1 /*=========================================================================
4 Module: $RCSfile: TestCopyRescaleDicom.cxx,v $
6 Date: $Date: 2004/12/07 16:55:56 $
7 Version: $Revision: 1.1 $
9 Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
10 l'Image). All rights reserved. See Doc/License.txt or
11 http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details.
13 This software is distributed WITHOUT ANY WARRANTY; without even
14 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 PURPOSE. See the above copyright notices for more information.
17 =========================================================================*/
18 #include "gdcmHeader.h"
20 #include "gdcmValEntry.h"
21 #include "gdcmBinEntry.h"
24 #include "gdcmDataImages.h"
26 bool FileExists(const char* filename);
28 bool RemoveFile(const char* source);
30 int CopyRescaleDicom(std::string const & filename,
31 std::string const & output )
33 std::cout << " Testing: " << filename << std::endl;
34 if( FileExists( output.c_str() ) )
36 // std::cerr << "Don't try to cheat, I am removing the file anyway" << std::endl;
37 if( !RemoveFile( output.c_str() ) )
39 std::cout << "Ouch, the file exist, but I cannot remove it" << std::endl;
44 //////////////// Step 1:
46 gdcm::Header *originalH = new gdcm::Header( filename );
47 gdcm::Header *copyH = new gdcm::Header( );
49 //First of all copy the header field by field
51 // Warning :Accessor gdcmElementSet::GetEntry() should not exist
52 // It was commented out by Mathieu, that was a *good* idea
53 // (the user does NOT have to know the way we implemented the Header !)
54 // Waiting for a 'clean' solution, I keep the method ...JPRx
57 //////////////// Step 2:
59 originalH->Initialize();
60 gdcm::DocEntry* d = originalH->GetNextEntry();
64 if ( gdcm::ValEntry* v = dynamic_cast<gdcm::ValEntry*>(d) )
66 copyH->ReplaceOrCreateByNumber(
73 d=originalH->GetNextEntry();
76 gdcm::File *original = new gdcm::File( originalH );
77 gdcm::File *copy = new gdcm::File( copyH );
79 size_t dataSize = original->GetImageDataSize();
80 uint8_t* imageData = original->GetImageData();
82 size_t rescaleSize = dataSize / 2;
84 uint8_t *rescaleImage = new uint8_t[dataSize];
87 //2 case now, if 16 bits input then try to downscale to 8bits just for
90 const std::string & bitsStored = originalH->GetEntryByNumber(0x0028,0x0101);
91 // std::cout << "BitsStored: " << bitsStored << std::endl;
93 if( bitsStored == "16" )
95 uint16_t* imageData16 = (uint16_t*)original->GetImageData();
96 copyH->ReplaceOrCreateByNumber( "8", 0x0028, 0x0100); // BitsAllocated
97 copyH->ReplaceOrCreateByNumber( "8", 0x0028, 0x0101); // BitsStored
98 copyH->ReplaceOrCreateByNumber( "7", 0x0028, 0x0102); // HighBit
99 copyH->ReplaceOrCreateByNumber( "0", 0x0028, 0x0103); //Pixel Representation
101 // We assume the value were from 0 to uint16_t max
102 for(unsigned int i=0; i<rescaleSize; i++)
105 rescaleImage[i] = imageData16[i]/256;
107 imageData[i] = imageData16[i]/256;
111 copy->SetImageData(rescaleImage, rescaleSize);
116 copy->SetImageData(imageData, dataSize);
119 //////////////// Step 3:
121 copy->SetWriteModeToRGB();
122 if( !copy->WriteDcmExplVR(output) )
124 std::cout << " Failed" << std::endl
125 << " " << output << " not written" << std::endl;
138 //////////////// Step 4:
140 copy = new gdcm::File( output );
142 //Is the file written still gdcm parsable ?
143 if ( !copy->GetHeader()->IsReadable() )
145 std::cout << " Failed" << std::endl
146 << " " << output << " not readable" << std::endl;
154 //////////////// Step 5:
156 size_t dataSizeWritten = copy->GetImageDataSize();
157 uint8_t* imageDataWritten = copy->GetImageData();
159 if (dataSize != dataSizeWritten)
161 std::cout << " Failed" << std::endl
162 << " Pixel areas lengths differ: "
163 << dataSize << " # " << dataSizeWritten << std::endl;
172 if (int res = memcmp(imageData, imageDataWritten, dataSize) !=0)
175 std::cout << " Failed" << std::endl
176 << " Pixel differ (as expanded in memory)." << std::endl;
184 std::cout << "OK." << std::endl ;
190 delete[] rescaleImage;
196 // Here we load a gdcmFile and then try to create from scratch a copy of it,
197 // copying field by field the dicom image
199 int TestCopyRescaleDicom(int argc, char* argv[])
203 // The test is specified a specific filename, use it instead of looping
205 const std::string input = argv[1];
206 const std::string reference = argv[2];
207 return CopyRescaleDicom( input, reference );
209 else if ( argc > 3 || argc == 2 )
211 std::cout << " Usage: " << argv[0]
212 << " (no arguments needed)." << std::endl;
213 std::cout << "or Usage: " << argv[0]
214 << " filename.dcm reference.dcm" << std::endl;
219 std::cout << " Description (Test::TestCopyDicom): "
221 std::cout << " For all images in gdcmData (and not blacklisted in "
222 "Test/CMakeLists.txt)"
224 std::cout << " apply the following to each filename.xxx: "
226 std::cout << " step 1: parse the image (as gdcmHeader) and call"
227 << " IsReadable(). After that, call GetImageData() and "
228 << "GetImageDataSize() "
230 std::cout << " step 2: create a copy of the readed file and the new"
231 << " pixel datas are set to the copy"
233 std::cout << " step 3: write the copy of the image"
235 std::cout << " step 4: read the copy and call IsReadable()"
237 std::cout << " step 5: compare (in memory with memcmp) that the two "
238 << "images " << std::endl
239 << " match (as expanded by gdcm)." << std::endl;
240 std::cout << std::endl;
243 int retVal = 0; //by default this is an error
244 while( gdcmDataImages[i] != 0 )
246 std::string filename = GDCM_DATA_ROOT;
247 filename += "/"; //doh!
248 filename += gdcmDataImages[i];
250 std::string output = "output.dcm";
252 if( CopyRescaleDicom( filename, output ) != 0 )