- LutNbits=atoi(tokens[2].c_str());
- tokens.clear();
- return LutNbits;
-}
-
-/**
- * \ingroup gdcmHeader
- * \brief builts Red/Green/Blue/Alpha LUT from Header
- * when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
- * and (0028,1101),(0028,1102),(0028,1102)
- * - xxx Palette Color Lookup Table Descriptor - are found
- * and (0028,1201),(0028,1202),(0028,1202)
- * - xxx Palette Color Lookup Table Data - are found
- * \warning does NOT deal with :
- * 0028 1100 Gray Lookup Table Descriptor (Retired)
- * 0028 1221 Segmented Red Palette Color Lookup Table Data
- * 0028 1222 Segmented Green Palette Color Lookup Table Data
- * 0028 1223 Segmented Blue Palette Color Lookup Table Data
- * no known Dicom reader deals with them :-(
- * @return a RGBA Lookup Table
- */
-unsigned char * gdcmHeader::GetLUTRGBA(void) {
-// Not so easy : see
-// http://www.barre.nom.fr/medical/dicom2/limitations.html#Color%20Lookup%20Tables
-
-// if Photometric Interpretation # PALETTE COLOR, no LUT to be done
- if (GetEntryByNumber(0x0028,0x0004) != "PALETTE COLOR ") {
- return NULL;
- }
- int lengthR, debR, nbitsR;
- int lengthG, debG, nbitsG;
- int lengthB, debB, nbitsB;
-
-// Get info from Lut Descriptors
-// (the 3 LUT descriptors may be different)
- std::string LutDescriptionR = GetEntryByNumber(0x0028,0x1101);
- if (LutDescriptionR == GDCM_UNFOUND)
- return NULL;
- std::string LutDescriptionG = GetEntryByNumber(0x0028,0x1102);
- if (LutDescriptionG == GDCM_UNFOUND)
- return NULL;
- std::string LutDescriptionB = GetEntryByNumber(0x0028,0x1103);
- if (LutDescriptionB == GDCM_UNFOUND)
- return NULL;
-
- std::vector<std::string> tokens;
-
- tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
- Tokenize (LutDescriptionR, tokens, "\\");
- lengthR=atoi(tokens[0].c_str()); // Red LUT length in Bytes
- debR =atoi(tokens[1].c_str()); // subscript of the first Lut Value
- nbitsR =atoi(tokens[2].c_str()); // Lut item size (in Bits)
- tokens.clear();
-
- tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
- Tokenize (LutDescriptionG, tokens, "\\");
- lengthG=atoi(tokens[0].c_str()); // Green LUT length in Bytes
- debG =atoi(tokens[1].c_str()); // subscript of the first Lut Value
- nbitsG =atoi(tokens[2].c_str()); // Lut item size (in Bits)
- tokens.clear();
-
- tokens.erase(tokens.begin(),tokens.end()); // clean any previous value
- Tokenize (LutDescriptionB, tokens, "\\");
- lengthB=atoi(tokens[0].c_str()); // Blue LUT length in Bytes
- debB =atoi(tokens[1].c_str()); // subscript of the first Lut Value
- nbitsB =atoi(tokens[2].c_str()); // Lut item size (in Bits)