/// <summary>
/// Implementation of <see cref="ChestXRayAIClient.Analyze(SKBitmap, CancellationToken)"/> using a single model.
/// </summary>
public override Task <(ScoreOutput[], CAM[])> Analyze(SKBitmap inputImage, CancellationToken cancellationToken)
{
ValidateImageDimensions(inputImage);
return(Task.Factory.StartNew(() =>
{
// We have to check for cancellation before each of the following steps
// Pass the image to the model and run an inference on it
cancellationToken.ThrowIfCancellationRequested();
float[][] modelOutputs = model.Predict(inputImage);
// Extract the score data and package it up into a convenient object array (ScoreOutput[])
cancellationToken.ThrowIfCancellationRequested();
float[] scoreData = modelOutputs[0];
ScoreOutput[] scores = GenerateScoreArray(scoreData);
// Extract the CAM data and post-process it to generate the CAM objects
cancellationToken.ThrowIfCancellationRequested();
float[] camData = modelOutputs[1];
CAM[] cams = GenerateCAMArray(camData);
// Final cancellation check
cancellationToken.ThrowIfCancellationRequested();
return (scores, cams);
}, cancellationToken));
}
private Task <ScoreOutput[]> GetScores(SKBitmap inputImage, CancellationToken cancellationToken)
{
return(Task.Factory.StartNew(() =>
{
cancellationToken.ThrowIfCancellationRequested();
float[] scoreModelOutput = scoreModel.Predict(inputImage);
cancellationToken.ThrowIfCancellationRequested();
ScoreOutput[] scores = GenerateScoreArray(scoreModelOutput);
cancellationToken.ThrowIfCancellationRequested();
return scores;
}, cancellationToken));
}
private Task <CAM[]> GetCAMs(SKBitmap inputImage, CancellationToken cancellationToken)
{
return(Task.Factory.StartNew(() =>
{
cancellationToken.ThrowIfCancellationRequested();
float[] camModelOutput = camModel.Predict(inputImage);
cancellationToken.ThrowIfCancellationRequested();
CAM[] cams = GenerateCAMArray(camModelOutput);
cancellationToken.ThrowIfCancellationRequested();
return cams;
}, cancellationToken));
}