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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmReader.h"
#include "gdcmWriter.h"
#include "gdcmAttribute.h"
#include "gdcmFileExplicitFilter.h"
#include "gdcmSequenceOfItems.h"
/**
* This example is used to generate the file:
*
* gdcmConformanceTests/RTStruct_VRDSAsVRUN.dcm
*
* This is an advanced example. Its goal is to explain one dark corner of DICOM PS 3.10
* file format. The idea is that when writting an Attribute in an Explicit Transfer
* Syntax one, cannot always use V:DS for writing a VR:DS attribute since dong so
* would imply using a VL:16bits.
* This example shows that converting from Implicit to Explicit should preserver VR:UN
* when the VL is larger than 16bits limit.
*
* Usage:
* ./LargeVRDSExplicit gdcmDataExtra/gdcmNonImageData/RT/RTStruct.dcm out.dcm
*/
bool interpolate(const double * pts, size_t npts, std::vector<double> &out )
{
out.clear();
for(size_t i = 0; i < 2*npts; ++i )
{
const size_t j = i / 2;
if( i % 2 )
{
if( j != npts - 1 )
{
assert( 3*j+5 < 3*npts );
const double midpointx = (pts[3*j+0] + pts[3*j+3]) / 2;
const double midpointy = (pts[3*j+1] + pts[3*j+4]) / 2;
const double midpointz = (pts[3*j+2] + pts[3*j+5]) / 2;
out.push_back( midpointx );
out.push_back( midpointy );
out.push_back( midpointz );
}
}
else
{
assert( j < npts );
out.push_back( pts[3*j+0] );
out.push_back( pts[3*j+1] );
out.push_back( pts[3*j+2] );
}
}
assert( out.size() == 2 * npts * 3 - 3 );
return true;
}
int main(int argc, char *argv[])
{
if( argc < 3 )
{
std::cerr << argv[0] << " input.dcm output.dcm" << std::endl;
return 1;
}
const char *filename = argv[1];
const char *outfilename = argv[2];
gdcm::Reader reader;
reader.SetFileName( filename );
if( !reader.Read() )
{
return 1;
}
gdcm::File &file = reader.GetFile();
gdcm::DataSet &ds = file.GetDataSet();
gdcm::FileExplicitFilter fef;
//fef.SetChangePrivateTags( changeprivatetags );
fef.SetFile( reader.GetFile() );
if( !fef.Change() )
{
std::cerr << "Failed to change: " << filename << std::endl;
return 1;
}
// (3006,0039) SQ (Sequence with undefined length #=4) # u/l, 1 ROIContourSequence
gdcm::Tag tag(0x3006,0x0039);
const gdcm::DataElement &roicsq = ds.GetDataElement( tag );
gdcm::SmartPointer<gdcm::SequenceOfItems> sqi = roicsq.GetValueAsSQ();
//sqi->SetNumberOfItems( 1 );
const gdcm::Item & item = sqi->GetItem(1); // Item start at #1
const gdcm::DataSet& nestedds = item.GetNestedDataSet();
gdcm::Tag tcsq(0x3006,0x0040);
if( !nestedds.FindDataElement( tcsq ) )
{
return 0;
}
const gdcm::DataElement& csq = nestedds.GetDataElement( tcsq );
gdcm::SmartPointer<gdcm::SequenceOfItems> sqi2 = csq.GetValueAsSQ();
if( !sqi2 || !sqi2->GetNumberOfItems() )
{
return 0;
}
//unsigned int nitems = sqi2->GetNumberOfItems();
gdcm::Item & item2 = sqi2->GetItem(1); // Item start at #1
gdcm::DataSet& nestedds2 = item2.GetNestedDataSet();
//item2.SetVLToUndefined();
//std::cout << nestedds2 << std::endl;
// (3006,0050) DS [43.57636\65.52504\-10.0\46.043102\62.564945\-10.0\49.126537\60.714... # 398,48 ContourData
gdcm::Tag tcontourdata(0x3006,0x0050);
const gdcm::DataElement & contourdata = nestedds2.GetDataElement( tcontourdata );
//std::cout << contourdata << std::endl;
//const gdcm::ByteValue *bv = contourdata.GetByteValue();
gdcm::Attribute<0x3006,0x0046> ncontourpoints;
ncontourpoints.Set( nestedds2 );
gdcm::Attribute<0x3006,0x0050> at;
at.SetFromDataElement( contourdata );
const double* pts = at.GetValues();
unsigned int npts = at.GetNumberOfValues() / 3;
std::vector<double> out( pts, pts + npts * 3 );
std::vector<double> out2;
//const unsigned int niter = 7;
const unsigned int niter = 8;
for( unsigned int i = 0; i < niter; ++i)
{
//bool b =
interpolate(&out[0], out.size() / 3, out2);
//const double *pout = &out[0];
out = out2;
out2.clear();
}
assert( out.size() % 3 == 0 );
gdcm::Attribute<0x3006,0x0050> at_interpolate;
at_interpolate.SetNumberOfValues( (unsigned int)(out.size() / 3) );
at_interpolate.SetValues( &out[0], (uint32_t)out.size() );
ncontourpoints.SetValue( at_interpolate.GetNumberOfValues() / 3 );
nestedds2.Replace( at_interpolate.GetAsDataElement() );
nestedds2.Replace( ncontourpoints.GetAsDataElement() );
//assert(0);
// Let's take item one and subdivide it
gdcm::TransferSyntax ts = gdcm::TransferSyntax::ImplicitVRLittleEndian;
ts = gdcm::TransferSyntax::ExplicitVRLittleEndian;
gdcm::FileMetaInformation &fmi = file.GetHeader();
const char *tsuid = gdcm::TransferSyntax::GetTSString( ts );
// const char * is ok since padding is \0 anyway...
gdcm::DataElement de( gdcm::Tag(0x0002,0x0010) );
de.SetByteValue( tsuid, (uint32_t)strlen(tsuid) );
de.SetVR( gdcm::Attribute<0x0002, 0x0010>::GetVR() );
fmi.Replace( de );
fmi.Remove( gdcm::Tag(0x0002,0x0012) ); // will be regenerated
fmi.Remove( gdcm::Tag(0x0002,0x0013) ); // ' ' '
fmi.SetDataSetTransferSyntax(ts);
gdcm::Writer w;
w.SetFile( file );
w.SetFileName( outfilename );
if (!w.Write() )
{
return 1;
}
return 0;
}
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