1 /*=========================================================================
4 Module: $RCSfile: TestCopyRescaleDicom.cxx,v $
6 Date: $Date: 2005/02/09 15:06:48 $
7 Version: $Revision: 1.15 $
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 *originalF = new gdcm::File( filename );
47 gdcm::File *copyF = new gdcm::File( );
49 //First of all copy the file, field by field
51 //////////////// Step 2:
53 // Copy of the file content
54 gdcm::DocEntry *d = originalF->GetFirstEntry();
57 if ( gdcm::BinEntry *b = dynamic_cast<gdcm::BinEntry*>(d) )
59 copyF->InsertBinEntry( b->GetBinArea(),b->GetLength(),
60 b->GetGroup(),b->GetElement(),
63 else if ( gdcm::ValEntry *v = dynamic_cast<gdcm::ValEntry*>(d) )
65 copyF->InsertValEntry( v->GetValue(),
66 v->GetGroup(),v->GetElement(),
71 // We skip pb of SQ recursive exploration
74 d=originalF->GetNextEntry();
77 gdcm::FileHelper *original = new gdcm::FileHelper( originalF );
78 gdcm::FileHelper *copy = new gdcm::FileHelper( copyF );
80 size_t dataSize = original->GetImageDataSize();
83 uint8_t *rescaleImage;
85 const std::string &bitsStored = originalF->GetEntryValue(0x0028,0x0101);
86 if( bitsStored == "16" )
88 std::cout << "Rescale...";
89 copyF->InsertValEntry( "8", 0x0028, 0x0100); // Bits Allocated
90 copyF->InsertValEntry( "8", 0x0028, 0x0101); // Bits Stored
91 copyF->InsertValEntry( "7", 0x0028, 0x0102); // High Bit
92 copyF->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 uint16_t *tmpImage = imageData16;
100 uint8_t *tmpRescale = rescaleImage;
101 for(unsigned int i=0; i<rescaleSize; i++)
103 *tmpRescale = (*tmpImage)>>8;
110 std::cout << "Same...";
111 rescaleSize = dataSize;
112 rescaleImage = new uint8_t[dataSize];
113 memcpy(rescaleImage,original->GetImageData(),dataSize);
116 copy->SetImageData(rescaleImage, rescaleSize);
118 //////////////// Step 3:
120 copy->SetWriteModeToRGB();
121 if( !copy->WriteDcmExplVR(output) )
123 std::cout << " Failed" << std::endl
124 << " " << output << " not written" << std::endl;
130 delete[] rescaleImage;
138 //////////////// Step 4:
140 copy = new gdcm::FileHelper( output );
142 //Is the file written still gdcm parsable ?
143 if ( !copy->GetFile()->IsReadable() )
145 std::cout << " Failed" << std::endl
146 << " " << output << " not readable" << std::endl;
150 delete[] rescaleImage;
155 //////////////// Step 5:
157 size_t dataSizeWritten = copy->GetImageDataSize();
158 uint8_t *imageDataWritten = copy->GetImageData();
160 if (originalF->GetXSize() != copy->GetFile()->GetXSize() ||
161 originalF->GetYSize() != copy->GetFile()->GetYSize() ||
162 originalF->GetZSize() != copy->GetFile()->GetZSize())
164 std::cout << "Failed" << std::endl
165 << " X Size differs: "
166 << "X: " << originalF->GetXSize() << " # "
167 << copy->GetFile()->GetXSize() << " | "
168 << "Y: " << originalF->GetYSize() << " # "
169 << copy->GetFile()->GetYSize() << " | "
170 << "Z: " << originalF->GetZSize() << " # "
171 << copy->GetFile()->GetZSize() << std::endl;
175 delete[] rescaleImage;
180 if (rescaleSize != dataSizeWritten)
182 std::cout << " Failed" << std::endl
183 << " Pixel areas lengths differ: "
184 << dataSize << " # " << dataSizeWritten << std::endl;
189 delete[] rescaleImage;
194 if (int res = memcmp(rescaleImage, imageDataWritten, rescaleSize) !=0)
197 std::cout << " Failed" << std::endl
198 << " Pixel differ (as expanded in memory)." << std::endl;
203 delete[] rescaleImage;
207 std::cout << "OK." << std::endl ;
212 delete[] rescaleImage;
217 // Here we load a gdcmFile and then try to create from scratch a copy of it,
218 // copying field by field the dicom image
220 int TestCopyRescaleDicom(int argc, char *argv[])
224 // The test is specified a specific filename, use it instead of looping
226 const std::string input = argv[1];
227 const std::string reference = argv[2];
228 return CopyRescaleDicom( input, reference );
230 else if ( argc > 3 || argc == 2 )
232 std::cout << " Usage: " << argv[0]
233 << " (no arguments needed)." << std::endl;
234 std::cout << "or Usage: " << argv[0]
235 << " filename.dcm reference.dcm" << std::endl;
240 std::cout << " Description (Test::TestCopyDicom): "
242 std::cout << " For all images in gdcmData (and not blacklisted in "
243 "Test/CMakeLists.txt)"
245 std::cout << " apply the following to each filename.xxx: "
247 std::cout << " step 1: parse the image (as gdcmFile) and call"
248 << " IsReadable(). After that, call GetImageData() and "
249 << "GetImageDataSize() "
251 std::cout << " step 2: create a copy of the readed file and the new"
252 << " pixel data are set to the copy"
254 std::cout << " step 3: write the copy of the image"
256 std::cout << " step 4: read the copy and call IsReadable()"
258 std::cout << " step 5: compare (in memory with memcmp) that the two "
259 << "images " << std::endl
260 << " match (as expanded by gdcm)." << std::endl;
261 std::cout << std::endl;
264 int retVal = 0; //by default this is an error
265 while( gdcmDataImages[i] != 0 )
267 std::string filename = GDCM_DATA_ROOT;
268 filename += "/"; //doh!
269 filename += gdcmDataImages[i];
271 std::string output = "output.dcm";
273 if( CopyRescaleDicom( filename, output ) != 0 )