1 /*=========================================================================
4 Module: $RCSfile: gdcmPixelReadConvert.cxx,v $
6 Date: $Date: 2005/05/25 12:54:18 $
7 Version: $Revision: 1.60 $
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 "gdcmDebug.h"
21 #include "gdcmGlobal.h"
23 #include "gdcmPixelReadConvert.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 (std::ifstream* fp, void* raw, size_t inputlength);
36 //-----------------------------------------------------------------------------
37 #define str2num(str, typeNum) *((typeNum *)(str))
39 //-----------------------------------------------------------------------------
40 // Constructor / Destructor
42 PixelReadConvert::PixelReadConvert()
54 /// Canonical Destructor
55 PixelReadConvert::~PixelReadConvert()
60 //-----------------------------------------------------------------------------
63 * \brief Predicate to know whether the image[s] (once Raw) is RGB.
64 * \note See comments of \ref ConvertHandleColor
66 bool PixelReadConvert::IsRawRGB()
69 || PlanarConfiguration == 2
77 * \brief Gets various usefull informations from the file header
78 * @param file gdcm::File pointer
80 void PixelReadConvert::GrabInformationsFromFile( File *file )
82 // Number of Bits Allocated for storing a Pixel is defaulted to 16
83 // when absent from the file.
84 BitsAllocated = file->GetBitsAllocated();
85 if ( BitsAllocated == 0 )
90 // Number of "Bits Stored", defaulted to number of "Bits Allocated"
91 // when absent from the file.
92 BitsStored = file->GetBitsStored();
93 if ( BitsStored == 0 )
95 BitsStored = BitsAllocated;
98 // High Bit Position, defaulted to "Bits Allocated" - 1
99 HighBitPosition = file->GetHighBitPosition();
100 if ( HighBitPosition == 0 )
102 HighBitPosition = BitsAllocated - 1;
105 XSize = file->GetXSize();
106 YSize = file->GetYSize();
107 ZSize = file->GetZSize();
108 SamplesPerPixel = file->GetSamplesPerPixel();
109 PixelSize = file->GetPixelSize();
110 PixelSign = file->IsSignedPixelData();
111 SwapCode = file->GetSwapCode();
112 std::string ts = file->GetTransferSyntax();
114 ( ! file->IsDicomV3() )
115 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ImplicitVRLittleEndian
116 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ImplicitVRLittleEndianDLXGE
117 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ExplicitVRLittleEndian
118 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::ExplicitVRBigEndian
119 || Global::GetTS()->GetSpecialTransferSyntax(ts) == TS::DeflatedExplicitVRLittleEndian;
121 IsMPEG = Global::GetTS()->IsMPEG(ts);
122 IsJPEG2000 = Global::GetTS()->IsJPEG2000(ts);
123 IsJPEGLS = Global::GetTS()->IsJPEGLS(ts);
124 IsJPEGLossy = Global::GetTS()->IsJPEGLossy(ts);
125 IsJPEGLossless = Global::GetTS()->IsJPEGLossless(ts);
126 IsRLELossless = Global::GetTS()->IsRLELossless(ts);
128 PixelOffset = file->GetPixelOffset();
129 PixelDataLength = file->GetPixelAreaLength();
130 RLEInfo = file->GetRLEInfo();
131 JPEGInfo = file->GetJPEGInfo();
133 IsMonochrome = file->IsMonochrome();
134 IsMonochrome1 = file->IsMonochrome1();
135 IsPaletteColor = file->IsPaletteColor();
136 IsYBRFull = file->IsYBRFull();
138 PlanarConfiguration = file->GetPlanarConfiguration();
140 /////////////////////////////////////////////////////////////////
142 HasLUT = file->HasLUT();
145 // Just in case some access to a File element requires disk access.
146 LutRedDescriptor = file->GetEntryValue( 0x0028, 0x1101 );
147 LutGreenDescriptor = file->GetEntryValue( 0x0028, 0x1102 );
148 LutBlueDescriptor = file->GetEntryValue( 0x0028, 0x1103 );
150 // Depending on the value of Document::MAX_SIZE_LOAD_ELEMENT_VALUE
151 // [ refer to invocation of Document::SetMaxSizeLoadEntry() in
152 // Document::Document() ], the loading of the value (content) of a
153 // [Bin|Val]Entry occurence migth have been hindered (read simply NOT
154 // loaded). Hence, we first try to obtain the LUTs data from the file
155 // and when this fails we read the LUTs data directly from disk.
156 // \TODO Reading a [Bin|Val]Entry directly from disk is a kludge.
157 // We should NOT bypass the [Bin|Val]Entry class. Instead
158 // an access to an UNLOADED content of a [Bin|Val]Entry occurence
159 // (e.g. BinEntry::GetBinArea()) should force disk access from
160 // within the [Bin|Val]Entry class itself. The only problem
161 // is that the [Bin|Val]Entry is unaware of the FILE* is was
162 // parsed from. Fix that. FIXME.
165 file->LoadEntryBinArea(0x0028, 0x1201);
166 LutRedData = (uint8_t*)file->GetEntryBinArea( 0x0028, 0x1201 );
169 gdcmWarningMacro( "Unable to read Red LUT data" );
173 file->LoadEntryBinArea(0x0028, 0x1202);
174 LutGreenData = (uint8_t*)file->GetEntryBinArea(0x0028, 0x1202 );
177 gdcmWarningMacro( "Unable to read Green LUT data" );
181 file->LoadEntryBinArea(0x0028, 0x1203);
182 LutBlueData = (uint8_t*)file->GetEntryBinArea( 0x0028, 0x1203 );
185 gdcmWarningMacro( "Unable to read Blue LUT data" );
189 ComputeRawAndRGBSizes();
192 /// \brief Reads from disk and decompresses Pixels
193 bool PixelReadConvert::ReadAndDecompressPixelData( std::ifstream *fp )
195 // ComputeRawAndRGBSizes is already made by
196 // ::GrabInformationsFromfile. So, the structure sizes are
200 //////////////////////////////////////////////////
201 //// First stage: get our hands on the Pixel Data.
204 gdcmWarningMacro( "Unavailable file pointer." );
208 fp->seekg( PixelOffset, std::ios::beg );
209 if( fp->fail() || fp->eof())
211 gdcmWarningMacro( "Unable to find PixelOffset in file." );
217 //////////////////////////////////////////////////
218 //// Second stage: read from disk dans decompress.
219 if ( BitsAllocated == 12 )
221 ReadAndDecompress12BitsTo16Bits( fp);
225 // This problem can be found when some obvious informations are found
226 // after the field containing the image data. In this case, these
227 // bad data are added to the size of the image (in the PixelDataLength
228 // variable). But RawSize is the right size of the image !
229 if( PixelDataLength != RawSize)
231 gdcmWarningMacro( "Mismatch between PixelReadConvert : "
232 << PixelDataLength << " and RawSize : " << RawSize );
234 if( PixelDataLength > RawSize)
236 fp->read( (char*)Raw, RawSize);
240 fp->read( (char*)Raw, PixelDataLength);
243 if ( fp->fail() || fp->eof())
245 gdcmWarningMacro( "Reading of Raw pixel data failed." );
249 else if ( IsRLELossless )
251 if ( ! RLEInfo->DecompressRLEFile( fp, Raw, XSize, YSize, ZSize, BitsAllocated ) )
253 gdcmWarningMacro( "RLE decompressor failed." );
259 //gdcmWarningMacro( "Sorry, MPEG not yet taken into account" );
261 // ReadMPEGFile(fp, Raw, PixelDataLength); // fp has already been seek to start of mpeg
266 // Default case concerns JPEG family
267 if ( ! ReadAndDecompressJPEGFile( fp ) )
269 gdcmWarningMacro( "JPEG decompressor failed." );
274 ////////////////////////////////////////////
275 //// Third stage: twigle the bytes and bits.
276 ConvertReorderEndianity();
277 ConvertReArrangeBits();
278 ConvertFixGreyLevels();
279 ConvertHandleColor();
284 /// Deletes Pixels Area
285 void PixelReadConvert::Squeeze()
301 * \brief Build the RGB image from the Raw imagage and the LUTs.
303 bool PixelReadConvert::BuildRGBImage()
307 // The job is already done.
313 // The job can't be done
320 // The job can't be done
326 uint8_t *localRGB = RGB;
327 for (size_t i = 0; i < RawSize; ++i )
330 *localRGB++ = LutRGBA[j];
331 *localRGB++ = LutRGBA[j+1];
332 *localRGB++ = LutRGBA[j+2];
337 //-----------------------------------------------------------------------------
340 //-----------------------------------------------------------------------------
343 * \brief Read from file a 12 bits per pixel image and decompress it
344 * into a 16 bits per pixel image.
346 void PixelReadConvert::ReadAndDecompress12BitsTo16Bits( std::ifstream *fp )
347 throw ( FormatError )
349 int nbPixels = XSize * YSize;
350 uint16_t *localDecompres = (uint16_t*)Raw;
352 for( int p = 0; p < nbPixels; p += 2 )
356 fp->read( (char*)&b0, 1);
357 if ( fp->fail() || fp->eof() )
359 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
360 "Unfound first block" );
363 fp->read( (char*)&b1, 1 );
364 if ( fp->fail() || fp->eof())
366 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
367 "Unfound second block" );
370 fp->read( (char*)&b2, 1 );
371 if ( fp->fail() || fp->eof())
373 throw FormatError( "PixelReadConvert::ReadAndDecompress12BitsTo16Bits()",
374 "Unfound second block" );
377 // Two steps are necessary to please VC++
379 // 2 pixels 12bit = [0xABCDEF]
380 // 2 pixels 16bit = [0x0ABD] + [0x0FCE]
382 *localDecompres++ = ((b0 >> 4) << 8) + ((b0 & 0x0f) << 4) + (b1 & 0x0f);
384 *localDecompres++ = ((b2 & 0x0f) << 8) + ((b1 >> 4) << 4) + (b2 >> 4);
386 /// \todo JPR Troubles expected on Big-Endian processors ?
391 * \brief Reads from disk the Pixel Data of JPEG Dicom encapsulated
392 * file and decompress it.
393 * @param fp File Pointer
396 bool PixelReadConvert::ReadAndDecompressJPEGFile( std::ifstream *fp )
400 // gdcmWarningMacro( "Sorry, JPEG2000 not yet taken into account" );
401 fp->seekg( JPEGInfo->GetFirstFragment()->GetOffset(), std::ios::beg);
402 // if ( ! gdcm_read_JPEG2000_file( fp,Raw, JPEGInfo->GetFirstFragment()->GetLength() ) )
408 // WARNING : JPEG-LS is NOT the 'classical' Jpeg Lossless :
409 // [JPEG-LS is the basis for new lossless/near-lossless compression
410 // standard for continuous-tone images intended for JPEG2000. The standard
411 // is based on the LOCO-I algorithm (LOw COmplexity LOssless COmpression
412 // for Images) developed at Hewlett-Packard Laboratories]
414 // see http://datacompression.info/JPEGLS.shtml
417 gdcmWarningMacro( "Sorry, JPEG-LS not yet taken into account" );
418 fp->seekg( JPEGInfo->GetFirstFragment()->GetOffset(), std::ios::beg);
419 // if ( ! gdcm_read_JPEGLS_file( fp,Raw ) )
424 // Precompute the offset localRaw will be shifted with
425 int length = XSize * YSize * SamplesPerPixel;
426 int numberBytes = BitsAllocated / 8;
428 JPEGInfo->DecompressFromFile(fp, Raw, BitsStored, numberBytes, length );
433 * \brief Build Red/Green/Blue/Alpha LUT from File
434 * when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
435 * and (0028,1101),(0028,1102),(0028,1102)
436 * - xxx Palette Color Lookup Table Descriptor - are found
437 * and (0028,1201),(0028,1202),(0028,1202)
438 * - xxx Palette Color Lookup Table Data - are found
439 * \warning does NOT deal with :
440 * 0028 1100 Gray Lookup Table Descriptor (Retired)
441 * 0028 1221 Segmented Red Palette Color Lookup Table Data
442 * 0028 1222 Segmented Green Palette Color Lookup Table Data
443 * 0028 1223 Segmented Blue Palette Color Lookup Table Data
444 * no known Dicom reader deals with them :-(
445 * @return a RGBA Lookup Table
447 void PixelReadConvert::BuildLUTRGBA()
454 // http://www.barre.nom.fr/medical/dicom2/limitations.html#Color%20Lookup%20Tables
456 if ( ! IsPaletteColor )
461 if ( LutRedDescriptor == GDCM_UNFOUND
462 || LutGreenDescriptor == GDCM_UNFOUND
463 || LutBlueDescriptor == GDCM_UNFOUND )
468 ////////////////////////////////////////////
469 // Extract the info from the LUT descriptors
470 int lengthR; // Red LUT length in Bytes
471 int debR; // Subscript of the first Lut Value
472 int nbitsR; // Lut item size (in Bits)
473 int nbRead = sscanf( LutRedDescriptor.c_str(),
475 &lengthR, &debR, &nbitsR );
478 gdcmWarningMacro( "Wrong Red LUT descriptor" );
481 int lengthG; // Green LUT length in Bytes
482 int debG; // Subscript of the first Lut Value
483 int nbitsG; // Lut item size (in Bits)
484 nbRead = sscanf( LutGreenDescriptor.c_str(),
486 &lengthG, &debG, &nbitsG );
489 gdcmWarningMacro( "Wrong Green LUT descriptor" );
492 int lengthB; // Blue LUT length in Bytes
493 int debB; // Subscript of the first Lut Value
494 int nbitsB; // Lut item size (in Bits)
495 nbRead = sscanf( LutRedDescriptor.c_str(),
497 &lengthB, &debB, &nbitsB );
500 gdcmWarningMacro( "Wrong Blue LUT descriptor" );
503 ////////////////////////////////////////////////////////
504 if ( ( ! LutRedData ) || ( ! LutGreenData ) || ( ! LutBlueData ) )
509 ////////////////////////////////////////////////
510 // forge the 4 * 8 Bits Red/Green/Blue/Alpha LUT
511 LutRGBA = new uint8_t[ 1024 ]; // 256 * 4 (R, G, B, Alpha)
515 memset( LutRGBA, 0, 1024 );
518 if ( ( nbitsR == 16 ) && ( BitsAllocated == 8 ) )
520 // when LUT item size is different than pixel size
521 mult = 2; // high byte must be = low byte
525 // See PS 3.3-2003 C.11.1.1.2 p 619
529 // if we get a black image, let's just remove the '+1'
530 // from 'i*mult+1' and check again
531 // if it works, we shall have to check the 3 Palettes
532 // to see which byte is ==0 (first one, or second one)
534 // We give up the checking to avoid some (useless ?) overhead
535 // (optimistic asumption)
537 uint8_t *a = LutRGBA + 0;
538 for( i=0; i < lengthR; ++i )
540 *a = LutRedData[i*mult+1];
545 for( i=0; i < lengthG; ++i)
547 *a = LutGreenData[i*mult+1];
552 for(i=0; i < lengthB; ++i)
554 *a = LutBlueData[i*mult+1];
559 for(i=0; i < 256; ++i)
561 *a = 1; // Alpha component
567 * \brief Swap the bytes, according to \ref SwapCode.
569 void PixelReadConvert::ConvertSwapZone()
573 if( BitsAllocated == 16 )
575 uint16_t *im16 = (uint16_t*)Raw;
583 for( i = 0; i < RawSize / 2; i++ )
585 im16[i]= (im16[i] >> 8) | (im16[i] << 8 );
589 gdcmWarningMacro("SwapCode value (16 bits) not allowed.");
592 else if( BitsAllocated == 32 )
597 uint32_t *im32 = (uint32_t*)Raw;
603 for( i = 0; i < RawSize / 4; i++ )
605 low = im32[i] & 0x0000ffff; // 4321
606 high = im32[i] >> 16;
607 high = ( high >> 8 ) | ( high << 8 );
608 low = ( low >> 8 ) | ( low << 8 );
610 im32[i] = ( s32 << 16 ) | high;
614 for( i = 0; i < RawSize / 4; i++ )
616 low = im32[i] & 0x0000ffff; // 2143
617 high = im32[i] >> 16;
618 high = ( high >> 8 ) | ( high << 8 );
619 low = ( low >> 8 ) | ( low << 8 );
621 im32[i] = ( s32 << 16 ) | low;
625 for( i = 0; i < RawSize / 4; i++ )
627 low = im32[i] & 0x0000ffff; // 3412
628 high = im32[i] >> 16;
630 im32[i] = ( s32 << 16 ) | high;
634 gdcmWarningMacro("SwapCode value (32 bits) not allowed." );
640 * \brief Deal with endianness i.e. re-arange bytes inside the integer
642 void PixelReadConvert::ConvertReorderEndianity()
644 if ( BitsAllocated != 8 )
649 // Special kludge in order to deal with xmedcon broken images:
650 if ( BitsAllocated == 16
651 && BitsStored < BitsAllocated
654 int l = (int)( RawSize / ( BitsAllocated / 8 ) );
655 uint16_t *deb = (uint16_t *)Raw;
656 for(int i = 0; i<l; i++)
668 * \brief Deal with Grey levels i.e. re-arange them
669 * to have low values = dark, high values = bright
671 void PixelReadConvert::ConvertFixGreyLevels()
676 uint32_t i; // to please M$VC6
681 if ( BitsAllocated == 8 )
683 uint8_t *deb = (uint8_t *)Raw;
684 for (i=0; i<RawSize; i++)
692 if ( BitsAllocated == 16 )
695 for (j=0; j<BitsStored-1; j++)
697 mask = (mask << 1) +1; // will be fff when BitsStored=12
700 uint16_t *deb = (uint16_t *)Raw;
701 for (i=0; i<RawSize/2; i++)
711 if ( BitsAllocated == 8 )
713 uint8_t smask8 = 255;
714 uint8_t *deb = (uint8_t *)Raw;
715 for (i=0; i<RawSize; i++)
717 *deb = smask8 - *deb;
722 if ( BitsAllocated == 16 )
724 uint16_t smask16 = 65535;
725 uint16_t *deb = (uint16_t *)Raw;
726 for (i=0; i<RawSize/2; i++)
728 *deb = smask16 - *deb;
737 * \brief Re-arrange the bits within the bytes.
738 * @return Boolean always true
740 bool PixelReadConvert::ConvertReArrangeBits() throw ( FormatError )
742 if ( BitsStored != BitsAllocated )
744 int l = (int)( RawSize / ( BitsAllocated / 8 ) );
745 if ( BitsAllocated == 16 )
747 uint16_t mask = 0xffff;
748 mask = mask >> ( BitsAllocated - BitsStored );
749 uint16_t *deb = (uint16_t*)Raw;
750 for(int i = 0; i<l; i++)
752 *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & mask;
756 else if ( BitsAllocated == 32 )
758 uint32_t mask = 0xffffffff;
759 mask = mask >> ( BitsAllocated - BitsStored );
760 uint32_t *deb = (uint32_t*)Raw;
761 for(int i = 0; i<l; i++)
763 *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & mask;
769 gdcmWarningMacro("Weird image");
770 throw FormatError( "Weird image !?" );
777 * \brief Convert (Red plane, Green plane, Blue plane) to RGB pixels
778 * \warning Works on all the frames at a time
780 void PixelReadConvert::ConvertRGBPlanesToRGBPixels()
782 uint8_t *localRaw = Raw;
783 uint8_t *copyRaw = new uint8_t[ RawSize ];
784 memmove( copyRaw, localRaw, RawSize );
786 int l = XSize * YSize * ZSize;
788 uint8_t *a = copyRaw;
789 uint8_t *b = copyRaw + l;
790 uint8_t *c = copyRaw + l + l;
792 for (int j = 0; j < l; j++)
794 *(localRaw++) = *(a++);
795 *(localRaw++) = *(b++);
796 *(localRaw++) = *(c++);
802 * \brief Convert (cY plane, cB plane, cR plane) to RGB pixels
803 * \warning Works on all the frames at a time
805 void PixelReadConvert::ConvertYcBcRPlanesToRGBPixels()
807 uint8_t *localRaw = Raw;
808 uint8_t *copyRaw = new uint8_t[ RawSize ];
809 memmove( copyRaw, localRaw, RawSize );
811 // to see the tricks about YBR_FULL, YBR_FULL_422,
812 // YBR_PARTIAL_422, YBR_ICT, YBR_RCT have a look at :
813 // ftp://medical.nema.org/medical/dicom/final/sup61_ft.pdf
814 // and be *very* affraid
816 int l = XSize * YSize;
817 int nbFrames = ZSize;
819 uint8_t *a = copyRaw + 0;
820 uint8_t *b = copyRaw + l;
821 uint8_t *c = copyRaw + l+ l;
824 /// \todo : Replace by the 'well known' integer computation
825 /// counterpart. Refer to
826 /// http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf
827 /// for code optimisation.
829 for ( int i = 0; i < nbFrames; i++ )
831 for ( int j = 0; j < l; j++ )
833 R = 38142 *(*a-16) + 52298 *(*c -128);
834 G = 38142 *(*a-16) - 26640 *(*c -128) - 12845 *(*b -128);
835 B = 38142 *(*a-16) + 66093 *(*b -128);
844 if (R > 255) R = 255;
845 if (G > 255) G = 255;
846 if (B > 255) B = 255;
848 *(localRaw++) = (uint8_t)R;
849 *(localRaw++) = (uint8_t)G;
850 *(localRaw++) = (uint8_t)B;
859 /// \brief Deals with the color decoding i.e. handle:
860 /// - R, G, B planes (as opposed to RGB pixels)
861 /// - YBR (various) encodings.
862 /// - LUT[s] (or "PALETTE COLOR").
864 void PixelReadConvert::ConvertHandleColor()
866 //////////////////////////////////
867 // Deal with the color decoding i.e. handle:
868 // - R, G, B planes (as opposed to RGB pixels)
869 // - YBR (various) encodings.
870 // - LUT[s] (or "PALETTE COLOR").
872 // The classification in the color decoding schema is based on the blending
873 // of two Dicom tags values:
874 // * "Photometric Interpretation" for which we have the cases:
875 // - [Photo A] MONOCHROME[1|2] pictures,
876 // - [Photo B] RGB or YBR_FULL_422 (which acts as RGB),
877 // - [Photo C] YBR_* (with the above exception of YBR_FULL_422)
878 // - [Photo D] "PALETTE COLOR" which indicates the presence of LUT[s].
879 // * "Planar Configuration" for which we have the cases:
880 // - [Planar 0] 0 then Pixels are already RGB
881 // - [Planar 1] 1 then we have 3 planes : R, G, B,
882 // - [Planar 2] 2 then we have 1 gray Plane and 3 LUTs
884 // Now in theory, one could expect some coherence when blending the above
885 // cases. For example we should not encounter files belonging at the
886 // time to case [Planar 0] and case [Photo D].
887 // Alas, this was only theory ! Because in practice some odd (read ill
888 // formated Dicom) files (e.g. gdcmData/US-PAL-8-10x-echo.dcm) we encounter:
889 // - "Planar Configuration" = 0,
890 // - "Photometric Interpretation" = "PALETTE COLOR".
891 // Hence gdcm will use the folowing "heuristic" in order to be tolerant
892 // towards Dicom-non-conformance files:
893 // << whatever the "Planar Configuration" value might be, a
894 // "Photometric Interpretation" set to "PALETTE COLOR" forces
895 // a LUT intervention >>
897 // Now we are left with the following handling of the cases:
898 // - [Planar 0] OR [Photo A] no color decoding (since respectively
899 // Pixels are already RGB and monochrome pictures have no color :),
900 // - [Planar 1] AND [Photo B] handled with ConvertRGBPlanesToRGBPixels()
901 // - [Planar 1] AND [Photo C] handled with ConvertYcBcRPlanesToRGBPixels()
902 // - [Planar 2] OR [Photo D] requires LUT intervention.
906 // [Planar 2] OR [Photo D]: LUT intervention done outside
910 if ( PlanarConfiguration == 1 )
914 // [Planar 1] AND [Photo C] (remember YBR_FULL_422 acts as RGB)
915 ConvertYcBcRPlanesToRGBPixels();
919 // [Planar 1] AND [Photo C]
920 ConvertRGBPlanesToRGBPixels();
925 // When planarConf is 0, and RLELossless (forbidden by Dicom norm)
926 // pixels need to be RGB-fied anyway
929 ConvertRGBPlanesToRGBPixels();
931 // In *normal *case, when planarConf is 0, pixels are already in RGB
934 /// Computes the Pixels Size
935 void PixelReadConvert::ComputeRawAndRGBSizes()
937 int bitsAllocated = BitsAllocated;
938 // Number of "Bits Allocated" is fixed to 16 when it's 12, since
939 // in this case we will expand the image to 16 bits (see
940 // \ref ReadAndDecompress12BitsTo16Bits() )
941 if ( BitsAllocated == 12 )
946 RawSize = XSize * YSize * ZSize
947 * ( bitsAllocated / 8 )
951 RGBSize = 3 * RawSize;
959 /// Allocates room for RGB Pixels
960 void PixelReadConvert::AllocateRGB()
964 RGB = new uint8_t[RGBSize];
967 /// Allocates room for RAW Pixels
968 void PixelReadConvert::AllocateRaw()
972 Raw = new uint8_t[RawSize];
975 //-----------------------------------------------------------------------------
979 * @param indent Indentation string to be prepended during printing.
980 * @param os Stream to print to.
982 void PixelReadConvert::Print( std::ostream &os, std::string const &indent )
985 << "--- Pixel information -------------------------"
988 << "Pixel Data: offset " << PixelOffset
989 << " x(" << std::hex << PixelOffset << std::dec
990 << ") length " << PixelDataLength
991 << " x(" << std::hex << PixelDataLength << std::dec
998 RLEInfo->Print( os, indent );
1002 gdcmWarningMacro("Set as RLE file but NO RLEinfo present.");
1006 if ( IsJPEG2000 || IsJPEGLossless || IsJPEGLossy || IsJPEGLS )
1010 JPEGInfo->Print( os, indent );
1014 gdcmWarningMacro("Set as JPEG file but NO JPEGinfo present.");
1019 //-----------------------------------------------------------------------------
1020 } // end namespace gdcm
1022 // NOTES on File internal calls
1024 // ---> GetImageData
1025 // ---> GetImageDataIntoVector
1026 // |---> GetImageDataIntoVectorRaw
1027 // | lut intervention
1029 // ---> GetImageDataRaw
1030 // ---> GetImageDataIntoVectorRaw