A resource failed to call close -flutter/tflite error - tensorflow

Question

I want to do image processing in flutter. I load the ml model(tflite) in flutter. Here I successfully take the image from gallery/camera . I stuck in processing part of the image .I didnt get the required ouput. please help me
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:tflite/tflite.dart';
void main() {
runApp(new MaterialApp(
title: "corona",
home: LandingScreen(),
));
}
class LandingScreen extends StatefulWidget {
#override
_LandingScreenState createState() => _LandingScreenState();
}
class _LandingScreenState extends State<LandingScreen> {
File imageFile;
String result;
String path;
_openGallery(BuildContext context) async {
var picture = await ImagePicker.pickImage(source: ImageSource.gallery);
this.setState(() {
imageFile = picture;
path = picture.path;
});
Navigator.of(context).pop();
}
_openCamera(BuildContext context) async {
var picture = await ImagePicker.pickImage(source: ImageSource.camera);
this.setState(() {
imageFile = picture;
path = picture.path;
});
Navigator.of(context).pop();
}
// **classifyimage function to process the image from tflite**
Future classifyImage() async {
await Tflite.loadModel(
model: "assets/covid19_densenet.tflite",
labels: "assets/x.txt",
);
var output = await Tflite.runModelOnImage(path: path);
setState(() {
result = output.toString();
});
}
// Other functions
Future<void> _showChoiceDialog(BuildContext context) {
return showDialog(context: context, builder: (BuildContext context) {
return AlertDialog(
title: Text("Make a Choose!"),
content: SingleChildScrollView(
child: ListBody(
children: <Widget>[
GestureDetector(
child: Text("Gallery"),
onTap: () {
_openGallery(context);
},
),
Padding(padding: EdgeInsets.all(8.0)),
GestureDetector(
child: Text("Camera"),
onTap: () {
_openCamera(context);
},
)
],
),
),
);
});
}
Widget _decideImageView() {
if (imageFile == null) {
return Text("No Image Selected!");
} else {
return Image.file(imageFile, width: 400, height: 400);
}
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("CORONA DETECTION"),
),
body: Container(
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
_decideImageView(),
RaisedButton(
onPressed: () {
_showChoiceDialog(context);
},
child: Text("select image!"),
),
Container(
margin: EdgeInsets.fromLTRB(0, 0, 0, 0),
child: RaisedButton(
onPressed: () => classifyImage(),
child: Text('Classify Image'),
textColor: Colors.white,
color: Colors.blue,
padding: EdgeInsets.fromLTRB(12, 12, 12, 12),
),
),
result == null ? Text('Result') : Text(result)
],
),
),
),
);
}
}
This is an UI of application. when i tap on the classify image button
Here i am trying to upload image to model by this button and then it processing and returns the output

Answer 1

The tflite seems to be throwing a BufferOverflowException due to lack of grayscale support on onFrame methods. The issue should have been fixed as mentioned on this GitHub issue ticket.