Microsoft ProjectOxford Vision API ClientException 错误

Posted 2023-03-28

【中文标题】Microsoft ProjectOxford Vision API ClientException 错误

【英文标题】：Microsoft ProjectOxford Vision API ClientException Error

【发布时间】：2017-08-10 12:55:17

【问题描述】：

我正在研究 MS 的新 API，但在学习教程时遇到了错误。 这是我的完整代码。我试图用这个来获得图像的颜色。 我得到的回报是“错误返回 CV”所以我没有得到 null imageStream 也不分析结果。 先感谢您！

   namespace UWPApp1

  public sealed partial class MainPage : Page

     IRandomAccessStream imageStream;

    const string APIKEY_CV = [MyComputerVisionKeyComesHere];
    VisionServiceClient VisionClient = new VisionServiceClient(APIKEY_CV);
    AnalysisResult analysisResult;

    public MainPage()
    
      this.InitializeComponent();
    

    private async void button_Click(object sender, RoutedEventArgs e)
    
        try
        
          FileSavePicker fileSavePicker = new FileSavePicker();
            fileSavePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
            fileSavePicker.FileTypeChoices.Add("JPEG files", new List<string>()  ".jpg" );
            fileSavePicker.SuggestedFileName = "image";

            var outputFile = await fileSavePicker.PickSaveFileAsync();

            if (outputFile == null)
            
                // The user cancelled the picking operation
                return;
            

            imageStream = await outputFile.OpenAsync(FileAccessMode.Read);

              BitmapImage imageTest = new BitmapImage();
              imageTest.SetSource(imageStream);

            image.Source = imageTest;
                       
        catch 
            textBox.Text = "Error taking photo";
        
    

    private async void button1_Click(object sender, RoutedEventArgs e)
    
        try
        
         VisualFeature[] feature = new VisualFeature[]  VisualFeature.Tags, VisualFeature.Description, VisualFeature.Color ;
           analysisResult = await VisionClient.AnalyzeImageAsync(imageStream.AsStream(), feature);

            if (analysisResult != null)
            
                   var color = analysisResult.Color;
                   textBox.Text = "The Accent Color is" + color.AccentColor;

            
            else 
                textBox.Text = "analysisResult is null";
            

        
        catch 
            textBox.Text = "Error Return CV";
        
    

   

【参考方案1】：

Project oxford vision API ocr exception

我用同样的方法解决了。 我添加了 imageStream.Seek(0);在我的代码中