/// <summary>
/// Convert the image to a specific format.
/// </summary>
/// <param name="image">The ITK image.</param>
/// <returns>
/// The rescaled ITK image.
/// </returns>
/// <exception cref="ArgumentNullException">image</exception>
private Image ApplyRescaleIntensityImageFilter(Image image)
{
if (image == null)
{
throw new ArgumentNullException(nameof(image));
}
Image output = null;
try
{
// Execute rescale intensity image filter
RescaleIntensityImageFilter filterRS = new RescaleIntensityImageFilter();
filterRS.SetOutputMinimum(0);
filterRS.SetOutputMaximum(255);
output = filterRS.Execute(image);
filterRS.Dispose();
}
catch (Exception)
{
// ignore "RescaleIntensityImageFilter(000000F79D6CFC40):
// Minimum output value cannot be greater than Maximum output value." exceptions
}
return(output ?? image);
}
private Image ApplyRescaleIntensityImageFilter(Image image, int retryCount = 0)
{
Ensure.ArgumentNotNull(image, nameof(image));
if (retryCount > 1)
{
return(image);
}
else
{
try
{
// Execute rescale intensity image filter
RescaleIntensityImageFilter filter = new RescaleIntensityImageFilter();
filter.SetOutputMinimum(0);
filter.SetOutputMaximum(255);
Image output = filter.Execute(image);
filter.Dispose();
image.Dispose();
return(output);
}
catch (Exception)
{
// System.ApplicationException: Exception thrown in SimpleITK RescaleIntensityImageFilter_Execute:
// "Minimum output value cannot be greater than Maximum output value."
// Applying the CastImageFilter before the RescaleIntensityImageFilter.
Image castedImage = ApplyCastImageFilter(image);
Image output = ApplyRescaleIntensityImageFilter(castedImage, ++retryCount);
castedImage.Dispose();
return(output);
}
}
}
