public static async Task VisionAnalyticsAsync(TraceWriter log, string fileURLWithSAS, ImageBatchResult imageBatchResult)
{
ComputerVisionClient computerVision = new ComputerVisionClient(new ApiKeyServiceClientCredentials(VisionSubscriptionKey),
new DelegatingHandler[] { });
computerVision.Endpoint = ComputerVisionEndpoint;
string imageURLwithoutSAS = fileURLWithSAS.Substring(0, fileURLWithSAS.IndexOf('?'));
CognitiveImageAnalysis cogniiveImageAnalysis = new CognitiveImageAnalysis {
imageURL = imageURLwithoutSAS
};
CognitiveImageTextAnalysis cognitiveImageTextAnalysis = new CognitiveImageTextAnalysis {
imageURL = imageURLwithoutSAS
};
var t1 = AnalyzeRemoteAsync(computerVision, fileURLWithSAS, cogniiveImageAnalysis);
var t2 = ExtractRemoteTextAsync(computerVision, fileURLWithSAS, log, cognitiveImageTextAnalysis);
await Task.WhenAll(t1, t2);
imageBatchResult.imageAnalyses.Add(cogniiveImageAnalysis);
imageBatchResult.imageTextAnalyses.Add(cognitiveImageTextAnalysis);
}
private static async Task GetTextAsync(ComputerVisionClient computerVision, string operationLocation, TraceWriter log, CognitiveImageTextAnalysis cognitiveImageTextAnalysis)
{
string operationId = operationLocation.Substring(operationLocation.Length - numberOfCharsInOperationId);
log.Info("\nCalling GetHandwritingRecognitionOperationResultAsync()");
TextOperationResult result = await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
log.Info("Server status: " + result.Status + ", waiting " + i + " seconds...");
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
cognitiveImageTextAnalysis.textOperationResult = result;
}
private static async Task ExtractRemoteTextAsync(ComputerVisionClient computerVision, string fileURLWithSAS, TraceWriter log, CognitiveImageTextAnalysis cognitiveImageTextAnalysis)
{
try
{
if (ValidateImage(2, fileURLWithSAS))
{
RecognizeTextHeaders textHeaders = await computerVision.RecognizeTextAsync(fileURLWithSAS, textRecognitionMode);
await GetTextAsync(computerVision, textHeaders.OperationLocation, log, cognitiveImageTextAnalysis);
}
else
{
cognitiveImageTextAnalysis.error = "Image Validation Failed for ImageTextAnalytics API ";
}
}
catch (Exception e)
{
if (e is ComputerVisionErrorException)
{
ComputerVisionErrorException ex = (ComputerVisionErrorException)e;
cognitiveImageTextAnalysis.error = ex.Message.ToString() + " due to " + ex.Response.Content;
}
else
{
cognitiveImageTextAnalysis.error = e.Message.ToString();
}
}
}
