* @param enable_sequences = true to allow the header
* to be parsed *inside* the SeQuences,
* when they have an actual length
+ * @param ignore_shadow = true if user wants to skip shadow groups
+ during parsing, to save memory space
*\TODO : may be we need one more bool,
* to allow skipping the private elements while parsing the header
* in order to save space
*/
gdcmHeader::gdcmHeader(const char *InFilename,
bool exception_on_error,
- bool enable_sequences ):
- gdcmParser(InFilename,exception_on_error,enable_sequences)
+ bool enable_sequences,
+ bool ignore_shadow):
+ gdcmParser(InFilename,exception_on_error,enable_sequences,ignore_shadow)
{
}
//-----------------------------------------------------------------------------
// Public
+/**
+ * \ingroup gdcmHeader
+ * \brief This predicate, based on hopefully reasonable heuristics,
+ * decides whether or not the current gdcmParser was properly parsed
+ * and contains the mandatory information for being considered as
+ * a well formed and usable Dicom/Acr File.
+ * @return true when gdcmParser is the one of a reasonable Dicom/Acr file,
+ * false otherwise.
+ */
+bool gdcmHeader::IsReadable(void) {
+ if(!gdcmParser::IsReadable())
+ return(false);
+
+ std::string res = GetEntryByNumber(0x0028, 0x0005);
+ if ( res != GDCM_UNFOUND && atoi(res.c_str()) > 4 )
+ return false; // Image Dimensions
+ if ( !GetHeaderEntryByNumber(0x0028, 0x0100) )
+ return false; // "Bits Allocated"
+ if ( !GetHeaderEntryByNumber(0x0028, 0x0101) )
+ return false; // "Bits Stored"
+ if ( !GetHeaderEntryByNumber(0x0028, 0x0102) )
+ return false; // "High Bit"
+ if ( !GetHeaderEntryByNumber(0x0028, 0x0103) )
+ return false; // "Pixel Representation"
+ return true;
+}
+
/**
* \ingroup gdcmHeader
* \brief Determines if the Transfer Syntax was already encountered
if ( !Element )
return false;
LoadHeaderEntrySafe(Element);
-
- std::string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.4.51" )
- return true;
- return false;
+ return ( Element->GetValue() == "1.2.840.10008.1.2.4.51" );
}
/**
LoadHeaderEntrySafe(Element);
std::string Transfer = Element->GetValue();
- if ( Transfer == "1.2.840.10008.1.2.5" )
+ if ( Transfer == "1.2.840.10008.1.2.5" ) {
return true;
+ }
return false;
}
* 0 means the file is NOT USABLE. The caller will have to check
*/
int gdcmHeader::GetXSize(void) {
- // We cannot check for "Columns" because the "Columns" tag is present
- // both in IMG (0028,0011) and OLY (6000,0011) sections of the dictionary.
- std::string StrSize = GetEntryByNumber(0x0028,0x0011);
+ std::string StrSize;
+ StrSize = GetEntryByNumber(0x0028,0x0011);
if (StrSize == GDCM_UNFOUND)
return 0;
return atoi(StrSize.c_str());
* (The file contains a Signal, not an Image).
*/
int gdcmHeader::GetYSize(void) {
- // We cannot check for "Rows" because the "Rows" tag is present
- // both in IMG (0028,0010) and OLY (6000,0010) sections of the dictionary.
std::string StrSize = GetEntryByNumber(0x0028,0x0010);
if (StrSize != GDCM_UNFOUND)
return atoi(StrSize.c_str());
/**
* \ingroup gdcmHeader
- * \brief Recover the offset (from the beginning of the file) of the pixels.
+ * \brief Recover the offset (from the beginning of the file)
+ * \ of *image* pixels (not *icone image* pixels, if any !)
*/
size_t gdcmHeader::GetPixelOffset(void) {
- // If this file complies with the norm we should encounter the
- // "Image Location" tag (0x0028, 0x0200). This tag contains the
+ // We may encounter the 'RETired' (0x0028, 0x0200) tag
+ // (Image Location") . This Element contains the number of
// the group that contains the pixel data (hence the "Pixel Data"
// is found by indirection through the "Image Location").
// Inside the group pointed by "Image Location" the searched element
// is conventionally the element 0x0010 (when the norm is respected).
// When the "Image Location" is absent we default to group 0x7fe0.
+ //
+ // If the element (0x0088,0x0200) 'icone image sequence' is found
+ // (grPixel,numPixel) is stored twice : the first one for the icon
+ // the second one for the image ...
+ // pb : sometimes , (0x0088,0x0200) exists, but doesn't contain *anything*
+ // see gdcmData/MxTwinLossLess.dcm ...
guint16 grPixel;
guint16 numPixel;
std::string ImageLocation = GetEntryByNumber(0x0028, 0x0200);
if ( ImageLocation == GDCM_UNFOUND ) { // Image Location
- grPixel = 0x7fe0;
+ grPixel = 0x7fe0; // default value
} else {
grPixel = (guint16) atoi( ImageLocation.c_str() );
}
- if (grPixel != 0x7fe0)
+
+ if (grPixel == 0xe07f) // sometimes Image Location value doesn't follow
+ grPixel = 0x7fe0; // the supposed processor endianity.
+ // see gdcmData/cr172241.dcm
+
+ if (grPixel != 0x7fe0)
// This is a kludge for old dirty Philips imager.
numPixel = 0x1010;
else
numPixel = 0x0010;
-
- gdcmHeaderEntry* PixelElement = GetHeaderEntryByNumber(grPixel,numPixel);
- if (PixelElement)
+
+ IterHT it = GetHeaderEntrySameNumber(grPixel,numPixel);
+ //std::string icone = GetEntryByNumber(0x0088,0x0200); //icone image sequence
+ TagKey key = gdcmDictEntry::TranslateToKey(grPixel,numPixel);
+ gdcmHeaderEntry* PixelElement;
+
+ if (tagHT.count(key) == 1)
+ PixelElement = (it.first)->second;
+ else
+ PixelElement = (++it.first)->second;
+
+ if (PixelElement) {
return PixelElement->GetOffset();
+ }
else
return 0;
}
-
+// TODO : unify those two (previous one and next one)
/**
* \ingroup gdcmHeader
* \brief Recover the pixel area length (in Bytes)
guint16 grPixel;
guint16 numPixel;
std::string ImageLocation = GetEntryByNumber(0x0028, 0x0200);
- if ( ImageLocation == GDCM_UNFOUND ) {
- grPixel = 0x7fe0;
+ if ( ImageLocation == GDCM_UNFOUND ) { // Image Location
+ grPixel = 0x7fe0; // default value
} else {
grPixel = (guint16) atoi( ImageLocation.c_str() );
}
+ if (grPixel == 0xe07f) // sometimes group doesn't follow
+ grPixel = 0x7fe0; // the supposed processor endianity. see cr172241.dcm
+
if (grPixel != 0x7fe0)
// This is a kludge for old dirty Philips imager.
numPixel = 0x1010;
else
numPixel = 0x0010;
-
- gdcmHeaderEntry* PixelElement = GetHeaderEntryByNumber(grPixel,numPixel);
+
+ IterHT it = GetHeaderEntrySameNumber(grPixel,numPixel);
+ //std::string icone = GetEntryByNumber(0x0088,0x0200); //icone image sequence
+ TagKey key = gdcmDictEntry::TranslateToKey(grPixel,numPixel);
+ gdcmHeaderEntry* PixelElement;
+
+ if (tagHT.count(key) == 1)
+ PixelElement = (it.first)->second;
+ else
+ PixelElement = (++it.first)->second;
+
if (PixelElement)
return PixelElement->GetLength();
- else
+ else {
+ std::cout << "Big trouble : Pixel Element ("
+ << std::hex << grPixel<<","<< numPixel<< ") NOT found"
+ << std::endl;
return 0;
+ }
}
/**
bool gdcmHeader::HasLUT(void) {
// Check the presence of the LUT Descriptors
+
+ // LutDescriptorRed
if ( !GetHeaderEntryByNumber(0x0028,0x1101) )
return false;
// LutDescriptorGreen
// LutDescriptorBlue
if ( !GetHeaderEntryByNumber(0x0028,0x1103) )
return false;
- // It is not enough
- // we check also
+
+ // It is not enough :
+ // we check also
+
+ // Red Palette Color Lookup Table Data
if ( !GetHeaderEntryByNumber(0x0028,0x1201) )
- return false;
+ return false;
+ // Green Palette Color Lookup Table Data
if ( !GetHeaderEntryByNumber(0x0028,0x1202) )
return false;
+ // Blue Palette Color Lookup Table Data
if ( !GetHeaderEntryByNumber(0x0028,0x1203) )
return false;
return true;
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());
- nbitsG =atoi(tokens[2].c_str());
+ 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());
- nbitsB =atoi(tokens[2].c_str());
+ debB =atoi(tokens[1].c_str()); // subscript of the first Lut Value
+ nbitsB =atoi(tokens[2].c_str()); // Lut item size (in Bits)
tokens.clear();
// Load LUTs into memory, (as they were stored on disk)
// if it works, we shall have to check the 3 Palettes
// to see which byte is ==0 (first one, or second one)
// and fix the code
- // We give up the checking to avoid some overhead
+ // We give up the checking to avoid some (useless ?)overhead
+ // (optimistic asumption)
unsigned char *a;
int i;
}
//How to free the now useless LUTs?
-
//free(LutR); free(LutB); free(LutG); // Seg Fault when used
return(LUTRGBA);
}
void gdcmHeader::SetImageDataSize(size_t ImageDataSize) {
std::string content1;
char car[20];
- // Assumes HeaderEntry (0x7fe0, 0x0010) exists ...
+ // Assumes HeaderEntry (0x7fe0, 0x0010) exists ...
+ // TODO define private members PixelGroupNumber, PicxelElementNumber
+ // update them, use them (only necessary for ACR-NEMA, not DICOM)
sprintf(car,"%d",ImageDataSize);
gdcmHeaderEntry *a = GetHeaderEntryByNumber(0x7fe0, 0x0010);
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff