1 /*=========================================================================
4 Module: $RCSfile: gdcmPixelReadConvert.cxx,v $
6 Date: $Date: 2005/05/30 01:30:39 $
7 Version: $Revision: 1.63 $
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 LUT data" );
174 file->LoadEntryBinArea(0x0028, 0x1202);
175 LutGreenData = (uint8_t*)file->GetEntryBinArea(0x0028, 0x1202 );
178 gdcmWarningMacro( "Unable to read Green LUT data" );
182 file->LoadEntryBinArea(0x0028, 0x1203);
183 LutBlueData = (uint8_t*)file->GetEntryBinArea( 0x0028, 0x1203 );
186 gdcmWarningMacro( "Unable to read Blue LUT 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 dans 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 imagage 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
327 uint8_t *localRGB = RGB;
328 for (size_t i = 0; i < RawSize; ++i )
331 *localRGB++ = LutRGBA[j];
332 *localRGB++ = LutRGBA[j+1];
333 *localRGB++ = LutRGBA[j+2];
338 //-----------------------------------------------------------------------------
341 //-----------------------------------------------------------------------------
344 * \brief Read from file a 12 bits per pixel image and decompress it
345 * into a 16 bits per pixel image.
347 void PixelReadConvert::ReadAndDecompress12BitsTo16Bits( std::ifstream *fp )
348 throw ( FormatError )
350 int nbPixels = XSize * YSize;
351 uint16_t *localDecompres = (uint16_t*)Raw;
353 for( int p = 0; p < nbPixels; p += 2 )
357 fp->read( (char*)&b0, 1);
358 if ( fp->fail() || fp->eof() )
360 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
361 "Unfound first block" );
364 fp->read( (char*)&b1, 1 );
365 if ( fp->fail() || fp->eof())
367 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
368 "Unfound second block" );
371 fp->read( (char*)&b2, 1 );
372 if ( fp->fail() || fp->eof())
374 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
375 "Unfound second block" );
378 // Two steps are necessary to please VC++
380 // 2 pixels 12bit = [0xABCDEF]
381 // 2 pixels 16bit = [0x0ABD] + [0x0FCE]
383 *localDecompres++ = ((b0 >> 4) << 8) + ((b0 & 0x0f) << 4) + (b1 & 0x0f);
385 *localDecompres++ = ((b2 & 0x0f) << 8) + ((b1 >> 4) << 4) + (b2 >> 4);
387 /// \todo JPR Troubles expected on Big-Endian processors ?
392 * \brief Reads from disk the Pixel Data of JPEG Dicom encapsulated
393 * file and decompress it.
394 * @param fp File Pointer
397 bool PixelReadConvert::ReadAndDecompressJPEGFile( std::ifstream *fp )
401 // FIXME this is really ugly but it seems I have to load the complete
402 // jpeg2000 stream to use jasper:
403 // I don't think we'll ever be able to deal with multiple fragments properly
405 unsigned long inputlength = 0;
406 JPEGFragment *jpegfrag = JPEGInfo->GetFirstFragment();
409 inputlength += jpegfrag->GetLength();
410 jpegfrag = JPEGInfo->GetNextFragment();
412 gdcmAssertMacro( inputlength != 0);
413 uint8_t *inputdata = new uint8_t[inputlength];
414 char *pinputdata = (char*)inputdata;
415 jpegfrag = JPEGInfo->GetFirstFragment();
418 fp->seekg( jpegfrag->GetOffset(), std::ios::beg);
419 fp->read(pinputdata, jpegfrag->GetLength());
420 pinputdata += jpegfrag->GetLength();
421 jpegfrag = JPEGInfo->GetNextFragment();
423 // Warning the inputdata buffer is delete in the function
424 if ( ! gdcm_read_JPEG2000_file( Raw,
425 (char*)inputdata, inputlength ) )
433 // WARNING : JPEG-LS is NOT the 'classical' Jpeg Lossless :
434 // [JPEG-LS is the basis for new lossless/near-lossless compression
435 // standard for continuous-tone images intended for JPEG2000. The standard
436 // is based on the LOCO-I algorithm (LOw COmplexity LOssless COmpression
437 // for Images) developed at Hewlett-Packard Laboratories]
439 // see http://datacompression.info/JPEGLS.shtml
442 gdcmWarningMacro( "Sorry, JPEG-LS not yet taken into account" );
443 fp->seekg( JPEGInfo->GetFirstFragment()->GetOffset(), std::ios::beg);
444 // if ( ! gdcm_read_JPEGLS_file( fp,Raw ) )
449 // Precompute the offset localRaw will be shifted with
450 int length = XSize * YSize * SamplesPerPixel;
451 int numberBytes = BitsAllocated / 8;
453 JPEGInfo->DecompressFromFile(fp, Raw, BitsStored, numberBytes, length );
459 * \brief Build Red/Green/Blue/Alpha LUT from File
460 * when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
461 * and (0028,1101),(0028,1102),(0028,1102)
462 * - xxx Palette Color Lookup Table Descriptor - are found
463 * and (0028,1201),(0028,1202),(0028,1202)
464 * - xxx Palette Color Lookup Table Data - are found
465 * \warning does NOT deal with :
466 * 0028 1100 Gray Lookup Table Descriptor (Retired)
467 * 0028 1221 Segmented Red Palette Color Lookup Table Data
468 * 0028 1222 Segmented Green Palette Color Lookup Table Data
469 * 0028 1223 Segmented Blue Palette Color Lookup Table Data
470 * no known Dicom reader deals with them :-(
471 * @return a RGBA Lookup Table
473 void PixelReadConvert::BuildLUTRGBA()
480 // http://www.barre.nom.fr/medical/dicom2/limitations.html#Color%20Lookup%20Tables
482 if ( ! IsPaletteColor )
487 if ( LutRedDescriptor == GDCM_UNFOUND
488 || LutGreenDescriptor == GDCM_UNFOUND
489 || LutBlueDescriptor == GDCM_UNFOUND )
494 ////////////////////////////////////////////
495 // Extract the info from the LUT descriptors
496 int lengthR; // Red LUT length in Bytes
497 int debR; // Subscript of the first Lut Value
498 int nbitsR; // Lut item size (in Bits)
499 int nbRead = sscanf( LutRedDescriptor.c_str(),
501 &lengthR, &debR, &nbitsR );
504 gdcmWarningMacro( "Wrong Red LUT descriptor" );
507 int lengthG; // Green LUT length in Bytes
508 int debG; // Subscript of the first Lut Value
509 int nbitsG; // Lut item size (in Bits)
510 nbRead = sscanf( LutGreenDescriptor.c_str(),
512 &lengthG, &debG, &nbitsG );
515 gdcmWarningMacro( "Wrong Green LUT descriptor" );
518 int lengthB; // Blue LUT length in Bytes
519 int debB; // Subscript of the first Lut Value
520 int nbitsB; // Lut item size (in Bits)
521 nbRead = sscanf( LutRedDescriptor.c_str(),
523 &lengthB, &debB, &nbitsB );
526 gdcmWarningMacro( "Wrong Blue LUT descriptor" );
529 ////////////////////////////////////////////////////////
530 if ( ( ! LutRedData ) || ( ! LutGreenData ) || ( ! LutBlueData ) )
535 ////////////////////////////////////////////////
536 // forge the 4 * 8 Bits Red/Green/Blue/Alpha LUT
537 LutRGBA = new uint8_t[ 1024 ]; // 256 * 4 (R, G, B, Alpha)
541 memset( LutRGBA, 0, 1024 );
544 if ( ( nbitsR == 16 ) && ( BitsAllocated == 8 ) )
546 // when LUT item size is different than pixel size
547 mult = 2; // high byte must be = low byte
551 // See PS 3.3-2003 C.11.1.1.2 p 619
555 // if we get a black image, let's just remove the '+1'
556 // from 'i*mult+1' and check again
557 // if it works, we shall have to check the 3 Palettes
558 // to see which byte is ==0 (first one, or second one)
560 // We give up the checking to avoid some (useless ?) overhead
561 // (optimistic asumption)
563 uint8_t *a = LutRGBA + 0;
564 for( i=0; i < lengthR; ++i )
566 *a = LutRedData[i*mult+1];
571 for( i=0; i < lengthG; ++i)
573 *a = LutGreenData[i*mult+1];
578 for(i=0; i < lengthB; ++i)
580 *a = LutBlueData[i*mult+1];
585 for(i=0; i < 256; ++i)
587 *a = 1; // Alpha component
593 * \brief Swap the bytes, according to \ref SwapCode.
595 void PixelReadConvert::ConvertSwapZone()
599 if( BitsAllocated == 16 )
601 uint16_t *im16 = (uint16_t*)Raw;
609 for( i = 0; i < RawSize / 2; i++ )
611 im16[i]= (im16[i] >> 8) | (im16[i] << 8 );
615 gdcmWarningMacro("SwapCode value (16 bits) not allowed.");
618 else if( BitsAllocated == 32 )
623 uint32_t *im32 = (uint32_t*)Raw;
629 for( i = 0; i < RawSize / 4; i++ )
631 low = im32[i] & 0x0000ffff; // 4321
632 high = im32[i] >> 16;
633 high = ( high >> 8 ) | ( high << 8 );
634 low = ( low >> 8 ) | ( low << 8 );
636 im32[i] = ( s32 << 16 ) | high;
640 for( i = 0; i < RawSize / 4; i++ )
642 low = im32[i] & 0x0000ffff; // 2143
643 high = im32[i] >> 16;
644 high = ( high >> 8 ) | ( high << 8 );
645 low = ( low >> 8 ) | ( low << 8 );
647 im32[i] = ( s32 << 16 ) | low;
651 for( i = 0; i < RawSize / 4; i++ )
653 low = im32[i] & 0x0000ffff; // 3412
654 high = im32[i] >> 16;
656 im32[i] = ( s32 << 16 ) | high;
660 gdcmWarningMacro("SwapCode value (32 bits) not allowed." );
666 * \brief Deal with endianness i.e. re-arange bytes inside the integer
668 void PixelReadConvert::ConvertReorderEndianity()
670 if ( BitsAllocated != 8 )
675 // Special kludge in order to deal with xmedcon broken images:
676 if ( BitsAllocated == 16
677 && BitsStored < BitsAllocated
680 int l = (int)( RawSize / ( BitsAllocated / 8 ) );
681 uint16_t *deb = (uint16_t *)Raw;
682 for(int i = 0; i<l; i++)
694 * \brief Deal with Grey levels i.e. re-arange them
695 * to have low values = dark, high values = bright
697 void PixelReadConvert::ConvertFixGreyLevels()
702 uint32_t i; // to please M$VC6
707 if ( BitsAllocated == 8 )
709 uint8_t *deb = (uint8_t *)Raw;
710 for (i=0; i<RawSize; i++)
718 if ( BitsAllocated == 16 )
721 for (j=0; j<BitsStored-1; j++)
723 mask = (mask << 1) +1; // will be fff when BitsStored=12
726 uint16_t *deb = (uint16_t *)Raw;
727 for (i=0; i<RawSize/2; i++)
737 if ( BitsAllocated == 8 )
739 uint8_t smask8 = 255;
740 uint8_t *deb = (uint8_t *)Raw;
741 for (i=0; i<RawSize; i++)
743 *deb = smask8 - *deb;
748 if ( BitsAllocated == 16 )
750 uint16_t smask16 = 65535;
751 uint16_t *deb = (uint16_t *)Raw;
752 for (i=0; i<RawSize/2; i++)
754 *deb = smask16 - *deb;
763 * \brief Re-arrange the bits within the bytes.
764 * @return Boolean always true
766 bool PixelReadConvert::ConvertReArrangeBits() throw ( FormatError )
768 if ( BitsStored != BitsAllocated )
770 int l = (int)( RawSize / ( BitsAllocated / 8 ) );
771 if ( BitsAllocated == 16 )
773 uint16_t mask = 0xffff;
774 mask = mask >> ( BitsAllocated - BitsStored );
775 uint16_t *deb = (uint16_t*)Raw;
776 for(int i = 0; i<l; i++)
778 *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & mask;
782 else if ( BitsAllocated == 32 )
784 uint32_t mask = 0xffffffff;
785 mask = mask >> ( BitsAllocated - BitsStored );
786 uint32_t *deb = (uint32_t*)Raw;
787 for(int i = 0; i<l; i++)
789 *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & mask;
795 gdcmWarningMacro("Weird image");
796 throw FormatError( "Weird image !?" );
803 * \brief Convert (Red plane, Green plane, Blue plane) to RGB pixels
804 * \warning Works on all the frames at a time
806 void PixelReadConvert::ConvertRGBPlanesToRGBPixels()
808 uint8_t *localRaw = Raw;
809 uint8_t *copyRaw = new uint8_t[ RawSize ];
810 memmove( copyRaw, localRaw, RawSize );
812 int l = XSize * YSize * ZSize;
814 uint8_t *a = copyRaw;
815 uint8_t *b = copyRaw + l;
816 uint8_t *c = copyRaw + l + l;
818 for (int j = 0; j < l; j++)
820 *(localRaw++) = *(a++);
821 *(localRaw++) = *(b++);
822 *(localRaw++) = *(c++);
828 * \brief Convert (cY plane, cB plane, cR plane) to RGB pixels
829 * \warning Works on all the frames at a time
831 void PixelReadConvert::ConvertYcBcRPlanesToRGBPixels()
833 uint8_t *localRaw = Raw;
834 uint8_t *copyRaw = new uint8_t[ RawSize ];
835 memmove( copyRaw, localRaw, RawSize );
837 // to see the tricks about YBR_FULL, YBR_FULL_422,
838 // YBR_PARTIAL_422, YBR_ICT, YBR_RCT have a look at :
839 // ftp://medical.nema.org/medical/dicom/final/sup61_ft.pdf
840 // and be *very* affraid
842 int l = XSize * YSize;
843 int nbFrames = ZSize;
845 uint8_t *a = copyRaw + 0;
846 uint8_t *b = copyRaw + l;
847 uint8_t *c = copyRaw + l+ l;
850 /// \todo : Replace by the 'well known' integer computation
851 /// counterpart. Refer to
852 /// http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf
853 /// for code optimisation.
855 for ( int i = 0; i < nbFrames; i++ )
857 for ( int j = 0; j < l; j++ )
859 R = 38142 *(*a-16) + 52298 *(*c -128);
860 G = 38142 *(*a-16) - 26640 *(*c -128) - 12845 *(*b -128);
861 B = 38142 *(*a-16) + 66093 *(*b -128);
870 if (R > 255) R = 255;
871 if (G > 255) G = 255;
872 if (B > 255) B = 255;
874 *(localRaw++) = (uint8_t)R;
875 *(localRaw++) = (uint8_t)G;
876 *(localRaw++) = (uint8_t)B;
885 /// \brief Deals with the color decoding i.e. handle:
886 /// - R, G, B planes (as opposed to RGB pixels)
887 /// - YBR (various) encodings.
888 /// - LUT[s] (or "PALETTE COLOR").
890 void PixelReadConvert::ConvertHandleColor()
892 //////////////////////////////////
893 // Deal with the color decoding i.e. handle:
894 // - R, G, B planes (as opposed to RGB pixels)
895 // - YBR (various) encodings.
896 // - LUT[s] (or "PALETTE COLOR").
898 // The classification in the color decoding schema is based on the blending
899 // of two Dicom tags values:
900 // * "Photometric Interpretation" for which we have the cases:
901 // - [Photo A] MONOCHROME[1|2] pictures,
902 // - [Photo B] RGB or YBR_FULL_422 (which acts as RGB),
903 // - [Photo C] YBR_* (with the above exception of YBR_FULL_422)
904 // - [Photo D] "PALETTE COLOR" which indicates the presence of LUT[s].
905 // * "Planar Configuration" for which we have the cases:
906 // - [Planar 0] 0 then Pixels are already RGB
907 // - [Planar 1] 1 then we have 3 planes : R, G, B,
908 // - [Planar 2] 2 then we have 1 gray Plane and 3 LUTs
910 // Now in theory, one could expect some coherence when blending the above
911 // cases. For example we should not encounter files belonging at the
912 // time to case [Planar 0] and case [Photo D].
913 // Alas, this was only theory ! Because in practice some odd (read ill
914 // formated Dicom) files (e.g. gdcmData/US-PAL-8-10x-echo.dcm) we encounter:
915 // - "Planar Configuration" = 0,
916 // - "Photometric Interpretation" = "PALETTE COLOR".
917 // Hence gdcm will use the folowing "heuristic" in order to be tolerant
918 // towards Dicom-non-conformance files:
919 // << whatever the "Planar Configuration" value might be, a
920 // "Photometric Interpretation" set to "PALETTE COLOR" forces
921 // a LUT intervention >>
923 // Now we are left with the following handling of the cases:
924 // - [Planar 0] OR [Photo A] no color decoding (since respectively
925 // Pixels are already RGB and monochrome pictures have no color :),
926 // - [Planar 1] AND [Photo B] handled with ConvertRGBPlanesToRGBPixels()
927 // - [Planar 1] AND [Photo C] handled with ConvertYcBcRPlanesToRGBPixels()
928 // - [Planar 2] OR [Photo D] requires LUT intervention.
932 // [Planar 2] OR [Photo D]: LUT intervention done outside
936 if ( PlanarConfiguration == 1 )
940 // [Planar 1] AND [Photo C] (remember YBR_FULL_422 acts as RGB)
941 ConvertYcBcRPlanesToRGBPixels();
945 // [Planar 1] AND [Photo C]
946 ConvertRGBPlanesToRGBPixels();
951 // When planarConf is 0, and RLELossless (forbidden by Dicom norm)
952 // pixels need to be RGB-fied anyway
955 ConvertRGBPlanesToRGBPixels();
957 // In *normal *case, when planarConf is 0, pixels are already in RGB
960 /// Computes the Pixels Size
961 void PixelReadConvert::ComputeRawAndRGBSizes()
963 int bitsAllocated = BitsAllocated;
964 // Number of "Bits Allocated" is fixed to 16 when it's 12, since
965 // in this case we will expand the image to 16 bits (see
966 // \ref ReadAndDecompress12BitsTo16Bits() )
967 if ( BitsAllocated == 12 )
972 RawSize = XSize * YSize * ZSize
973 * ( bitsAllocated / 8 )
977 RGBSize = 3 * RawSize;
985 /// Allocates room for RGB Pixels
986 void PixelReadConvert::AllocateRGB()
990 RGB = new uint8_t[RGBSize];
993 /// Allocates room for RAW Pixels
994 void PixelReadConvert::AllocateRaw()
998 Raw = new uint8_t[RawSize];
1001 //-----------------------------------------------------------------------------
1004 * \brief Print self.
1005 * @param indent Indentation string to be prepended during printing.
1006 * @param os Stream to print to.
1008 void PixelReadConvert::Print( std::ostream &os, std::string const &indent )
1011 << "--- Pixel information -------------------------"
1014 << "Pixel Data: offset " << PixelOffset
1015 << " x(" << std::hex << PixelOffset << std::dec
1016 << ") length " << PixelDataLength
1017 << " x(" << std::hex << PixelDataLength << std::dec
1018 << ")" << std::endl;
1020 if ( IsRLELossless )
1024 RLEInfo->Print( os, indent );
1028 gdcmWarningMacro("Set as RLE file but NO RLEinfo present.");
1032 if ( IsJPEG2000 || IsJPEGLossless || IsJPEGLossy || IsJPEGLS )
1036 JPEGInfo->Print( os, indent );
1040 gdcmWarningMacro("Set as JPEG file but NO JPEGinfo present.");
1045 //-----------------------------------------------------------------------------
1046 } // end namespace gdcm
1048 // NOTES on File internal calls
1050 // ---> GetImageData
1051 // ---> GetImageDataIntoVector
1052 // |---> GetImageDataIntoVectorRaw
1053 // | lut intervention
1055 // ---> GetImageDataRaw
1056 // ---> GetImageDataIntoVectorRaw