如何从Firebase面部识别中获取图像并将其显示在图像小部件中

Question

如何从Firebase面部识别中获取图像并将其显示在图像小部件中 这是初始化Camera的代码，并发送给Test类

void _initializeCamera2() async {
     loadModel();
    CameraDescription description = await getCamera(_direction);

    ImageRotation rotation = rotationIntToImageRotation(
      description.sensorOrientation,
    );

    _camera =
        CameraController(description, ResolutionPreset.low, enableAudio: false);
    await _camera.initialize();
    await Future.delayed(Duration(milliseconds: 500));
    tempDir = await getApplicationDocumentsDirectory();
    /*String _embPath = tempDir.path + '/emb.json';
    jsonFile = new File(_embPath);
    if (jsonFile.existsSync()) data = json.decode(jsonFile.readAsStringSync());
*/
    _camera.startImageStream((CameraImage image) {
      if (_camera != null) {
        if (_isDetecting) return;
        _isDetecting = true;
        String res;
        dynamic finalResult = Multimap<String, Face>();
        detect(image, _getDetectionMethod(), rotation).then(
          (dynamic result) async {
            if (result.length == 0)
              _faceFound = false;
            else
              _faceFound = true;
            Face _face;
            imglib.Image convertedImage =
                _convertCameraImage(image, _direction);
            for (_face in result) {
              double x, y, w, h;
              x = (_face.boundingBox.left - 10);
              y = (_face.boundingBox.top - 10);
              w = (_face.boundingBox.width + 10);
              h = (_face.boundingBox.height + 10);
              imglib.Image croppedImage = imglib.copyCrop(
                  convertedImage, x.round(), y.round(), w.round(), h.round());
              croppedImage = imglib.copyResizeCropSquare(croppedImage, 112);
              // int startTime = new DateTime.now().millisecondsSinceEpoch;
              res2 = _recog(croppedImage);
              // int endTime = new DateTime.now().millisecondsSinceEpoch;
              // print("Inference took ${endTime - startTime}ms");
              Navigator.of(context)
                .push(
                  MaterialPageRoute (
                    builder: (_) => Test(img:croppedImage)
                    )
                  );
              finalResult.add(res2, _face);
            }
            setState(() {
              _scanResults = finalResult;
            });

            _isDetecting = false;
          },
        ).catchError(
          (_) {
            _isDetecting = false;
          },
        );
      }
    });
  }

这是用于显示Image

的Test类

class Test extends StatelessWidget {
  var img;
  Test({this.img});
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Image.file(img),
      ),
    );
  }
}