private async Task EvaluateVideoFrameAsync(VideoFrame frame)
{
if (frame != null)
{
try
{
MyCustomVisionModelInput inputData = new MyCustomVisionModelInput
{
data = frame
};
var results = await _model.EvaluateAsync(inputData);
var loss = results.loss.ToList().OrderByDescending(x => x.Value);
var lossStr = string.Join(", ", loss.Select(l => l.Key + " " + (l.Value * 100.0f).ToString("#0.00") + "%"));
var message = $" Predictions: {lossStr}";
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => StatusText.Text = message);
Debug.WriteLine(message);
List <string> linesToDisplay = loss.Take(4).Select(a => $"{a.Key} {(a.Value * 100.0f):#0.00}%").ToList();
_spiDisplay.WriteLinesToScreen(linesToDisplay);
}
catch (Exception ex)
{
Debug.WriteLine($"error: {ex.Message}");
}
}
}
public async Task <MyCustomVisionModelOutput> EvaluateAsync(MyCustomVisionModelInput input)
{
MyCustomVisionModelOutput output = new MyCustomVisionModelOutput();
LearningModelBindingPreview binding = new LearningModelBindingPreview(learningModel);
binding.Bind("data", input.data);
binding.Bind("classLabel", output.classLabel);
binding.Bind("loss", output.loss);
LearningModelEvaluationResultPreview evalResult = await learningModel.EvaluateAsync(binding, string.Empty);
return(output);
}