1 /*=========================================================================
4 Module: $RCSfile: TestCopyRescaleDicom.cxx,v $
6 Date: $Date: 2005/01/21 11:40:54 $
7 Version: $Revision: 1.8 $
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 =========================================================================*/
19 #include "gdcmFileHelper.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::File *originalH = new gdcm::File( filename );
47 gdcm::File *copyH = new gdcm::File( );
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 File !)
54 // Waiting for a 'clean' solution, I keep the method ...JPRx
57 //////////////// Step 2:
59 // Copy of the header content
60 gdcm::DocEntry* d = originalH->GetFirstEntry();
63 if ( gdcm::BinEntry* b = dynamic_cast<gdcm::BinEntry*>(d) )
65 copyH->ReplaceOrCreate(
72 else if ( gdcm::ValEntry* v = dynamic_cast<gdcm::ValEntry*>(d) )
74 copyH->ReplaceOrCreate(
82 // We skip pb of SQ recursive exploration
85 d=originalH->GetNextEntry();
88 gdcm::FileHelper *original = new gdcm::FileHelper( originalH );
89 gdcm::FileHelper *copy = new gdcm::FileHelper( copyH );
91 size_t dataSize = original->GetImageDataSize();
94 uint8_t *rescaleImage;
96 const std::string & bitsStored = originalH->GetEntry(0x0028,0x0101);
97 if( bitsStored == "16" )
99 std::cout << "Rescale...";
100 copyH->ReplaceOrCreate( "8", 0x0028, 0x0100); // BitsAllocated
101 copyH->ReplaceOrCreate( "8", 0x0028, 0x0101); // BitsStored
102 copyH->ReplaceOrCreate( "7", 0x0028, 0x0102); // HighBit
103 copyH->ReplaceOrCreate( "0", 0x0028, 0x0103); //Pixel Representation
105 // We assume the value were from 0 to uint16_t max
106 rescaleSize = dataSize / 2;
107 rescaleImage = new uint8_t[dataSize];
109 uint16_t* imageData16 = (uint16_t*)original->GetImageData();
110 for(unsigned int i=0; i<rescaleSize; i++)
112 rescaleImage[i] = imageData16[i]/256;
117 std::cout << "Same...";
118 rescaleSize = dataSize;
119 rescaleImage = new uint8_t[dataSize];
120 memcpy(rescaleImage,original->GetImageData(),dataSize);
123 copy->SetImageData(rescaleImage, rescaleSize);
125 //////////////// Step 3:
127 copy->SetWriteModeToRGB();
128 if( !copy->WriteDcmExplVR(output) )
130 std::cout << " Failed" << std::endl
131 << " " << output << " not written" << std::endl;
137 delete[] rescaleImage;
145 //////////////// Step 4:
147 copy = new gdcm::FileHelper( output );
149 //Is the file written still gdcm parsable ?
150 if ( !copy->GetFile()->IsReadable() )
152 std::cout << " Failed" << std::endl
153 << " " << output << " not readable" << std::endl;
157 delete[] rescaleImage;
162 //////////////// Step 5:
164 size_t dataSizeWritten = copy->GetImageDataSize();
165 uint8_t* imageDataWritten = copy->GetImageData();
167 if (originalH->GetXSize() != copy->GetFile()->GetXSize() ||
168 originalH->GetYSize() != copy->GetFile()->GetYSize() ||
169 originalH->GetZSize() != copy->GetFile()->GetZSize())
171 std::cout << "Failed" << std::endl
172 << " X Size differs: "
173 << "X: " << originalH->GetXSize() << " # "
174 << copy->GetFile()->GetXSize() << " | "
175 << "Y: " << originalH->GetYSize() << " # "
176 << copy->GetFile()->GetYSize() << " | "
177 << "Z: " << originalH->GetZSize() << " # "
178 << copy->GetFile()->GetZSize() << std::endl;
182 delete[] rescaleImage;
187 if (rescaleSize != dataSizeWritten)
189 std::cout << " Failed" << std::endl
190 << " Pixel areas lengths differ: "
191 << dataSize << " # " << dataSizeWritten << std::endl;
196 delete[] rescaleImage;
201 if (int res = memcmp(rescaleImage, imageDataWritten, rescaleSize) !=0)
204 std::cout << " Failed" << std::endl
205 << " Pixel differ (as expanded in memory)." << std::endl;
210 delete[] rescaleImage;
214 std::cout << "OK." << std::endl ;
219 delete[] rescaleImage;
224 // Here we load a gdcmFile and then try to create from scratch a copy of it,
225 // copying field by field the dicom image
227 int TestCopyRescaleDicom(int argc, char* argv[])
231 // The test is specified a specific filename, use it instead of looping
233 const std::string input = argv[1];
234 const std::string reference = argv[2];
235 return CopyRescaleDicom( input, reference );
237 else if ( argc > 3 || argc == 2 )
239 std::cout << " Usage: " << argv[0]
240 << " (no arguments needed)." << std::endl;
241 std::cout << "or Usage: " << argv[0]
242 << " filename.dcm reference.dcm" << std::endl;
247 std::cout << " Description (Test::TestCopyDicom): "
249 std::cout << " For all images in gdcmData (and not blacklisted in "
250 "Test/CMakeLists.txt)"
252 std::cout << " apply the following to each filename.xxx: "
254 std::cout << " step 1: parse the image (as gdcmFile) and call"
255 << " IsReadable(). After that, call GetImageData() and "
256 << "GetImageDataSize() "
258 std::cout << " step 2: create a copy of the readed file and the new"
259 << " pixel datas are set to the copy"
261 std::cout << " step 3: write the copy of the image"
263 std::cout << " step 4: read the copy and call IsReadable()"
265 std::cout << " step 5: compare (in memory with memcmp) that the two "
266 << "images " << std::endl
267 << " match (as expanded by gdcm)." << std::endl;
268 std::cout << std::endl;
271 int retVal = 0; //by default this is an error
272 while( gdcmDataImages[i] != 0 )
274 std::string filename = GDCM_DATA_ROOT;
275 filename += "/"; //doh!
276 filename += gdcmDataImages[i];
278 std::string output = "output.dcm";
280 if( CopyRescaleDicom( filename, output ) != 0 )