public static void RoundTripAndRender()
{
foreach (FileInfo fi in new DirectoryInfo("..\\CompressionSamples").GetFiles("*.dcm"))
{
Console.WriteLine("Compression Test -- Filename: " + fi.Name);
DICOMData data = new DICOMData();
data.ParseFile(fi.FullName, true, new NullLogger());
TransferSyntax syntax = data.TransferSyntax;
int compressedLength = (int)data[DICOMTags.PixelData].GetDataLength(false);
data.Uncompress();
Image testImage = DICOMQuickRenderer.QuickRender(data, 0);
Assert.IsNotNull(testImage);
int uncompressedLength = (int)data[DICOMTags.PixelData].GetDataLength(false);
Assert.IsTrue(uncompressedLength > compressedLength);
if (CompressionWorker.SupportsCompression(syntax.Compression))
{
data.ChangeTransferSyntax(syntax);
int recompressedLength = (int)data[DICOMTags.PixelData].GetDataLength(false);
Assert.IsTrue(recompressedLength < uncompressedLength);
}
//data.WriteFile(fi.FullName.Replace(".dcm", "_un.dcm"));
}
}
/// <summary>
/// Checks to see if we support both the decompression (if any) and compression (if any) to perform the transfer syntax change requested.
/// If either step is not available, then this will return false, but you may still be able to do a decompression. You can check that with
/// the static methods on <see cref="DICOMSharp.Data.Compression.CompressionWorker"/>.
/// </summary>
/// <param name="newSyntax">The new transfer syntax you'd like to change to</param>
/// <returns>Whether or not the complete change can be performed.</returns>
public bool CanChangeTransferSyntax(TransferSyntax newSyntax)
{
if (!CompressionWorker.SupportsDecompression(this.TransferSyntax.Compression))
{
return(false);
}
if (!CompressionWorker.SupportsCompression(newSyntax.Compression))
{
return(false);
}
return(true);
}
