/// <summary>
/// Reads the image asynchronous.
/// </summary>
/// <param name="path">The location of the image on the file system.</param>
/// <param name="ct">The cancellation token.</param>
/// <returns>
/// The ITK image.
/// </returns>
/// <exception cref="ArgumentNullException">
/// path
/// or
/// ct
/// </exception>
public async Task <Image> ReadImageAsync(string path, CancellationToken ct)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException(nameof(path));
}
if (ct == null)
{
throw new ArgumentNullException(nameof(ct));
}
return(await Task.Run(
() =>
{
// TODO:
// - check if path is a directory
// - check if path contains multiple files
// - determine file format
// read DICOM image series
// https://simpleitk.readthedocs.io/en/master/Examples/DicomSeriesReader/Documentation.html
using (ImageFileReader reader = new ImageFileReader())
{
try
{
ct.Register(() =>
{
reader.Abort();
});
ct.ThrowIfCancellationRequested();
reader.SetFileName(path);
Image image = reader.Execute();
image = ApplyRescaleIntensityImageFilter(image);
image = ApplyCastImageFilter(image);
return image;
}
catch (OperationCanceledException e)
{
throw new AmiException("The reading of the ITK image has been cancelled.", e);
}
catch (Exception e)
{
throw new AmiException("The ITK image could not be read.", e);
}
}
}, ct));
}