--- /dev/null
+/*=========================================================================
+
+ Program: gdcm
+ Module: $RCSfile: TestCopyRescaleDicom.cxx,v $
+ Language: C++
+ Date: $Date: 2004/12/07 16:55:56 $
+ Version: $Revision: 1.1 $
+
+ Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
+ l'Image). All rights reserved. See Doc/License.txt or
+ http://www.creatis.insa-lyon.fr/Public/Gdcm/License.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 notices for more information.
+
+=========================================================================*/
+#include "gdcmHeader.h"
+#include "gdcmFile.h"
+#include "gdcmValEntry.h"
+#include "gdcmBinEntry.h"
+
+//Generated file:
+#include "gdcmDataImages.h"
+
+bool FileExists(const char* filename);
+
+bool RemoveFile(const char* source);
+
+int CopyRescaleDicom(std::string const & filename,
+ std::string const & output )
+{
+ std::cout << " Testing: " << filename << std::endl;
+ if( FileExists( output.c_str() ) )
+ {
+ // std::cerr << "Don't try to cheat, I am removing the file anyway" << std::endl;
+ if( !RemoveFile( output.c_str() ) )
+ {
+ std::cout << "Ouch, the file exist, but I cannot remove it" << std::endl;
+ return 1;
+ }
+ }
+
+ //////////////// Step 1:
+ std::cout << " 1...";
+ gdcm::Header *originalH = new gdcm::Header( filename );
+ gdcm::Header *copyH = new gdcm::Header( );
+
+ //First of all copy the header field by field
+
+ // Warning :Accessor gdcmElementSet::GetEntry() should not exist
+ // It was commented out by Mathieu, that was a *good* idea
+ // (the user does NOT have to know the way we implemented the Header !)
+ // Waiting for a 'clean' solution, I keep the method ...JPRx
+
+
+ //////////////// Step 2:
+ std::cout << "2...";
+ originalH->Initialize();
+ gdcm::DocEntry* d = originalH->GetNextEntry();
+
+ while(d)
+ {
+ if ( gdcm::ValEntry* v = dynamic_cast<gdcm::ValEntry*>(d) )
+ {
+ copyH->ReplaceOrCreateByNumber(
+ v->GetValue(),
+ v->GetGroup(),
+ v->GetElement(),
+ v->GetVR() );
+ }
+
+ d=originalH->GetNextEntry();
+ }
+
+ gdcm::File *original = new gdcm::File( originalH );
+ gdcm::File *copy = new gdcm::File( copyH );
+
+ size_t dataSize = original->GetImageDataSize();
+ uint8_t* imageData = original->GetImageData();
+
+ size_t rescaleSize = dataSize / 2;
+#ifdef VERSION_1
+ uint8_t *rescaleImage = new uint8_t[dataSize];
+#endif
+
+ //2 case now, if 16 bits input then try to downscale to 8bits just for
+ //fun:
+
+ const std::string & bitsStored = originalH->GetEntryByNumber(0x0028,0x0101);
+// std::cout << "BitsStored: " << bitsStored << std::endl;
+
+ if( bitsStored == "16" )
+ {
+ uint16_t* imageData16 = (uint16_t*)original->GetImageData();
+ copyH->ReplaceOrCreateByNumber( "8", 0x0028, 0x0100); // BitsAllocated
+ copyH->ReplaceOrCreateByNumber( "8", 0x0028, 0x0101); // BitsStored
+ copyH->ReplaceOrCreateByNumber( "7", 0x0028, 0x0102); // HighBit
+ copyH->ReplaceOrCreateByNumber( "0", 0x0028, 0x0103); //Pixel Representation
+
+ // We assume the value were from 0 to uint16_t max
+ for(unsigned int i=0; i<rescaleSize; i++)
+ {
+#ifdef VERSION_1
+ rescaleImage[i] = imageData16[i]/256;
+#else
+ imageData[i] = imageData16[i]/256;
+#endif
+ }
+#ifdef VERSION_1
+ copy->SetImageData(rescaleImage, rescaleSize);
+#endif
+ }
+ else
+ {
+ copy->SetImageData(imageData, dataSize);
+ }
+
+ //////////////// Step 3:
+ std::cout << "3...";
+ copy->SetWriteModeToRGB();
+ if( !copy->WriteDcmExplVR(output) )
+ {
+ std::cout << " Failed" << std::endl
+ << " " << output << " not written" << std::endl;
+
+ delete original;
+ delete copy;
+ delete originalH;
+ delete copyH;
+
+ return 1;
+ }
+
+ delete copy;
+ delete copyH;
+
+ //////////////// Step 4:
+ std::cout << "4...";
+ copy = new gdcm::File( output );
+
+ //Is the file written still gdcm parsable ?
+ if ( !copy->GetHeader()->IsReadable() )
+ {
+ std::cout << " Failed" << std::endl
+ << " " << output << " not readable" << std::endl;
+
+ delete original;
+ delete originalH;
+
+ return 1;
+ }
+
+ //////////////// Step 5:
+ std::cout << "5...";
+ size_t dataSizeWritten = copy->GetImageDataSize();
+ uint8_t* imageDataWritten = copy->GetImageData();
+
+ if (dataSize != dataSizeWritten)
+ {
+ std::cout << " Failed" << std::endl
+ << " Pixel areas lengths differ: "
+ << dataSize << " # " << dataSizeWritten << std::endl;
+
+ delete original;
+ delete copy;
+ delete originalH;
+
+ return 1;
+ }
+
+ if (int res = memcmp(imageData, imageDataWritten, dataSize) !=0)
+ {
+ (void)res;
+ std::cout << " Failed" << std::endl
+ << " Pixel differ (as expanded in memory)." << std::endl;
+
+ delete original;
+ delete copy;
+ delete originalH;
+
+ return 1;
+ }
+ std::cout << "OK." << std::endl ;
+
+ delete original;
+ delete copy;
+ delete originalH;
+#ifdef VERSION_1
+ delete[] rescaleImage;
+#endif
+
+ return 0;
+}
+
+// Here we load a gdcmFile and then try to create from scratch a copy of it,
+// copying field by field the dicom image
+
+int TestCopyRescaleDicom(int argc, char* argv[])
+{
+ if ( argc == 3 )
+ {
+ // The test is specified a specific filename, use it instead of looping
+ // over all images
+ const std::string input = argv[1];
+ const std::string reference = argv[2];
+ return CopyRescaleDicom( input, reference );
+ }
+ else if ( argc > 3 || argc == 2 )
+ {
+ std::cout << " Usage: " << argv[0]
+ << " (no arguments needed)." << std::endl;
+ std::cout << "or Usage: " << argv[0]
+ << " filename.dcm reference.dcm" << std::endl;
+ return 1;
+ }
+ // else other cases:
+
+ std::cout << " Description (Test::TestCopyDicom): "
+ << std::endl;
+ std::cout << " For all images in gdcmData (and not blacklisted in "
+ "Test/CMakeLists.txt)"
+ << std::endl;
+ std::cout << " apply the following to each filename.xxx: "
+ << std::endl;
+ std::cout << " step 1: parse the image (as gdcmHeader) and call"
+ << " IsReadable(). After that, call GetImageData() and "
+ << "GetImageDataSize() "
+ << std::endl;
+ std::cout << " step 2: create a copy of the readed file and the new"
+ << " pixel datas are set to the copy"
+ << std::endl;
+ std::cout << " step 3: write the copy of the image"
+ << std::endl;
+ std::cout << " step 4: read the copy and call IsReadable()"
+ << std::endl;
+ std::cout << " step 5: compare (in memory with memcmp) that the two "
+ << "images " << std::endl
+ << " match (as expanded by gdcm)." << std::endl;
+ std::cout << std::endl;
+
+ int i =0;
+ int retVal = 0; //by default this is an error
+ while( gdcmDataImages[i] != 0 )
+ {
+ std::string filename = GDCM_DATA_ROOT;
+ filename += "/"; //doh!
+ filename += gdcmDataImages[i];
+
+ std::string output = "output.dcm";
+
+ if( CopyRescaleDicom( filename, output ) != 0 )
+ {
+ retVal++;
+ }
+
+ i++;
+ }
+ return retVal;
+}
+
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