1 /*=========================================================================
4 Module: $RCSfile: TestCopyRescaleDicom.cxx,v $
6 Date: $Date: 2005/01/25 15:44:22 $
7 Version: $Revision: 1.11 $
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 //////////////// Step 2:
53 // Copy of the header content
54 gdcm::DocEntry* d = originalH->GetFirstEntry();
57 if ( gdcm::BinEntry* b = dynamic_cast<gdcm::BinEntry*>(d) )
59 copyH->InsertBinEntry( b->GetBinArea(),b->GetLength(),
60 b->GetGroup(),b->GetElement(),
63 else if ( gdcm::ValEntry* v = dynamic_cast<gdcm::ValEntry*>(d) )
65 copyH->InsertValEntry( v->GetValue(),
66 v->GetGroup(),v->GetElement(),
71 // We skip pb of SQ recursive exploration
74 d=originalH->GetNextEntry();
77 gdcm::FileHelper *original = new gdcm::FileHelper( originalH );
78 gdcm::FileHelper *copy = new gdcm::FileHelper( copyH );
80 size_t dataSize = original->GetImageDataSize();
83 uint8_t *rescaleImage;
85 const std::string & bitsStored = originalH->GetEntryValue(0x0028,0x0101);
86 if( bitsStored == "16" )
88 std::cout << "Rescale...";
89 copyH->InsertValEntry( "8", 0x0028, 0x0100); // BitsAllocated
90 copyH->InsertValEntry( "8", 0x0028, 0x0101); // BitsStored
91 copyH->InsertValEntry( "7", 0x0028, 0x0102); // HighBit
92 copyH->InsertValEntry( "0", 0x0028, 0x0103); //Pixel Representation
94 // We assume the value were from 0 to uint16_t max
95 rescaleSize = dataSize / 2;
96 rescaleImage = new uint8_t[dataSize];
98 uint16_t* imageData16 = (uint16_t*)original->GetImageData();
99 for(unsigned int i=0; i<rescaleSize; i++)
101 rescaleImage[i] = imageData16[i]/256;
106 std::cout << "Same...";
107 rescaleSize = dataSize;
108 rescaleImage = new uint8_t[dataSize];
109 memcpy(rescaleImage,original->GetImageData(),dataSize);
112 copy->SetImageData(rescaleImage, rescaleSize);
114 //////////////// Step 3:
116 copy->SetWriteModeToRGB();
117 if( !copy->WriteDcmExplVR(output) )
119 std::cout << " Failed" << std::endl
120 << " " << output << " not written" << std::endl;
126 delete[] rescaleImage;
134 //////////////// Step 4:
136 copy = new gdcm::FileHelper( output );
138 //Is the file written still gdcm parsable ?
139 if ( !copy->GetFile()->IsReadable() )
141 std::cout << " Failed" << std::endl
142 << " " << output << " not readable" << std::endl;
146 delete[] rescaleImage;
151 //////////////// Step 5:
153 size_t dataSizeWritten = copy->GetImageDataSize();
154 uint8_t* imageDataWritten = copy->GetImageData();
156 if (originalH->GetXSize() != copy->GetFile()->GetXSize() ||
157 originalH->GetYSize() != copy->GetFile()->GetYSize() ||
158 originalH->GetZSize() != copy->GetFile()->GetZSize())
160 std::cout << "Failed" << std::endl
161 << " X Size differs: "
162 << "X: " << originalH->GetXSize() << " # "
163 << copy->GetFile()->GetXSize() << " | "
164 << "Y: " << originalH->GetYSize() << " # "
165 << copy->GetFile()->GetYSize() << " | "
166 << "Z: " << originalH->GetZSize() << " # "
167 << copy->GetFile()->GetZSize() << std::endl;
171 delete[] rescaleImage;
176 if (rescaleSize != dataSizeWritten)
178 std::cout << " Failed" << std::endl
179 << " Pixel areas lengths differ: "
180 << dataSize << " # " << dataSizeWritten << std::endl;
185 delete[] rescaleImage;
190 if (int res = memcmp(rescaleImage, imageDataWritten, rescaleSize) !=0)
193 std::cout << " Failed" << std::endl
194 << " Pixel differ (as expanded in memory)." << std::endl;
199 delete[] rescaleImage;
203 std::cout << "OK." << std::endl ;
208 delete[] rescaleImage;
213 // Here we load a gdcmFile and then try to create from scratch a copy of it,
214 // copying field by field the dicom image
216 int TestCopyRescaleDicom(int argc, char* argv[])
220 // The test is specified a specific filename, use it instead of looping
222 const std::string input = argv[1];
223 const std::string reference = argv[2];
224 return CopyRescaleDicom( input, reference );
226 else if ( argc > 3 || argc == 2 )
228 std::cout << " Usage: " << argv[0]
229 << " (no arguments needed)." << std::endl;
230 std::cout << "or Usage: " << argv[0]
231 << " filename.dcm reference.dcm" << std::endl;
236 std::cout << " Description (Test::TestCopyDicom): "
238 std::cout << " For all images in gdcmData (and not blacklisted in "
239 "Test/CMakeLists.txt)"
241 std::cout << " apply the following to each filename.xxx: "
243 std::cout << " step 1: parse the image (as gdcmFile) and call"
244 << " IsReadable(). After that, call GetImageData() and "
245 << "GetImageDataSize() "
247 std::cout << " step 2: create a copy of the readed file and the new"
248 << " pixel datas are set to the copy"
250 std::cout << " step 3: write the copy of the image"
252 std::cout << " step 4: read the copy and call IsReadable()"
254 std::cout << " step 5: compare (in memory with memcmp) that the two "
255 << "images " << std::endl
256 << " match (as expanded by gdcm)." << std::endl;
257 std::cout << std::endl;
260 int retVal = 0; //by default this is an error
261 while( gdcmDataImages[i] != 0 )
263 std::string filename = GDCM_DATA_ROOT;
264 filename += "/"; //doh!
265 filename += gdcmDataImages[i];
267 std::string output = "output.dcm";
269 if( CopyRescaleDicom( filename, output ) != 0 )