问题描述
我已经为此苦苦挣扎了大约24个小时,而关于如何解决这个问题的想法已经结束。
我编写了从Firebase加载图像并在其中检测到人脸的代码-完全没有问题。但是,当我随后尝试使用Flutter中的标准imagePicker类拍照时,尽管我实际上在屏幕上显示了图像以检查其是否为有效文件,但是faceDetector却无法在图片。
下面是该代码的编辑后版本。由于我的项目中缺少某些内容,因此不会进行编译,但希望您能理解。测试平台是iOS(设备,而不是模拟器)。插件为firebase_ml_vision 0.9.6 + 2,而Flutter的版本是几天前的最新版本。
有人有什么想法吗?
import 'package:Flutter/material.dart';
import 'package:firebase_ml_vision/firebase_ml_vision.dart';
import 'package:image_picker/image_picker.dart';
import 'package:modal_progress_hud/modal_progress_hud.dart';
import 'dart:io';
import 'dart:async';
import 'package:camera/camera.dart';
class imageComparison extends StatefulWidget {
@override
_imageComparison createState() => _imageComparison();
}
class _imageComparison extends State<imageComparison> {
CameraController controller;
List<CameraDescription> cameras;
File chosenImage;
bool gotimage = false;
File grabbedImage;
FaceDetector faceDetector;
File tempImg;
@override
void initState() {
super.initState();
faceDetector = FirebaseVision.instance.faceDetector(FaceDetectorOptions(enableLandmarks: true,enableContours: true,enableClassification: true));
availableCameras().then((value) {
cameras = value;
controller = CameraController(cameras[1],ResolutionPreset.medium);
controller.initialize().then((_) {
if (!mounted) {
return;
}
setState(() {});
});
});
}
@override
Widget build(BuildContext context) {
if (controller == null) {
return Scaffold(
backgroundColor: Colors.white,body: Container(),);
}
if (!gotimage) {
File img;
downloadImage(imageURLs[0],'verificationImage.jpg').then((value) {
img = tempImg = value;
extractFace(img).then((value2) {
print('got image');
gotimage = true;
setState(() {});
});
});
}
return Scaffold(
backgroundColor: Colors.white,body: ModalProgressHUD(
inAsyncCall: globals.showSpinner,child: Container(
width: globals.SizeConfig.blockSizeHorizontal * 100,height: globals.SizeConfig.blockSizeVertical * 100,decoration: Boxdecoration(
gradient: gradient,),child: Stack(
children: <Widget>[
Positioned(
left: globals.SizeConfig.blockSizeHorizontal * 10,top: globals.SizeConfig.blockSizeVertical * 5,child: Column(
children: [
FlatButton(
child: Text(
'check',textAlign: TextAlign.center,style: TextStyle(color: Colors.white,fontSize: globals.SizeConfig.blockSizeHorizontal * 4),color: Colors.red,onpressed: () async {
bool res = await takeAndAnalyseImage();
//other stuff
},],);
}
Future<bool> takeAndAnalyseImage() async {
//String filepath = await takePicture();
grabbedImage = File((await ImagePicker().getimage(source: ImageSource.camera)).path);
//grabbedImage = File(filepath);
setState(() {
print('setting state');
});
while (grabbedImage == null) {}
if (mounted) {
extractFace(grabbedImage).then((value) {
//irrelevant stuff
});
}
return null;
}
Future<Map<String,dynamic>> extractFace(File img) async {
FirebaseVisionImage visionImage;
visionImage = FirebaseVisionImage.fromFile(img);
Map<String,dynamic> facevals = Map<String,dynamic>();
List<Face> faces;
try {
faces = await faceDetector.processImage(visionImage);
} catch (e) {
print('can\'t extract face from image. e = ' + e.toString());
}
for (Face face in faces) {
//do irrelevant stuff to question.
}
return facevals;
}
}
编辑:将图像转换为'FirebaseVisionImage'
似乎效果很好-是FaceDetector.processImage
失败了...
解决方法
暂无找到可以解决该程序问题的有效方法,小编努力寻找整理中!
如果你已经找到好的解决方法,欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@)