private static void MakeRequest()
{
var path = GetFilePath();
if (!string.IsNullOrEmpty(path) && File.Exists(path))
{
using (Stream stream = File.Open(path, FileMode.Open))
{
var tagger = ImageTaggingManager.GetImageTagger();
var result = tagger.GetImageDescription(stream, "en", true);
if (result.Status != ImageResult.ResultStatus.Success)
{
RenderError(result);
}
else
{
RenderOutput(result);
}
}
}
else
{
Console.WriteLine("Invalid file path");
}
}
/// <summary>
/// Uses Cognitive Services to analyze the supplied Image and return a descriptive caption, a series of tags, and/or any text discovered on
/// the image.
/// </summary>
/// <param name="mediaItem">The Image item to analyze.</param>
/// <returns>One of the following based on confidence: a descriptive caption, a series of tag words, any OCR text in the image, or null.</returns>
// ReSharper disable once InconsistentNaming
internal static string GetAltTextFromAI(this MediaItem mediaItem)
{
var imageStream = mediaItem.GetMediaStream();
var connectionName = Sitecore.Configuration.Settings.GetSetting("CognitiveImageTagging.ConnectionName");
IImageTagger tagger = null;
try
{
tagger = ImageTaggingManager.GetImageTagger(connectionName);
}
catch (ConfigurationException ex)
{
Log.Error("CognitiveImageTagging: Could not load an image tagger due to a configuration error. Check that you have a valid connection specified.", ex, typeof(IImageTagger));
throw;
}
var result = tagger.GetImageDescription(imageStream, mediaItem.InnerItem.Language.Name, true);
switch (result.Status)
{
case ImageResult.ResultStatus.Error:
Log.Error("Verndale.Feature.CognitiveImageTagging encountered an error getting Alt text from the AI service.", result.Exception, result);
return(null);
case ImageResult.ResultStatus.NoResponse:
Log.Warn("Verndale.Feature.CognitiveImageTagging: Received no valid response from AI service.", result);
return(null);
}
if (result.Captions != null)
{
foreach (var caption in result.Captions)
{
return(caption); // we only need the first one.
}
}
Log.Warn("CognitivieImageTagging: No captions were returned with sufficient confidence to be used as ALT text. If this happens frequently, consider lowering your confidence level.", typeof(IImageTagger));
// We didn't have any captions! Concatenate any tags just to get the content author started.
if (result.Tags != null)
{
return(string.Join(", ", result.Tags));
}
Log.Debug("Verndale.Feature.CognitiveImageTagging: result from AI service did not contain any captions or tags to use as Alt text.", result);
return(null);
}
