我正在尝试使用Vision Cognitive Services来接收图像的描述,但我的代码总是抛出此异常:
Exception Microsoft.ProjectOxford.Vision.ClientException
HResult=0x80131500
Origine=<Non è possibile valutare l'origine dell'eccezione>
Stack:
in Microsoft.ProjectOxford.Vision.VisionServiceClient.HandleException (Exception exception)
in Microsoft.ProjectOxford.Vision.VisionServiceClient.<SendAsync>b__42_1[TRequest,TResponse](Exception e)
in System.AggregateException.Handle(Func`2 predicate)
in Microsoft.ProjectOxford.Vision.VisionServiceClient.<SendAsync>d__42`2.MoveNext()
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
in Microsoft.ProjectOxford.Vision.VisionServiceClient.<AnalyzeImageAsync>d__21`1.MoveNext()
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
in Microsoft.ProjectOxford.Vision.VisionServiceClient.<AnalyzeImageAsync>d__20.MoveNext()
in System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
in System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
in System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
in CognitiveServices.MainPage.<Button_Clicked>d__1.MoveNext() in C:\Users\manu9\documents\visual studio 2017\Projects\CognitiveServices\CognitiveServices\CognitiveServices\MainPage.xaml.cs: riga 48
这是我的代码:
using Microsoft.ProjectOxford.Vision;
using Microsoft.ProjectOxford.Vision.Contract;
using Plugin.Media;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;
namespace CognitiveServices
{
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
}
private async void Button_Clicked(object sender, EventArgs e)
{
var media = Plugin.Media.CrossMedia.Current;
await media.Initialize();
var file = await media.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
{
SaveToAlbum = false
});
image.Source = ImageSource.FromStream(() => file.GetStream());
var visionClient = new VisionServiceClient("MY_API_KEY");
var visualFeats = new VisualFeature[]
{
VisualFeature.Description,
VisualFeature.Faces
};
Stream imagestream = file.GetStream();
imagestream.Seek(0, SeekOrigin.Begin);
var result = await visionClient.AnalyzeImageAsync(imagestream, visualFeats);
description.Text = result.Description.Captions.First().Text;
Debug.WriteLine(result.Description.Captions[0].Text);
file.Dispose();
}
}
}
为什么我总是有这个例外?我读到有人通过添加像_2927096这样的东西来解决这个问题,这是真的吗?
1 回答
很可能您的API密钥与您正在达到的 endpoints 不对应 . 如果您查看source code of the client,您会看到默认情况下它会击中美国西部(
https://westus.api.cognitive.microsoft.com/vision/v1.0
)并且您的密钥可能与其他区域对应(就像我的情况一样) .您可以通过执行
new VisionServiceClient(apiKey, apiRoot)
来更改此设置,其中apiRoot
是通过Azure门户获取的:工作代码,在我的情况下输出
Satya Nadella wearing glasses and smiling at the camera
.