我有Microsoft Azure认知服务的问题。
当我使用相机在手机上拍照时,默认情况下它保存在路径中:
DCIM /摄像机
,但是当我使用我的应用程序拍照时,它已保存
积分存储/图片/温度
情况简要介绍:
1)我正在使用默认相机拍照,我可以在我的应用程序中使用Plugin.Media
和MCS
完美地打开它,代码:
private async void btnPick_Clicked(object sender, EventArgs e)
{
await CrossMedia.Current.Initialize();
var file = await CrossMedia.Current.PickPhotoAsync(new PickMediaOptions());
Image = ImageSource.FromStream(() => file.GetStream());
var result = client.RecognizeTextAsync(file.GetStream()).Result;
var words = from r in result.Regions
from l in r.Lines
from w in l.Words
select w.Text;
OutputText = string.Join(" ", words.ToArray());
await Navigation.PushAsync(new TextFromPhoto(OutputText, Image));
}
2)当我使用我的应用程序使用此代码拍照时:
private async void btnTake_Clicked(object sender, EventArgs e)
{
await CrossMedia.Current.Initialize();
if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
{
await DisplayAlert("No Camera", ":( No camera available.", "OK");
return;
}
var file = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
{
SaveToAlbum = true
});
Image = ImageSource.FromStream(() => file.GetStream());
var myStream = file.GetStream();
var result = client.RecognizeTextAsync(myStream).Result;
var words = from r in result.Regions
from l in r.Lines
from w in l.Words
select w.Text;
OutputText = string.Join(" ", words.ToArray());
await Navigation.PushAsync(new TextFromPhoto(OutputText, Image));
}
应用程序进入中断模式,并在此行开始中断:
var result = client.RecognizeTextAsync(myStream).Result;
该行在前一种方法中有效
这是androidmanifest.xml
:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.OCRScannerForms.Android" android:installLocation="auto">
<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="27" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application android:label="OCRScannerForms.Android">
<provider android:name="android.support.v4.content.FileProvider" android:authorities="${applicationId}.fileprovider" android:exported="false" android:grantUriPermissions="true">
<meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths"></meta-data>
</provider>
</application>
</manifest>
这是Resources/xml/file_paths.xml
:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-files-path name="my_images" path="Pictures" />
<external-files-path name="my_movies" path="Movies" />
</paths>
有趣的是我无法在我的应用程序中打开的事实,我在我的应用程序中拍摄的照片。
我怀疑问题与照片路径有关,但我无法修复此问题
你应该使用新的Computer Vision API
而不是Microsoft.ProjectOxford.Vision
例如:
private async void btnTake_Clicked(object sender, EventArgs e)
{
await CrossMedia.Current.Initialize();
if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
{
await DisplayAlert("No Camera", ":( No camera available.", "OK");
return;
}
var file = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
{
SaveToAlbum = true,
PhotoSize = PhotoSize.Small
});
var Image = ImageSource.FromStream(() => file.GetStream());
var client = new HttpClient();
var queryString = HttpUtility.ParseQueryString(string.Empty);
// Request headers
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", subscriptionKey);
// Request parameters
queryString["mode"] = "Printed";
var uri = "https://eastus.api.cognitive.microsoft.com/vision/v2.0/recognizeText?" + queryString;
HttpResponseMessage response;
var myStream = file.GetStream();
BinaryReader binaryReader = new BinaryReader(myStream);
var byteData = binaryReader.ReadBytes((int)myStream.Length);
using (var content = new ByteArrayContent(byteData))
{
content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
response = await client.PostAsync(uri, content);
}
string operationLocation = "";
operationLocation = response.Headers.GetValues("Operation-Location").FirstOrDefault();
string contentString;
int i = 0;
do
{
System.Threading.Thread.Sleep(1000);
response = await client.GetAsync(operationLocation);
contentString = await response.Content.ReadAsStringAsync();
++i;
}
while (i < 10 && contentString.IndexOf("\"status\":\"Succeeded\"") == -1);
Label1.Text = JToken.Parse(contentString).ToString();
}
结果是:
请查看以下链接以获取更多信息:https://westus.dev.cognitive.microsoft.com/docs/services/5adf991815e1060e6355ad44/operations/587f2c6a154055056008f200