Program: gdcm
Module: $RCSfile: gdcmPixelReadConvert.cxx,v $
Language: C++
- Date: $Date: 2005/06/15 19:59:39 $
- Version: $Revision: 1.66 $
+ Date: $Date: 2005/06/22 07:52:32 $
+ Version: $Revision: 1.69 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
LutRedData = (uint8_t*)file->GetEntryBinArea( 0x0028, 0x1201 );
if ( ! LutRedData )
{
- gdcmWarningMacro( "Unable to read Red LUT data" );
+ gdcmWarningMacro( "Unable to read Red Palette Color Lookup Table data" );
}
// //// Green round:
LutGreenData = (uint8_t*)file->GetEntryBinArea(0x0028, 0x1202 );
if ( ! LutGreenData)
{
- gdcmWarningMacro( "Unable to read Green LUT data" );
+ gdcmWarningMacro( "Unable to read Green Palette Color Lookup Table data" );
}
// //// Blue round:
LutBlueData = (uint8_t*)file->GetEntryBinArea( 0x0028, 0x1203 );
if ( ! LutBlueData )
{
- gdcmWarningMacro( "Unable to read Blue LUT data" );
+ gdcmWarningMacro( "Unable to read Blue Palette Color Lookup Table data" );
}
}
AllocateRaw();
//////////////////////////////////////////////////
- //// Second stage: read from disk dans decompress.
+ //// Second stage: read from disk and decompress.
if ( BitsAllocated == 12 )
{
ReadAndDecompress12BitsTo16Bits( fp);
// The job can't be done
return false;
}
+
+ gdcmWarningMacro( "--> BuildRGBImage" );
// Build RGB Pixels
AllocateRGB();
int j;
- if( BitsAllocated <= 8)
+ if( BitsAllocated <= 8 )
{
uint8_t *localRGB = RGB;
for (size_t i = 0; i < RawSize; ++i )
assert( !IsJPEGLossless || !IsJPEGLossy || !IsJPEGLS );
// FIXME this is really ugly but it seems I have to load the complete
// jpeg2000 stream to use jasper:
- // I don't think we'll ever be able to deal with multiple fragments properly
+ // I don't think we'll ever be able to deal with multiple fragments properly
unsigned long inputlength = 0;
JPEGFragment *jpegfrag = JPEGInfo->GetFirstFragment();
gdcmWarningMacro(" lengthB " << lengthB << " debB "
<< debB << " nbitsB " << nbitsB);
- if ( !lengthR ) // if = 2^16, this shall be 0 see : CP-143
+ if( !lengthR ) // if = 2^16, this shall be 0 see : CP-143
lengthR=65536;
if( !lengthG ) // if = 2^16, this shall be 0
lengthG=65536;
- if ( !lengthB ) // if = 2^16, this shall be 0
+ if( !lengthB ) // if = 2^16, this shall be 0
lengthB=65536;
////////////////////////////////////////////////////////
- if ( ( ! LutRedData ) || ( ! LutGreenData ) || ( ! LutBlueData ) )
+ if( ( ! LutRedData ) || ( ! LutGreenData ) || ( ! LutBlueData ) )
{
gdcmWarningMacro( "(At least) a LUT is missing" );
return;
// -------------------------------------------------------------
- if ( BitsAllocated <= 8)
+ if( BitsAllocated <= 8 )
{
// forge the 4 * 8 Bits Red/Green/Blue/Alpha LUT
LutRGBA = new uint8_t[ 1024 ]; // 256 * 4 (R, G, B, Alpha)
if ( !LutRGBA )
return;
-
+ LutItemNumber = 256;
+ LutItemSize = 8;
memset( LutRGBA, 0, 1024 );
int mult;
- if ( ( nbitsR == 16 ) && ( BitsAllocated == 8 ) )
+ if( ( nbitsR == 16 ) && ( BitsAllocated == 8 ) )
{
// when LUT item size is different than pixel size
mult = 2; // high byte must be = low byte
//take "Subscript of the first Lut Value" (debR,debG,debB) into account!
+ //FIXME : +1 : to get 'low value' byte
+ // Trouble expected on Big Endian Processors ?
+ // 16 BIts Per Pixel Palette Color to be swapped?
+
a = LutRGBA + 0 + debR;
for( i=0; i < lengthR; ++i )
{
- *a = LutRedData[i*mult+1];
+ *a = LutRedData[i*mult+1];
a += 4;
}
*a = LutBlueData[i*mult+1];
a += 4;
}
-
+
a = LutRGBA + 3 ;
for(i=0; i < 256; ++i)
{
return;
memset( LutRGBA, 0, 65536*4*2 ); // 16 bits = 2 bytes ;-)
+ LutItemNumber = 65536;
+ LutItemSize = 16;
+
int i;
uint16_t *a16;
a16 = (uint16_t*)LutRGBA + 0 + debR;
for( i=0; i < lengthR; ++i )
{
- *a16 = ((uint16_t*)LutRedData)[i+1];
+ *a16 = ((uint16_t*)LutRedData)[i];
a16 += 4;
}
a16 = (uint16_t*)LutRGBA + 1 + debG;
for( i=0; i < lengthG; ++i)
{
- *a16 = ((uint16_t*)LutGreenData)[i+1];
+ *a16 = ((uint16_t*)LutGreenData)[i];
a16 += 4;
}
a16 = (uint16_t*)LutRGBA + 2 + debB;
for(i=0; i < lengthB; ++i)
{
- *a16 = ((uint16_t*)LutBlueData)[i+1];
+ *a16 = ((uint16_t*)LutBlueData)[i];
a16 += 4;
}
*a16 = 1; // Alpha component
a16 += 4;
}
-/*
+/* Just to 'see' the LUT, at debug time
+
a16=(uint16_t*)LutRGBA;
for (int j=0;j<65536;j++)
{
if ( BitsStored != BitsAllocated )
{
int l = (int)( RawSize / ( BitsAllocated / 8 ) );
- if ( BitsAllocated == 16 )
+ if ( BitsAllocated == 16
{
- uint16_t mask = 0xffff;
- mask = mask >> ( BitsAllocated - BitsStored );
+ // pmask : to mask the 'unused bits' (may contain overlays)
+ uint16_t pmask = 0xffff;
+ pmask = pmask >> ( BitsAllocated - BitsStored );
+
uint16_t *deb = (uint16_t*)Raw;
- for(int i = 0; i<l; i++)
+
+ if ( !PixelSign )
{
- *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & mask;
- deb++;
+ for(int i = 0; i<l; i++)
+ {
+ *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & pmask;
+ deb++;
+ }
+ }
+ else
+ {
+ // smask : to check the 'sign' when BitsStored != BitsAllocated
+ uint16_t smask = 0x8000;
+ smask = smask >> ( BitsAllocated - BitsStored );
+ // nmask : to propagate sign bit on negative values
+ int16_t nmask = 0x8000;
+ nmask = nmask >> ( BitsAllocated - BitsStored );
+
+ for(int i = 0; i<l; i++)
+ {
+ *deb = *deb >> (BitsStored - HighBitPosition - 1);
+ if ( *deb & smask )
+ *deb = *deb | nmask;
+ else
+ *deb = *deb & pmask;
+ deb++;
+ }
}
}
else if ( BitsAllocated == 32 )
{
- uint32_t mask = 0xffffffff;
- mask = mask >> ( BitsAllocated - BitsStored );
+ // pmask : to mask the 'unused bits' (may contain overlays)
+ uint32_t pmask = 0xffffffff;
+ pmask = pmask >> ( BitsAllocated - BitsStored );
+
uint32_t *deb = (uint32_t*)Raw;
- for(int i = 0; i<l; i++)
+
+ if ( !PixelSign )
{
- *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & mask;
- deb++;
+ for(int i = 0; i<l; i++)
+ {
+ *deb = (*deb >> (BitsStored - HighBitPosition - 1)) & pmask;
+ deb++;
+ }
+ }
+ else
+ {
+ // smask : to check the 'sign' when BitsStored != BitsAllocated
+ uint32_t smask = 0x80000000;
+ smask = smask >> ( BitsAllocated - BitsStored );
+ // nmask : to propagate sign bit on negative values
+ int32_t nmask = 0x80000000;
+ nmask = nmask >> ( BitsAllocated - BitsStored )
+
+ for(int i = 0; i<l; i++)
+ {
+ *deb = *deb >> (BitsStored - HighBitPosition - 1);
+ if ( *deb & smask )
+ *deb = *deb | nmask;
+ else
+ *deb = *deb & pmask;
+ deb++;
+ }
}
}
else
{
- gdcmWarningMacro("Weird image");
+ gdcmWarningMacro("Weird image (BitsAllocated !=8, 12, 16, 32)");
throw FormatError( "Weird image !?" );
}
}
*/
void PixelReadConvert::ConvertRGBPlanesToRGBPixels()
{
+ gdcmWarningMacro("--> ConvertRGBPlanesToRGBPixels");
+
uint8_t *localRaw = Raw;
uint8_t *copyRaw = new uint8_t[ RawSize ];
memmove( copyRaw, localRaw, RawSize );
*/
void PixelReadConvert::ConvertYcBcRPlanesToRGBPixels()
{
+ // Remarks for YBR newbees :
+ // YBR_FULL works very much like RGB, i.e. three samples per pixel,
+ // just the color space is YCbCr instead of RGB. This is particularly useful
+ // for doppler ultrasound where most of the image is grayscale
+ // (i.e. only populates the Y components) and Cb and Cr are mostly zero,
+ // except for the few patches of color on the image.
+ // On such images, RLE achieves a compression ratio that is much better
+ // than the compression ratio on an equivalent RGB image.
+
+ gdcmWarningMacro("--> ConvertYcBcRPlanesToRGBPixels");
+
uint8_t *localRaw = Raw;
uint8_t *copyRaw = new uint8_t[ RawSize ];
memmove( copyRaw, localRaw, RawSize );
// - [Planar 1] AND [Photo C] handled with ConvertYcBcRPlanesToRGBPixels()
// - [Planar 2] OR [Photo D] requires LUT intervention.
+ gdcmWarningMacro("--> ConvertHandleColor"
+ << "Planar Configuration " << PlanarConfiguration );
+
if ( ! IsRawRGB() )
{
// [Planar 2] OR [Photo D]: LUT intervention done outside
+ gdcmWarningMacro("--> RawRGB : LUT intervention done outside");
return;
}
if ( IsYBRFull )
{
// [Planar 1] AND [Photo C] (remember YBR_FULL_422 acts as RGB)
+ gdcmWarningMacro("--> YBRFull");
ConvertYcBcRPlanesToRGBPixels();
}
else
{
// [Planar 1] AND [Photo C]
+ gdcmWarningMacro("--> YBRFull");
ConvertRGBPlanesToRGBPixels();
}
return;
}
// When planarConf is 0, and RLELossless (forbidden by Dicom norm)
- // pixels need to be RGB-fied anyway
+ // pixels need to be RGB-fyied anyway
+
if (IsRLELossless)
- {
+ {
+ gdcmWarningMacro("--> RLE Lossless");
ConvertRGBPlanesToRGBPixels();
}
+
// In *normal *case, when planarConf is 0, pixels are already in RGB
}
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff