تشخیص چهره با فلاتر — راهنمای کاربردی

1final imageFile = await ImagePicker.pickImage(source:ImageSource.gallery);
2seState((){
3  isLoading = true;
4});

1final data = await file.readAsBytes();
2await decodeImageFromList(data).then(
3(value) => setState(() {
4    _image = value;
5    isLoading = false;
6  }),
7);

1final faceDetector = FirebaseVision.instance.faceDetector();
2List<Face> faces = await faceDetector.processImage(image);

1class FacePainter extends CustomPainter {
2  final ui.Image image;
3  final List<Face> faces;
4  final List<Rect> rects = [];
5
6  FacePainter(this.image, this.faces) {
7    for (var i = 0; i < faces.length; i++) {
8      rects.add(faces[i].boundingBox);
9    }
10  }
11
12  @override
13  void paint(ui.Canvas canvas, ui.Size size) {
14    final Paint paint = Paint()
15      ..style = PaintingStyle.stroke
16      ..strokeWidth = 15.0
17      ..color = Colors.yellow;
18
19    canvas.drawImage(image, Offset.zero, Paint());
20    for (var i = 0; i < faces.length; i++) {
21      canvas.drawRect(rects[i], paint);
22    }
23  }
24
25  @override
26  bool shouldRepaint(FacePainter oldDelegate) {
27    return image != oldDelegate.image || faces != oldDelegate.faces;
28  }
29}

1@override
2  Widget build(BuildContext context) {
3    return Scaffold(
4      body: isLoading
5          ? Center(child: CircularProgressIndicator())
6          : (_imageFile == null)
7              ? Center(child: Text('No image selected'))
8              : Center(
9                  child: FittedBox(
10                    child: SizedBox(
11                      width: _image.width.toDouble(),
12                      height: _image.height.toDouble(),
13                      child: CustomPaint(
14                        painter: FacePainter(_image, _faces),
15                      ),
16                    ),
17                  ),
18                ),
19      floatingActionButton: FloatingActionButton(
20        onPressed: _getImageAndDetectFaces,
21        tooltip: 'Pick Image',
22        child: Icon(Icons.add_a_photo),
23      ),
24    );
25  }