PDF417 barcodes not recognized #128
Description
Not sure if the problem is here or the flutter_ml_vision pub so if it needs to move got it.
I've noticed that all printed PDF417 barcodes are not being recognized. I've tried numerous driver's licenses and other identification documents but none seem to scan. However, if I generate the same barcode using an online generator the barcode is captured and decoded without a problem.
Other barcode formats (EAN), on the same documents are read and parsed with no problem.
class _BadgedTabState extends State<BadgedTab> {
List<String> data = [];
final _scanKey = GlobalKey<CameraMlVisionState>();
BarcodeDetector detector = FirebaseVision.instance.barcodeDetector(
BarcodeDetectorOptions(barcodeFormats: BarcodeFormat.pdf417));
@override
void dispose() {
detector.close();
super.dispose();
}
@override
Widget build(BuildContext context) {
final Stream<QuerySnapshot> stream = FirebaseFirestore.instance
.collection('badged')
.where('entryPointId', isEqualTo: widget.entryPoint.id)
.orderBy('timestamp', descending: true)
.snapshots();
return StreamBuilder(
stream: stream,
builder: (_, AsyncSnapshot<QuerySnapshot> snapshot) {
if (snapshot.hasError) {
print(snapshot.error);
}
if (snapshot.connectionState == ConnectionState.waiting) {
return Loading();
}
return Column(
children: <Widget>[
SizedBox(
width: double.infinity,
height: 100,
child: Stack(
fit: StackFit.expand,
children: <Widget>[
Container(
margin: EdgeInsets.all(8.0),
padding: EdgeInsets.all(2.0),
child: CameraMlVision<List<Barcode>>(
key: _scanKey,
detector: detector.detectInImage,
resolution: ResolutionPreset.max,
onResult: (barcodes) {
if (barcodes == null ||
barcodes.isEmpty ||
data.contains(barcodes.first.displayValue) ||
!mounted) {
return;
}
print(barcodes.first.displayValue);
setState(() {
data.add(barcodes.first.displayValue);
});
},
onDispose: () {
//detector.close(); // crashes after scan if dispose is used here
},
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10),
border: Border.all(color: Colors.teal),
),
),
],
),
),
Expanded(
child: ListView(
children: snapshot.data.docs.map((QueryDocumentSnapshot doc) {
BadgedEntry entry = BadgedEntry.fromMap(doc.data(), doc.id);
final dateFormat = new DateFormat('dd.MM.yy HH:mm');
return Dismissible(
key: Key(doc.id),
background: Container(
color: Colors.red,
padding: EdgeInsets.symmetric(horizontal: 16.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Icon(Icons.delete_outline, color: Colors.white),
Icon(Icons.delete_outline, color: Colors.white),
],
),
),
onDismissed: (direction) {},
child: ListTile(
leading: CircleAvatar(
backgroundColor: Colors.blue,
child: Text(
'${entry.firstName[0]}${entry.lastName[0]}',
style: TextStyle(color: Colors.white),
),
),
title: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'${entry.rank} ${entry.lastName}, ${entry.firstName}'),
Text(
dateFormat.format(entry.timestamp.toDate()),
style: TextStyle(fontSize: 14.0),
)
],
),
],
),
),
);
}).toList()),
),
],
);
},
);
}
}
dependencies:
flutter:
sdk: flutter
firebase_core: 0.5.2
firebase_auth: ^0.18.3
firebase_ml_vision: ^0.9.9
flutter_camera_ml_vision: ^2.3.0
cloud_firestore: ^0.14.3
intl: ^0.16.1
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• jab-iphone (mobile) • • ios •
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• No issues found!