1 /*=========================================================================
4 Module: $RCSfile: TestCopyRescaleDicom.cxx,v $
6 Date: $Date: 2004/12/07 18:16:40 $
7 Version: $Revision: 1.2 $
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();
62 // Copy of the header content
65 if ( gdcm::BinEntry* b = dynamic_cast<gdcm::BinEntry*>(d) )
67 copyH->ReplaceOrCreateByNumber(
74 else if ( gdcm::ValEntry* v = dynamic_cast<gdcm::ValEntry*>(d) )
76 copyH->ReplaceOrCreateByNumber(
84 // We skip pb of SQ recursive exploration
87 d=originalH->GetNextEntry();
90 gdcm::File *original = new gdcm::File( originalH );
91 gdcm::File *copy = new gdcm::File( copyH );
93 size_t dataSize = original->GetImageDataSize();
94 uint8_t* imageData = original->GetImageData();
97 uint8_t *rescaleImage;
99 const std::string & bitsStored = originalH->GetEntryByNumber(0x0028,0x0101);
100 if( bitsStored == "16" )
102 std::cout << "Rescale...";
103 copyH->ReplaceOrCreateByNumber( "8", 0x0028, 0x0100); // BitsAllocated
104 copyH->ReplaceOrCreateByNumber( "8", 0x0028, 0x0101); // BitsStored
105 copyH->ReplaceOrCreateByNumber( "7", 0x0028, 0x0102); // HighBit
106 copyH->ReplaceOrCreateByNumber( "0", 0x0028, 0x0103); //Pixel Representation
108 // We assume the value were from 0 to uint16_t max
109 rescaleSize = dataSize / 2;
110 rescaleImage = new uint8_t[dataSize];
112 uint16_t* imageData16 = (uint16_t*)original->GetImageData();
113 for(unsigned int i=0; i<rescaleSize; i++)
115 rescaleImage[i] = imageData16[i]/256;
120 std::cout << "Same...";
121 rescaleSize = dataSize;
122 rescaleImage = new uint8_t[dataSize];
123 memcpy(rescaleImage,original->GetImageData(),dataSize);
126 copy->SetImageData(rescaleImage, rescaleSize);
128 //////////////// Step 3:
130 copy->SetWriteModeToRGB();
131 if( !copy->WriteDcmExplVR(output) )
133 std::cout << " Failed" << std::endl
134 << " " << output << " not written" << std::endl;
140 delete[] rescaleImage;
148 //////////////// Step 4:
150 copy = new gdcm::File( output );
152 //Is the file written still gdcm parsable ?
153 if ( !copy->GetHeader()->IsReadable() )
155 std::cout << " Failed" << std::endl
156 << " " << output << " not readable" << std::endl;
160 delete[] rescaleImage;
165 //////////////// Step 5:
167 size_t dataSizeWritten = copy->GetImageDataSize();
168 uint8_t* imageDataWritten = copy->GetImageData();
170 if (originalH->GetXSize() != copy->GetHeader()->GetXSize() ||
171 originalH->GetYSize() != copy->GetHeader()->GetYSize() ||
172 originalH->GetZSize() != copy->GetHeader()->GetZSize())
174 std::cout << "Failed" << std::endl
175 << " X Size differs: "
176 << "X: " << originalH->GetXSize() << " # "
177 << copy->GetHeader()->GetXSize() << " | "
178 << "Y: " << originalH->GetYSize() << " # "
179 << copy->GetHeader()->GetYSize() << " | "
180 << "Z: " << originalH->GetZSize() << " # "
181 << copy->GetHeader()->GetZSize() << std::endl;
185 delete[] rescaleImage;
190 if (rescaleSize != dataSizeWritten)
192 std::cout << " Failed" << std::endl
193 << " Pixel areas lengths differ: "
194 << dataSize << " # " << dataSizeWritten << std::endl;
199 delete[] rescaleImage;
204 if (int res = memcmp(rescaleImage, imageDataWritten, rescaleSize) !=0)
207 std::cout << " Failed" << std::endl
208 << " Pixel differ (as expanded in memory)." << std::endl;
213 delete[] rescaleImage;
217 std::cout << "OK." << std::endl ;
222 delete[] rescaleImage;
227 // Here we load a gdcmFile and then try to create from scratch a copy of it,
228 // copying field by field the dicom image
230 int TestCopyRescaleDicom(int argc, char* argv[])
234 // The test is specified a specific filename, use it instead of looping
236 const std::string input = argv[1];
237 const std::string reference = argv[2];
238 return CopyRescaleDicom( input, reference );
240 else if ( argc > 3 || argc == 2 )
242 std::cout << " Usage: " << argv[0]
243 << " (no arguments needed)." << std::endl;
244 std::cout << "or Usage: " << argv[0]
245 << " filename.dcm reference.dcm" << std::endl;
250 std::cout << " Description (Test::TestCopyDicom): "
252 std::cout << " For all images in gdcmData (and not blacklisted in "
253 "Test/CMakeLists.txt)"
255 std::cout << " apply the following to each filename.xxx: "
257 std::cout << " step 1: parse the image (as gdcmHeader) and call"
258 << " IsReadable(). After that, call GetImageData() and "
259 << "GetImageDataSize() "
261 std::cout << " step 2: create a copy of the readed file and the new"
262 << " pixel datas are set to the copy"
264 std::cout << " step 3: write the copy of the image"
266 std::cout << " step 4: read the copy and call IsReadable()"
268 std::cout << " step 5: compare (in memory with memcmp) that the two "
269 << "images " << std::endl
270 << " match (as expanded by gdcm)." << std::endl;
271 std::cout << std::endl;
274 int retVal = 0; //by default this is an error
275 while( gdcmDataImages[i] != 0 )
277 std::string filename = GDCM_DATA_ROOT;
278 filename += "/"; //doh!
279 filename += gdcmDataImages[i];
281 std::string output = "output.dcm";
283 if( CopyRescaleDicom( filename, output ) != 0 )