1 /*=========================================================================
4 Module: $RCSfile: gdcmPixelReadConvert.cxx,v $
6 Date: $Date: 2005/06/22 07:52:32 $
7 Version: $Revision: 1.69 $
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 "gdcmPixelReadConvert.h"
20 #include "gdcmDebug.h"
22 #include "gdcmGlobal.h"
24 #include "gdcmDocEntry.h"
25 #include "gdcmRLEFramesInfo.h"
26 #include "gdcmJPEGFragmentsInfo.h"
29 #include <stdio.h> //for sscanf
34 //bool ReadMPEGFile (std::ifstream *fp, void *image_buffer, size_t lenght);
35 bool gdcm_read_JPEG2000_file (void* raw,
36 char *inputdata, size_t inputlength);
37 //-----------------------------------------------------------------------------
38 #define str2num(str, typeNum) *((typeNum *)(str))
40 //-----------------------------------------------------------------------------
41 // Constructor / Destructor
43 PixelReadConvert::PixelReadConvert()
55 /// Canonical Destructor
56 PixelReadConvert::~PixelReadConvert()
61 //-----------------------------------------------------------------------------
64 * \brief Predicate to know whether the image[s] (once Raw) is RGB.
65 * \note See comments of \ref ConvertHandleColor
67 bool PixelReadConvert::IsRawRGB()
70 || PlanarConfiguration == 2
78 * \brief Gets various usefull informations from the file header
79 * @param file gdcm::File pointer
81 void PixelReadConvert::GrabInformationsFromFile( File *file )
83 // Number of Bits Allocated for storing a Pixel is defaulted to 16
84 // when absent from the file.
85 BitsAllocated = file->GetBitsAllocated();
86 if ( BitsAllocated == 0 )
91 // Number of "Bits Stored", defaulted to number of "Bits Allocated"
92 // when absent from the file.
93 BitsStored = file->GetBitsStored();
94 if ( BitsStored == 0 )
96 BitsStored = BitsAllocated;
99 // High Bit Position, defaulted to "Bits Allocated" - 1
100 HighBitPosition = file->GetHighBitPosition();
101 if ( HighBitPosition == 0 )
103 HighBitPosition = BitsAllocated - 1;
106 XSize = file->GetXSize();
107 YSize = file->GetYSize();
108 ZSize = file->GetZSize();
109 SamplesPerPixel = file->GetSamplesPerPixel();
110 PixelSize = file->GetPixelSize();
111 PixelSign = file->IsSignedPixelData();
112 SwapCode = file->GetSwapCode();
113 std::string ts = file->GetTransferSyntax();
115 ( ! file->IsDicomV3() )
116 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ImplicitVRLittleEndian
117 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ImplicitVRLittleEndianDLXGE
118 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ExplicitVRLittleEndian
119 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ExplicitVRBigEndian
120 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::DeflatedExplicitVRLittleEndian;
122 IsMPEG = Global::GetTS()->IsMPEG(ts);
123 IsJPEG2000 = Global::GetTS()->IsJPEG2000(ts);
124 IsJPEGLS = Global::GetTS()->IsJPEGLS(ts);
125 IsJPEGLossy = Global::GetTS()->IsJPEGLossy(ts);
126 IsJPEGLossless = Global::GetTS()->IsJPEGLossless(ts);
127 IsRLELossless = Global::GetTS()->IsRLELossless(ts);
129 PixelOffset = file->GetPixelOffset();
130 PixelDataLength = file->GetPixelAreaLength();
131 RLEInfo = file->GetRLEInfo();
132 JPEGInfo = file->GetJPEGInfo();
134 IsMonochrome = file->IsMonochrome();
135 IsMonochrome1 = file->IsMonochrome1();
136 IsPaletteColor = file->IsPaletteColor();
137 IsYBRFull = file->IsYBRFull();
139 PlanarConfiguration = file->GetPlanarConfiguration();
141 /////////////////////////////////////////////////////////////////
143 HasLUT = file->HasLUT();
146 // Just in case some access to a File element requires disk access.
147 LutRedDescriptor = file->GetEntryValue( 0x0028, 0x1101 );
148 LutGreenDescriptor = file->GetEntryValue( 0x0028, 0x1102 );
149 LutBlueDescriptor = file->GetEntryValue( 0x0028, 0x1103 );
151 // Depending on the value of Document::MAX_SIZE_LOAD_ELEMENT_VALUE
152 // [ refer to invocation of Document::SetMaxSizeLoadEntry() in
153 // Document::Document() ], the loading of the value (content) of a
154 // [Bin|Val]Entry occurence migth have been hindered (read simply NOT
155 // loaded). Hence, we first try to obtain the LUTs data from the file
156 // and when this fails we read the LUTs data directly from disk.
157 // \TODO Reading a [Bin|Val]Entry directly from disk is a kludge.
158 // We should NOT bypass the [Bin|Val]Entry class. Instead
159 // an access to an UNLOADED content of a [Bin|Val]Entry occurence
160 // (e.g. BinEntry::GetBinArea()) should force disk access from
161 // within the [Bin|Val]Entry class itself. The only problem
162 // is that the [Bin|Val]Entry is unaware of the FILE* is was
163 // parsed from. Fix that. FIXME.
166 file->LoadEntryBinArea(0x0028, 0x1201);
167 LutRedData = (uint8_t*)file->GetEntryBinArea( 0x0028, 0x1201 );
170 gdcmWarningMacro( "Unable to read Red Palette Color Lookup Table data" );
174 file->LoadEntryBinArea(0x0028, 0x1202);
175 LutGreenData = (uint8_t*)file->GetEntryBinArea(0x0028, 0x1202 );
178 gdcmWarningMacro( "Unable to read Green Palette Color Lookup Table data" );
182 file->LoadEntryBinArea(0x0028, 0x1203);
183 LutBlueData = (uint8_t*)file->GetEntryBinArea( 0x0028, 0x1203 );
186 gdcmWarningMacro( "Unable to read Blue Palette Color Lookup Table data" );
190 ComputeRawAndRGBSizes();
193 /// \brief Reads from disk and decompresses Pixels
194 bool PixelReadConvert::ReadAndDecompressPixelData( std::ifstream *fp )
196 // ComputeRawAndRGBSizes is already made by
197 // ::GrabInformationsFromfile. So, the structure sizes are
201 //////////////////////////////////////////////////
202 //// First stage: get our hands on the Pixel Data.
205 gdcmWarningMacro( "Unavailable file pointer." );
209 fp->seekg( PixelOffset, std::ios::beg );
210 if( fp->fail() || fp->eof())
212 gdcmWarningMacro( "Unable to find PixelOffset in file." );
218 //////////////////////////////////////////////////
219 //// Second stage: read from disk and decompress.
220 if ( BitsAllocated == 12 )
222 ReadAndDecompress12BitsTo16Bits( fp);
226 // This problem can be found when some obvious informations are found
227 // after the field containing the image data. In this case, these
228 // bad data are added to the size of the image (in the PixelDataLength
229 // variable). But RawSize is the right size of the image !
230 if( PixelDataLength != RawSize)
232 gdcmWarningMacro( "Mismatch between PixelReadConvert : "
233 << PixelDataLength << " and RawSize : " << RawSize );
235 if( PixelDataLength > RawSize)
237 fp->read( (char*)Raw, RawSize);
241 fp->read( (char*)Raw, PixelDataLength);
244 if ( fp->fail() || fp->eof())
246 gdcmWarningMacro( "Reading of Raw pixel data failed." );
250 else if ( IsRLELossless )
252 if ( ! RLEInfo->DecompressRLEFile( fp, Raw, XSize, YSize, ZSize, BitsAllocated ) )
254 gdcmWarningMacro( "RLE decompressor failed." );
260 //gdcmWarningMacro( "Sorry, MPEG not yet taken into account" );
262 //ReadMPEGFile(fp, Raw, PixelDataLength); // fp has already been seek to start of mpeg
267 // Default case concerns JPEG family
268 if ( ! ReadAndDecompressJPEGFile( fp ) )
270 gdcmWarningMacro( "JPEG decompressor failed." );
275 ////////////////////////////////////////////
276 //// Third stage: twigle the bytes and bits.
277 ConvertReorderEndianity();
278 ConvertReArrangeBits();
279 ConvertFixGreyLevels();
280 ConvertHandleColor();
285 /// Deletes Pixels Area
286 void PixelReadConvert::Squeeze()
302 * \brief Build the RGB image from the Raw image and the LUTs.
304 bool PixelReadConvert::BuildRGBImage()
308 // The job is already done.
314 // The job can't be done
321 // The job can't be done
325 gdcmWarningMacro( "--> BuildRGBImage" );
331 if( BitsAllocated <= 8 )
333 uint8_t *localRGB = RGB;
334 for (size_t i = 0; i < RawSize; ++i )
337 *localRGB++ = LutRGBA[j];
338 *localRGB++ = LutRGBA[j+1];
339 *localRGB++ = LutRGBA[j+2];
343 else // deal with 16 bits pixels and 16 bits Palette color
345 uint16_t *localRGB = (uint16_t *)RGB;
346 for (size_t i = 0; i < RawSize/2; ++i )
348 j = ((uint16_t *)Raw)[i] * 4;
349 *localRGB++ = ((uint16_t *)LutRGBA)[j];
350 *localRGB++ = ((uint16_t *)LutRGBA)[j+1];
351 *localRGB++ = ((uint16_t *)LutRGBA)[j+2];
358 //-----------------------------------------------------------------------------
361 //-----------------------------------------------------------------------------
364 * \brief Read from file a 12 bits per pixel image and decompress it
365 * into a 16 bits per pixel image.
367 void PixelReadConvert::ReadAndDecompress12BitsTo16Bits( std::ifstream *fp )
368 throw ( FormatError )
370 int nbPixels = XSize * YSize;
371 uint16_t *localDecompres = (uint16_t*)Raw;
373 for( int p = 0; p < nbPixels; p += 2 )
377 fp->read( (char*)&b0, 1);
378 if ( fp->fail() || fp->eof() )
380 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
381 "Unfound first block" );
384 fp->read( (char*)&b1, 1 );
385 if ( fp->fail() || fp->eof())
387 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
388 "Unfound second block" );
391 fp->read( (char*)&b2, 1 );
392 if ( fp->fail() || fp->eof())
394 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
395 "Unfound second block" );
398 // Two steps are necessary to please VC++
400 // 2 pixels 12bit = [0xABCDEF]
401 // 2 pixels 16bit = [0x0ABD] + [0x0FCE]
403 *localDecompres++ = ((b0 >> 4) << 8) + ((b0 & 0x0f) << 4) + (b1 & 0x0f);
405 *localDecompres++ = ((b2 & 0x0f) << 8) + ((b1 >> 4) << 4) + (b2 >> 4);
407 /// \todo JPR Troubles expected on Big-Endian processors ?
412 * \brief Reads from disk the Pixel Data of JPEG Dicom encapsulated
413 * file and decompress it.
414 * @param fp File Pointer
417 bool PixelReadConvert::ReadAndDecompressJPEGFile( std::ifstream *fp )
421 // make sure this is the right JPEG compression
422 assert( !IsJPEGLossless || !IsJPEGLossy || !IsJPEGLS );
423 // FIXME this is really ugly but it seems I have to load the complete
424 // jpeg2000 stream to use jasper:
425 // I don't think we'll ever be able to deal with multiple fragments properly
427 unsigned long inputlength = 0;
428 JPEGFragment *jpegfrag = JPEGInfo->GetFirstFragment();
431 inputlength += jpegfrag->GetLength();
432 jpegfrag = JPEGInfo->GetNextFragment();
434 gdcmAssertMacro( inputlength != 0);
435 uint8_t *inputdata = new uint8_t[inputlength];
436 char *pinputdata = (char*)inputdata;
437 jpegfrag = JPEGInfo->GetFirstFragment();
440 fp->seekg( jpegfrag->GetOffset(), std::ios::beg);
441 fp->read(pinputdata, jpegfrag->GetLength());
442 pinputdata += jpegfrag->GetLength();
443 jpegfrag = JPEGInfo->GetNextFragment();
445 // Warning the inputdata buffer is delete in the function
446 if ( ! gdcm_read_JPEG2000_file( Raw,
447 (char*)inputdata, inputlength ) )
451 // wow what happen, must be an error
456 // make sure this is the right JPEG compression
457 assert( !IsJPEGLossless || !IsJPEGLossy || !IsJPEG2000 );
458 // WARNING : JPEG-LS is NOT the 'classical' Jpeg Lossless :
459 // [JPEG-LS is the basis for new lossless/near-lossless compression
460 // standard for continuous-tone images intended for JPEG2000. The standard
461 // is based on the LOCO-I algorithm (LOw COmplexity LOssless COmpression
462 // for Images) developed at Hewlett-Packard Laboratories]
464 // see http://datacompression.info/JPEGLS.shtml
467 std::cerr << "count:" << JPEGInfo->GetFragmentCount() << std::endl;
468 unsigned long inputlength = 0;
469 JPEGFragment *jpegfrag = JPEGInfo->GetFirstFragment();
472 inputlength += jpegfrag->GetLength();
473 jpegfrag = JPEGInfo->GetNextFragment();
475 gdcmAssertMacro( inputlength != 0);
476 uint8_t *inputdata = new uint8_t[inputlength];
477 char *pinputdata = (char*)inputdata;
478 jpegfrag = JPEGInfo->GetFirstFragment();
481 fp->seekg( jpegfrag->GetOffset(), std::ios::beg);
482 fp->read(pinputdata, jpegfrag->GetLength());
483 pinputdata += jpegfrag->GetLength();
484 jpegfrag = JPEGInfo->GetNextFragment();
487 //fp->read((char*)Raw, PixelDataLength);
489 std::ofstream out("/tmp/jpegls.jpg");
490 out.write((char*)inputdata, inputlength);
495 gdcmWarningMacro( "Sorry, JPEG-LS not yet taken into account" );
496 fp->seekg( JPEGInfo->GetFirstFragment()->GetOffset(), std::ios::beg);
497 // if ( ! gdcm_read_JPEGLS_file( fp,Raw ) )
502 // make sure this is the right JPEG compression
503 assert( !IsJPEGLS || !IsJPEG2000 );
504 // Precompute the offset localRaw will be shifted with
505 int length = XSize * YSize * SamplesPerPixel;
506 int numberBytes = BitsAllocated / 8;
508 JPEGInfo->DecompressFromFile(fp, Raw, BitsStored, numberBytes, length );
514 * \brief Build Red/Green/Blue/Alpha LUT from File
515 * when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
516 * and (0028,1101),(0028,1102),(0028,1102)
517 * - xxx Palette Color Lookup Table Descriptor - are found
518 * and (0028,1201),(0028,1202),(0028,1202)
519 * - xxx Palette Color Lookup Table Data - are found
520 * \warning does NOT deal with :
521 * 0028 1100 Gray Lookup Table Descriptor (Retired)
522 * 0028 1221 Segmented Red Palette Color Lookup Table Data
523 * 0028 1222 Segmented Green Palette Color Lookup Table Data
524 * 0028 1223 Segmented Blue Palette Color Lookup Table Data
525 * no known Dicom reader deals with them :-(
526 * @return a RGBA Lookup Table
528 void PixelReadConvert::BuildLUTRGBA()
535 // http://www.barre.nom.fr/medical/dicom2/limitations.html#Color%20Lookup%20Tables
537 if ( ! IsPaletteColor )
542 if ( LutRedDescriptor == GDCM_UNFOUND
543 || LutGreenDescriptor == GDCM_UNFOUND
544 || LutBlueDescriptor == GDCM_UNFOUND )
546 gdcmWarningMacro( "(At least) a LUT Descriptor is missing" );
550 ////////////////////////////////////////////
551 // Extract the info from the LUT descriptors
552 int lengthR; // Red LUT length in Bytes
553 int debR; // Subscript of the first Lut Value
554 int nbitsR; // Lut item size (in Bits)
555 int nbRead; // nb of items in LUT descriptor (must be = 3)
557 nbRead = sscanf( LutRedDescriptor.c_str(),
559 &lengthR, &debR, &nbitsR );
562 gdcmWarningMacro( "Wrong Red LUT descriptor" );
564 int lengthG; // Green LUT length in Bytes
565 int debG; // Subscript of the first Lut Value
566 int nbitsG; // Lut item size (in Bits)
568 nbRead = sscanf( LutGreenDescriptor.c_str(),
570 &lengthG, &debG, &nbitsG );
573 gdcmWarningMacro( "Wrong Green LUT descriptor" );
576 int lengthB; // Blue LUT length in Bytes
577 int debB; // Subscript of the first Lut Value
578 int nbitsB; // Lut item size (in Bits)
579 nbRead = sscanf( LutRedDescriptor.c_str(),
581 &lengthB, &debB, &nbitsB );
584 gdcmWarningMacro( "Wrong Blue LUT descriptor" );
587 gdcmWarningMacro(" lengthR " << lengthR << " debR "
588 << debR << " nbitsR " << nbitsR);
589 gdcmWarningMacro(" lengthG " << lengthG << " debG "
590 << debG << " nbitsG " << nbitsG);
591 gdcmWarningMacro(" lengthB " << lengthB << " debB "
592 << debB << " nbitsB " << nbitsB);
594 if( !lengthR ) // if = 2^16, this shall be 0 see : CP-143
596 if( !lengthG ) // if = 2^16, this shall be 0
598 if( !lengthB ) // if = 2^16, this shall be 0
601 ////////////////////////////////////////////////////////
603 if( ( ! LutRedData ) || ( ! LutGreenData ) || ( ! LutBlueData ) )
605 gdcmWarningMacro( "(At least) a LUT is missing" );
609 // -------------------------------------------------------------
611 if( BitsAllocated <= 8 )
613 // forge the 4 * 8 Bits Red/Green/Blue/Alpha LUT
614 LutRGBA = new uint8_t[ 1024 ]; // 256 * 4 (R, G, B, Alpha)
619 memset( LutRGBA, 0, 1024 );
622 if( ( nbitsR == 16 ) && ( BitsAllocated == 8 ) )
624 // when LUT item size is different than pixel size
625 mult = 2; // high byte must be = low byte
629 // See PS 3.3-2003 C.11.1.1.2 p 619
633 // if we get a black image, let's just remove the '+1'
634 // from 'i*mult+1' and check again
635 // if it works, we shall have to check the 3 Palettes
636 // to see which byte is ==0 (first one, or second one)
638 // We give up the checking to avoid some (useless ?) overhead
639 // (optimistic asumption)
643 //take "Subscript of the first Lut Value" (debR,debG,debB) into account!
645 //FIXME : +1 : to get 'low value' byte
646 // Trouble expected on Big Endian Processors ?
647 // 16 BIts Per Pixel Palette Color to be swapped?
649 a = LutRGBA + 0 + debR;
650 for( i=0; i < lengthR; ++i )
652 *a = LutRedData[i*mult+1];
656 a = LutRGBA + 1 + debG;
657 for( i=0; i < lengthG; ++i)
659 *a = LutGreenData[i*mult+1];
663 a = LutRGBA + 2 + debB;
664 for(i=0; i < lengthB; ++i)
666 *a = LutBlueData[i*mult+1];
671 for(i=0; i < 256; ++i)
673 *a = 1; // Alpha component
679 // Probabely the same stuff is to be done for 16 Bits Pixels
680 // with 65536 entries LUT ?!?
681 // Still looking for accurate info on the web :-(
683 gdcmWarningMacro( "Sorry Palette Color Lookup Tables not yet dealt with"
684 << " for 16 Bits Per Pixel images" );
686 // forge the 4 * 16 Bits Red/Green/Blue/Alpha LUT
688 LutRGBA = (uint8_t *)new uint16_t[ 65536*4 ]; // 2^16 * 4 (R, G, B, Alpha)
691 memset( LutRGBA, 0, 65536*4*2 ); // 16 bits = 2 bytes ;-)
693 LutItemNumber = 65536;
699 //take "Subscript of the first Lut Value" (debR,debG,debB) into account!
701 a16 = (uint16_t*)LutRGBA + 0 + debR;
702 for( i=0; i < lengthR; ++i )
704 *a16 = ((uint16_t*)LutRedData)[i];
708 a16 = (uint16_t*)LutRGBA + 1 + debG;
709 for( i=0; i < lengthG; ++i)
711 *a16 = ((uint16_t*)LutGreenData)[i];
715 a16 = (uint16_t*)LutRGBA + 2 + debB;
716 for(i=0; i < lengthB; ++i)
718 *a16 = ((uint16_t*)LutBlueData)[i];
722 a16 = (uint16_t*)LutRGBA + 3 ;
723 for(i=0; i < 65536; ++i)
725 *a16 = 1; // Alpha component
728 /* Just to 'see' the LUT, at debug time
730 a16=(uint16_t*)LutRGBA;
731 for (int j=0;j<65536;j++)
733 std::cout << *a16 << " " << *(a16+1) << " "
734 << *(a16+2) << " " << *(a16+3) << std::endl;
742 * \brief Swap the bytes, according to \ref SwapCode.
744 void PixelReadConvert::ConvertSwapZone()
748 if( BitsAllocated == 16 )
750 uint16_t *im16 = (uint16_t*)Raw;
758 for( i = 0; i < RawSize / 2; i++ )
760 im16[i]= (im16[i] >> 8) | (im16[i] << 8 );
764 gdcmWarningMacro("SwapCode value (16 bits) not allowed.");
767 else if( BitsAllocated == 32 )
772 uint32_t *im32 = (uint32_t*)Raw;
778 for( i = 0; i < RawSize / 4; i++ )
780 low = im32[i] & 0x0000ffff; // 4321
781 high = im32[i] >> 16;
782 high = ( high >> 8 ) | ( high << 8 );
783 low = ( low >> 8 ) | ( low << 8 );
785 im32[i] = ( s32 << 16 ) | high;
789 for( i = 0; i < RawSize / 4; i++ )
791 low = im32[i] & 0x0000ffff; // 2143
792 high = im32[i] >> 16;
793 high = ( high >> 8 ) | ( high << 8 );
794 low = ( low >> 8 ) | ( low << 8 );
796 im32[i] = ( s32 << 16 ) | low;
800 for( i = 0; i < RawSize / 4; i++ )
802 low = im32[i] & 0x0000ffff; // 3412
803 high = im32[i] >> 16;
805 im32[i] = ( s32 << 16 ) | high;
809 gdcmWarningMacro("SwapCode value (32 bits) not allowed." );
815 * \brief Deal with endianness i.e. re-arange bytes inside the integer
817 void PixelReadConvert::ConvertReorderEndianity()
819 if ( BitsAllocated != 8 )
824 // Special kludge in order to deal with xmedcon broken images:
825 if ( BitsAllocated == 16
826 && BitsStored < BitsAllocated
829 int l = (int)( RawSize / ( BitsAllocated / 8 ) );
830 uint16_t *deb = (uint16_t *)Raw;
831 for(int i = 0; i<l; i++)
843 * \brief Deal with Grey levels i.e. re-arange them
844 * to have low values = dark, high values = bright
846 void PixelReadConvert::ConvertFixGreyLevels()
851 uint32_t i; // to please M$VC6
856 if ( BitsAllocated == 8 )
858 uint8_t *deb = (uint8_t *)Raw;
859 for (i=0; i<RawSize; i++)
867 if ( BitsAllocated == 16 )
870 for (j=0; j<BitsStored-1; j++)
872 mask = (mask << 1) +1; // will be fff when BitsStored=12
875 uint16_t *deb = (uint16_t *)Raw;
876 for (i=0; i<RawSize/2; i++)
886 if ( BitsAllocated == 8 )
888 uint8_t smask8 = 255;
889 uint8_t *deb = (uint8_t *)Raw;
890 for (i=0; i<RawSize; i++)
892 *deb = smask8 - *deb;
897 if ( BitsAllocated == 16 )
899 uint16_t smask16 = 65535;
900 uint16_t *deb = (uint16_t *)Raw;
901 for (i=0; i<RawSize/2; i++)
903 *deb = smask16 - *deb;
912 * \brief Re-arrange the bits within the bytes.
913 * @return Boolean always true
915 bool PixelReadConvert::ConvertReArrangeBits() throw ( FormatError )
917 if ( BitsStored != BitsAllocated )
919 int l = (int)( RawSize / ( BitsAllocated / 8 ) );
920 if ( BitsAllocated == 16
922 // pmask : to mask the 'unused bits' (may contain overlays)
923 uint16_t pmask = 0xffff;
924 pmask = pmask >> ( BitsAllocated - BitsStored );
926 uint16_t *deb = (uint16_t*)Raw;
930 for(int i = 0; i<l; i++)
932 *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & pmask;
938 // smask : to check the 'sign' when BitsStored != BitsAllocated
939 uint16_t smask = 0x8000;
940 smask = smask >> ( BitsAllocated - BitsStored );
941 // nmask : to propagate sign bit on negative values
942 int16_t nmask = 0x8000;
943 nmask = nmask >> ( BitsAllocated - BitsStored );
945 for(int i = 0; i<l; i++)
947 *deb = *deb >> (BitsStored - HighBitPosition - 1);
956 else if ( BitsAllocated == 32 )
958 // pmask : to mask the 'unused bits' (may contain overlays)
959 uint32_t pmask = 0xffffffff;
960 pmask = pmask >> ( BitsAllocated - BitsStored );
962 uint32_t *deb = (uint32_t*)Raw;
966 for(int i = 0; i<l; i++)
968 *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & pmask;
974 // smask : to check the 'sign' when BitsStored != BitsAllocated
975 uint32_t smask = 0x80000000;
976 smask = smask >> ( BitsAllocated - BitsStored );
977 // nmask : to propagate sign bit on negative values
978 int32_t nmask = 0x80000000;
979 nmask = nmask >> ( BitsAllocated - BitsStored )
981 for(int i = 0; i<l; i++)
983 *deb = *deb >> (BitsStored - HighBitPosition - 1);
994 gdcmWarningMacro("Weird image (BitsAllocated !=8, 12, 16, 32)");
995 throw FormatError( "Weird image !?" );
1002 * \brief Convert (Red plane, Green plane, Blue plane) to RGB pixels
1003 * \warning Works on all the frames at a time
1005 void PixelReadConvert::ConvertRGBPlanesToRGBPixels()
1007 gdcmWarningMacro("--> ConvertRGBPlanesToRGBPixels");
1009 uint8_t *localRaw = Raw;
1010 uint8_t *copyRaw = new uint8_t[ RawSize ];
1011 memmove( copyRaw, localRaw, RawSize );
1013 int l = XSize * YSize * ZSize;
1015 uint8_t *a = copyRaw;
1016 uint8_t *b = copyRaw + l;
1017 uint8_t *c = copyRaw + l + l;
1019 for (int j = 0; j < l; j++)
1021 *(localRaw++) = *(a++);
1022 *(localRaw++) = *(b++);
1023 *(localRaw++) = *(c++);
1029 * \brief Convert (cY plane, cB plane, cR plane) to RGB pixels
1030 * \warning Works on all the frames at a time
1032 void PixelReadConvert::ConvertYcBcRPlanesToRGBPixels()
1034 // Remarks for YBR newbees :
1035 // YBR_FULL works very much like RGB, i.e. three samples per pixel,
1036 // just the color space is YCbCr instead of RGB. This is particularly useful
1037 // for doppler ultrasound where most of the image is grayscale
1038 // (i.e. only populates the Y components) and Cb and Cr are mostly zero,
1039 // except for the few patches of color on the image.
1040 // On such images, RLE achieves a compression ratio that is much better
1041 // than the compression ratio on an equivalent RGB image.
1043 gdcmWarningMacro("--> ConvertYcBcRPlanesToRGBPixels");
1045 uint8_t *localRaw = Raw;
1046 uint8_t *copyRaw = new uint8_t[ RawSize ];
1047 memmove( copyRaw, localRaw, RawSize );
1049 // to see the tricks about YBR_FULL, YBR_FULL_422,
1050 // YBR_PARTIAL_422, YBR_ICT, YBR_RCT have a look at :
1051 // ftp://medical.nema.org/medical/dicom/final/sup61_ft.pdf
1052 // and be *very* affraid
1054 int l = XSize * YSize;
1055 int nbFrames = ZSize;
1057 uint8_t *a = copyRaw + 0;
1058 uint8_t *b = copyRaw + l;
1059 uint8_t *c = copyRaw + l+ l;
1062 /// We replaced easy to understand but time consuming floating point
1063 /// computations by the 'well known' integer computation counterpart
1065 /// http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf
1066 /// for code optimisation.
1068 for ( int i = 0; i < nbFrames; i++ )
1070 for ( int j = 0; j < l; j++ )
1072 R = 38142 *(*a-16) + 52298 *(*c -128);
1073 G = 38142 *(*a-16) - 26640 *(*c -128) - 12845 *(*b -128);
1074 B = 38142 *(*a-16) + 66093 *(*b -128);
1083 if (R > 255) R = 255;
1084 if (G > 255) G = 255;
1085 if (B > 255) B = 255;
1087 *(localRaw++) = (uint8_t)R;
1088 *(localRaw++) = (uint8_t)G;
1089 *(localRaw++) = (uint8_t)B;
1098 /// \brief Deals with the color decoding i.e. handle:
1099 /// - R, G, B planes (as opposed to RGB pixels)
1100 /// - YBR (various) encodings.
1101 /// - LUT[s] (or "PALETTE COLOR").
1103 void PixelReadConvert::ConvertHandleColor()
1105 //////////////////////////////////
1106 // Deal with the color decoding i.e. handle:
1107 // - R, G, B planes (as opposed to RGB pixels)
1108 // - YBR (various) encodings.
1109 // - LUT[s] (or "PALETTE COLOR").
1111 // The classification in the color decoding schema is based on the blending
1112 // of two Dicom tags values:
1113 // * "Photometric Interpretation" for which we have the cases:
1114 // - [Photo A] MONOCHROME[1|2] pictures,
1115 // - [Photo B] RGB or YBR_FULL_422 (which acts as RGB),
1116 // - [Photo C] YBR_* (with the above exception of YBR_FULL_422)
1117 // - [Photo D] "PALETTE COLOR" which indicates the presence of LUT[s].
1118 // * "Planar Configuration" for which we have the cases:
1119 // - [Planar 0] 0 then Pixels are already RGB
1120 // - [Planar 1] 1 then we have 3 planes : R, G, B,
1121 // - [Planar 2] 2 then we have 1 gray Plane and 3 LUTs
1123 // Now in theory, one could expect some coherence when blending the above
1124 // cases. For example we should not encounter files belonging at the
1125 // time to case [Planar 0] and case [Photo D].
1126 // Alas, this was only theory ! Because in practice some odd (read ill
1127 // formated Dicom) files (e.g. gdcmData/US-PAL-8-10x-echo.dcm) we encounter:
1128 // - "Planar Configuration" = 0,
1129 // - "Photometric Interpretation" = "PALETTE COLOR".
1130 // Hence gdcm will use the folowing "heuristic" in order to be tolerant
1131 // towards Dicom-non-conformant files:
1132 // << whatever the "Planar Configuration" value might be, a
1133 // "Photometric Interpretation" set to "PALETTE COLOR" forces
1134 // a LUT intervention >>
1136 // Now we are left with the following handling of the cases:
1137 // - [Planar 0] OR [Photo A] no color decoding (since respectively
1138 // Pixels are already RGB and monochrome pictures have no color :),
1139 // - [Planar 1] AND [Photo B] handled with ConvertRGBPlanesToRGBPixels()
1140 // - [Planar 1] AND [Photo C] handled with ConvertYcBcRPlanesToRGBPixels()
1141 // - [Planar 2] OR [Photo D] requires LUT intervention.
1143 gdcmWarningMacro("--> ConvertHandleColor"
1144 << "Planar Configuration " << PlanarConfiguration );
1148 // [Planar 2] OR [Photo D]: LUT intervention done outside
1149 gdcmWarningMacro("--> RawRGB : LUT intervention done outside");
1153 if ( PlanarConfiguration == 1 )
1157 // [Planar 1] AND [Photo C] (remember YBR_FULL_422 acts as RGB)
1158 gdcmWarningMacro("--> YBRFull");
1159 ConvertYcBcRPlanesToRGBPixels();
1163 // [Planar 1] AND [Photo C]
1164 gdcmWarningMacro("--> YBRFull");
1165 ConvertRGBPlanesToRGBPixels();
1170 // When planarConf is 0, and RLELossless (forbidden by Dicom norm)
1171 // pixels need to be RGB-fyied anyway
1175 gdcmWarningMacro("--> RLE Lossless");
1176 ConvertRGBPlanesToRGBPixels();
1179 // In *normal *case, when planarConf is 0, pixels are already in RGB
1182 /// Computes the Pixels Size
1183 void PixelReadConvert::ComputeRawAndRGBSizes()
1185 int bitsAllocated = BitsAllocated;
1186 // Number of "Bits Allocated" is fixed to 16 when it's 12, since
1187 // in this case we will expand the image to 16 bits (see
1188 // \ref ReadAndDecompress12BitsTo16Bits() )
1189 if ( BitsAllocated == 12 )
1194 RawSize = XSize * YSize * ZSize
1195 * ( bitsAllocated / 8 )
1199 RGBSize = 3 * RawSize; // works for 8 and 16 bits per Pixel
1207 /// Allocates room for RGB Pixels
1208 void PixelReadConvert::AllocateRGB()
1212 RGB = new uint8_t[RGBSize];
1215 /// Allocates room for RAW Pixels
1216 void PixelReadConvert::AllocateRaw()
1220 Raw = new uint8_t[RawSize];
1223 //-----------------------------------------------------------------------------
1226 * \brief Print self.
1227 * @param indent Indentation string to be prepended during printing.
1228 * @param os Stream to print to.
1230 void PixelReadConvert::Print( std::ostream &os, std::string const &indent )
1233 << "--- Pixel information -------------------------"
1236 << "Pixel Data: offset " << PixelOffset
1237 << " x(" << std::hex << PixelOffset << std::dec
1238 << ") length " << PixelDataLength
1239 << " x(" << std::hex << PixelDataLength << std::dec
1240 << ")" << std::endl;
1242 if ( IsRLELossless )
1246 RLEInfo->Print( os, indent );
1250 gdcmWarningMacro("Set as RLE file but NO RLEinfo present.");
1254 if ( IsJPEG2000 || IsJPEGLossless || IsJPEGLossy || IsJPEGLS )
1258 JPEGInfo->Print( os, indent );
1262 gdcmWarningMacro("Set as JPEG file but NO JPEGinfo present.");
1267 //-----------------------------------------------------------------------------
1268 } // end namespace gdcm
1270 // NOTES on File internal calls
1272 // ---> GetImageData
1273 // ---> GetImageDataIntoVector
1274 // |---> GetImageDataIntoVectorRaw
1275 // | lut intervention
1277 // ---> GetImageDataRaw
1278 // ---> GetImageDataIntoVectorRaw