/// <summary>
/// Checks if this module appears to be non-empty.
/// </summary>
/// <returns>True if the module appears to be non-empty; False otherwise.</returns>
public virtual bool HasValues()
{
return(DefinedTags.Any(t =>
{
DicomAttribute a;
return DicomAttributeProvider.TryGetAttribute(t, out a) && !a.IsEmpty;
}));
}
// TODO (CR May 2011): Doesn't feel 100% like this method belongs here,
// but it doesn't quite fit into DicomPixelData either, which is probably where it should go.
/// <summary>
/// Extracts all overlays embedded in pixel data and populates the <see cref="DicomTags.OverlayData"/> attribute.
/// </summary>
/// <returns>True if any overlays were actually extracted, otherwise false.</returns>
/// <remarks>Certain restrictions apply to the use of this method:
/// <list type="bullet">
/// <item><see cref="IodBase.DicomAttributeProvider"/> must be a <see cref="DicomAttributeCollection"/>.</item>
/// <item>The <see cref="DicomTags.PixelData"/> attribute must not contain encapsulated pixel data.
/// Check the <see cref="TransferSyntax"/> of the source message before calling this method.</item>
/// </list>
/// </remarks>
public bool ExtractEmbeddedOverlays()
{
var collection = base.DicomAttributeProvider as DicomAttributeCollection;
if (collection == null)
{
throw new ArgumentException("Module must wrap a DicomAttributeCollection in order to extract overlays.");
}
DicomAttribute attribute;
if (!DicomAttributeProvider.TryGetAttribute(DicomTags.PixelData, out attribute))
{
Platform.Log(LogLevel.Debug, "Sop does not appear to have any pixel data from which to extract embedded overlays.");
return(false);
}
if (attribute is DicomFragmentSequence)
{
Platform.Log(LogLevel.Debug, "Sop pixel data must be uncompressed to extract overlays.");
return(false);
}
if (attribute.IsNull)
{
Platform.Log(LogLevel.Debug, "Sop pixel data has no valid value and cannot have embedded overlays extracted.");
return(false);
}
var pixelData = new DicomUncompressedPixelData(collection);
bool anyExtracted = false;
// Check if Overlay is embedded in pixels
foreach (var overlay in this)
{
if (overlay.HasOverlayData)
{
continue;
}
Platform.Log(LogLevel.Debug, "SOP Instance has embedded overlay in pixel data, extracting");
overlay.ExtractEmbeddedOverlay(pixelData);
anyExtracted = true;
}
return(anyExtracted);
}
public bool TryGetAttribute(DicomTag tag, out DicomAttribute attribute)
{
return(DicomAttributeProvider.TryGetAttribute(tag, out attribute));
}