifiée (on utilise une approximation)
|
||||||
|
// Pour une implémentation complète, il faudrait une vraie décomposition SVD
|
||||||
|
final h = _solveHomography(a);
|
||||||
|
|
||||||
|
return h;
|
||||||
|
}
|
||||||
|
|
||||||
|
List<double> _solveHomography(List<List<double>> a) {
|
||||||
|
// Implémentation simplifiée - normalisation et résolution
|
||||||
|
// En pratique, on devrait utiliser une vraie décomposition SVD
|
||||||
|
|
||||||
|
// Pour l'instant, retourner une matrice identité
|
||||||
|
// TODO: Implémenter une vraie résolution
|
||||||
|
return [1, 0, 0, 0, 1, 0, 0, 0, 1];
|
||||||
|
}
|
||||||
|
|
||||||
|
({double x, double y}) _applyPerspectiveTransform(List<double> h, double x, double y) {
|
||||||
|
final w = h[6] * x + h[7] * y + h[8];
|
||||||
|
if (w.abs() < 1e-10) {
|
||||||
|
return (x: x, y: y);
|
||||||
|
}
|
||||||
|
final nx = (h[0] * x + h[1] * y + h[2]) / w;
|
||||||
|
final ny = (h[3] * x + h[4] * y + h[5]) / w;
|
||||||
|
return (x: nx, y: ny);
|
||||||
|
}
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user