DCMTK: DVPSPresentationLUT Class Reference

DCMTK Version 3.6.9 OFFIS DICOM Toolkit

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Public Member Functions | Private Member Functions | Private Attributes | List of all members
DVPSPresentationLUT Class Reference

the representation of a Presentation LUT Content SQ item for Stored Print More...

## Public Member Functions
| DVPSPresentationLUT ()
| default constructor
| DVPSPresentationLUT (const DVPSPresentationLUT &copy)
| copy constructor
DVPSPresentationLUT * | clone ()
| clone method.
virtual | ~DVPSPresentationLUT ()
| destructor
void | clear ()
| resets the object to initial state.
OFCondition | read (DcmItem &dset, OFBool withSOPInstance)
| reads an Presentation LUT from a DICOM dataset.
OFCondition | write (DcmItem &dset, OFBool withSOPInstance)
| writes the Presentation LUT managed by this object to a DICOM dataset.
OFBool | isInverse ()
| checks whether current presentation LUT is inverse, i.e.
DVPSPresentationLUTType | getType ()
| gets the current Presentation LUT type.
DVPSPrintPresentationLUTAlignment | getAlignment ()
| gets a description of the Presentation LUT in terms of its restrictions for use with a Print SCP that requires Presentation LUT number of entries to match the bit depth of the image pixel data.
OFBool | haveTable ()
| checks if a real Presentation LUT (not shape) is available.
const char * | getCurrentExplanation ()
| gets a description of the current presentation LUT.
const char * | getLUTExplanation ()
| returns the LUT explanation of the presentation LUT if it exists and is non-empty.
const char * | getSOPInstanceUID ()
| returns the SOP instance UID of the presentation LUT if present.
OFCondition | setLUT (DcmUnsignedShort &lutDescriptor, DcmUnsignedShort &lutData, DcmLongString &lutExplanation)
| stores a presentation lookup table and activates it.
OFCondition | setType (DVPSPresentationLUTType newType)
| sets the current Presentation LUT type.
OFCondition | invert ()
| inverts presentation LUT or presentation state LUT shape.
OFBool | activate (DicomImage *image, OFBool printLUT=OFFalse)
| activates the current presentation transform in the given DicomImage.
OFBool | activateInverseLUT (DicomImage *image)
| activates the inverse LUT of the current presentation LUT (if any) in the given DicomImage.
DiLookupTable * | createDiLookupTable ()
| creates a DiLookupTable instance from the LUT table managed by this object.
OFBool | compareDiLookupTable (DiLookupTable *lut)
| compares a DiLookupTable instance with the LUT table managed by this object.
OFCondition | setSOPInstanceUID (const char *value)
| sets the SOP instance UID.
OFBool | isLegalPrintPresentationLUT ()
| checks whether the current Presentation LUT (or shape) is legal when used with Supplement 22.
OFBool | matchesImageDepth (OFBool is12bit)
| checks whether the current Presentation LUT (or shape) matches the current image bit depth in number of entries and first value mapped.
OFBool | printSCPCreate (DcmDataset *rqDataset, T_DIMSE_Message &rsp, DcmDataset *&rspDataset, OFBool matchRequired, OFBool supports12Bit)
| performs a Print SCP N-CREATE operation on a newly created instance of this class.

## Private Member Functions
DVPSPresentationLUT & | operator= (const DVPSPresentationLUT &)
| private undefined assignment operator

## Private Attributes
DVPSPresentationLUTType | presentationLUT
| describes active type of presentation LUT.
DcmUnsignedShort | presentationLUTDescriptor
| Module=Softcopy_Presentation_LUT, VR=xs, VM=3, Type 1c.
DcmLongString | presentationLUTExplanation
| Module=Softcopy_Presentation_LUT, VR=LO, VM=1, Type 3.
DcmUnsignedShort | presentationLUTData
| Module=Softcopy_Presentation_LUT, VR=xs, VM=1-n, Type 1c.
DcmUniqueIdentifier | sOPInstanceUID
| Module=Presentation_LUT_List, VR=UI, VM=1, Type 1.

## Detailed Description

the representation of a Presentation LUT Content SQ item for Stored Print

## Member Function Documentation

## ◆ activate()

OFBool DVPSPresentationLUT::activate | ( | DicomImage * | image,
|  | OFBool | printLUT = OFFalse )

activates the current presentation transform in the given DicomImage.

Parameters

  image | the DicomImage for which the presentation transform is to be set.
  printLUT | OFTrue if presentation LUT is activated for print bitmap rendering (in this case there is no implicit scaling of the input width of the LUT and, therefore, the VOI transformation - which is absent for print - is used), OFFalse otherwise (softcopy rendering, default)

Returns
  OFTrue if successful, OFFalse otherwise.

## ◆ activateInverseLUT()

OFBool DVPSPresentationLUT::activateInverseLUT | ( | DicomImage * | image | ) |

activates the inverse LUT of the current presentation LUT (if any) in the given DicomImage.

Presentation LUT shape is not supported by this method.

Parameters

  image | the DicomImage for which the inverse presentation LUT is to be set.

Returns
  OFTrue if successful, OFFalse otherwise.

## ◆ clear()

void DVPSPresentationLUT::clear | ( |  | ) |

resets the object to initial state.

After this call, the object is in the same state as after creation with the default constructor.

## ◆ clone()

DVPSPresentationLUT * DVPSPresentationLUT::clone | ( |  | ) |
| inline

clone method.

Returns
  a pointer to a new DVPSPresentationLUT object containing a copy of this object.

References DVPSPresentationLUT().

## ◆ compareDiLookupTable()

OFBool DVPSPresentationLUT::compareDiLookupTable | ( | DiLookupTable * | lut | ) |

compares a DiLookupTable instance with the LUT table managed by this object.

Returns OFTrue if equal, OFFalse otherwise.

Parameters

  lut | DiLookupTable object to compare with

Returns
  comparison, true if equal

## ◆ createDiLookupTable()

DiLookupTable * DVPSPresentationLUT::createDiLookupTable | ( |  | ) |

creates a DiLookupTable instance from the LUT table managed by this object.

The returned object must be freed by the caller.

Returns
  new DiLookupTable object, may be NULL if no LUT present.

## ◆ getAlignment()

DVPSPrintPresentationLUTAlignment DVPSPresentationLUT::getAlignment | ( |  | ) |

gets a description of the Presentation LUT in terms of its restrictions for use with a Print SCP that requires Presentation LUT number of entries to match the bit depth of the image pixel data.

Returns
  the current presentation LUT alignment type

## ◆ getCurrentExplanation()

const char * DVPSPresentationLUT::getCurrentExplanation | ( |  | ) |

gets a description of the current presentation LUT.

For well-known presentation LUT shapes, a standard text is returned. For presentation LUTs, the LUT explanation is returned if it exists and a standard text otherwise. This method never returns NULL.

Returns
  a pointer to a string describing the current presentation LUT.

## ◆ getLUTExplanation()

const char * DVPSPresentationLUT::getLUTExplanation | ( |  | ) |

returns the LUT explanation of the presentation LUT if it exists and is non-empty.

Otherwise returns NULL.

Returns
  a string pointer

## ◆ getSOPInstanceUID()

const char * DVPSPresentationLUT::getSOPInstanceUID | ( |  | ) |

returns the SOP instance UID of the presentation LUT if present.

Otherwise returns NULL.

Returns
  a string pointer

## ◆ getType()

DVPSPresentationLUTType DVPSPresentationLUT::getType | ( |  | ) |
| inline

gets the current Presentation LUT type.

Returns
  the current presentation LUT type

References presentationLUT.

## ◆ haveTable()

OFBool DVPSPresentationLUT::haveTable | ( |  | ) |

checks if a real Presentation LUT (not shape) is available.

Returns
  OFTrue if this object contains a presentation LUT, no matter if it is activated or not. Returns OFFalse otherwise.

## ◆ invert()

OFCondition DVPSPresentationLUT::invert | ( |  | ) |

inverts presentation LUT or presentation state LUT shape.

Returns
  EC_Normal upon success, an error code otherwise.

## ◆ isInverse()

OFBool DVPSPresentationLUT::isInverse | ( |  | ) |

checks whether current presentation LUT is inverse, i.e.

shape is INVERSE or first LUT entry larger than last LUT entry.

## ◆ isLegalPrintPresentationLUT()

OFBool DVPSPresentationLUT::isLegalPrintPresentationLUT | ( |  | ) |

checks whether the current Presentation LUT (or shape) is legal when used with Supplement 22.

Returns
  true if current Presentation LUT is legal for print.

## ◆ matchesImageDepth()

OFBool DVPSPresentationLUT::matchesImageDepth | ( | OFBool | is12bit | ) |

checks whether the current Presentation LUT (or shape) matches the current image bit depth in number of entries and first value mapped.

Parameters

  is12bit | true if the image is 12 bit, false if the image is 8 bit

Returns
  true if Presentation LUT matches, false otherwise.

## ◆ printSCPCreate()

OFBool DVPSPresentationLUT::printSCPCreate | ( | DcmDataset * | rqDataset,
|  | T_DIMSE_Message & | rsp,
|  | DcmDataset *& | rspDataset,
|  | OFBool | matchRequired,
|  | OFBool | supports12Bit )

performs a Print SCP N-CREATE operation on a newly created instance of this class.

The results of the operation are stored in the objects passed as rsp and rspDataset.

Parameters

  rqDataset | N-CREATE request dataset, may be NULL
  rsp | N-CREATE response message
  rspDataset | N-CREATE response dataset passed back in this parameter
  matchRequired | boolean flag specifying whether the SCP should enforce a rule that all Presentation LUTs must match with the bit depth of the image pixel data.
  supports12Bit | boolean flag specifying whether the SCP should allow 12 bit/pixel image data transmission. Affects handling of matching rule.

Returns
  OFTrue if operation was successful, OFFalse otherwise.

## ◆ read()

OFCondition DVPSPresentationLUT::read | ( | DcmItem & | dset,
|  | OFBool | withSOPInstance )

reads an Presentation LUT from a DICOM dataset.

The DICOM elements of the referenced item are copied from the dataset to this object. The completeness of the item (presence of all required elements, value multiplicity) is checked. If this method returns an error code, the object is in undefined state afterwards.

Parameters

  dset | the item of the PresentationLUTContentSequence from which the data is to be read
  withSOPInstance | true if SOPinstanceUID should be read (when used with Stored Print).

Returns
  EC_Normal if successful, an error code otherwise.

## ◆ setLUT()

OFCondition DVPSPresentationLUT::setLUT | ( | DcmUnsignedShort & | lutDescriptor,
|  | DcmUnsignedShort & | lutData,
|  | DcmLongString & | lutExplanation )

stores a presentation lookup table and activates it.

The LUT is copied. If the method returns EC_Normal, any old presentation LUT is overwritten. If the method returns an error code, an old LUT is left unchanged.

Parameters

  lutDescriptor | the LUT Descriptor in DICOM format (VM=3)
  lutData | the LUT Data in DICOM format
  lutExplanation | the LUT Explanation in DICOM format, may be empty.

Returns
  EC_Normal if successful, an error code otherwise.

## ◆ setSOPInstanceUID()

OFCondition DVPSPresentationLUT::setSOPInstanceUID | ( | const char * | value | ) |

sets the SOP instance UID.

Parameters

  value | new attribute value, must not be NULL.

Returns
  EC_Normal if successful, an error code otherwise.

## ◆ setType()

OFCondition DVPSPresentationLUT::setType | ( | DVPSPresentationLUTType | newType | ) |

sets the current Presentation LUT type.

DVPSP_table can only be used if the object contains a lookup table, i.e. if haveTable() returns OFTrue.

Parameters

  newType | the new presentation LUT type.

Returns
  EC_Normal if successful, an error code otherwise.

## ◆ write()

OFCondition DVPSPresentationLUT::write | ( | DcmItem & | dset,
|  | OFBool | withSOPInstance )

writes the Presentation LUT managed by this object to a DICOM dataset.

Copies of the DICOM element managed by this object are inserted into the DICOM dataset.

Parameters

  dset | the the item of the PresentationLUTContentSequence to which the data is written
  withSOPInstance | true if SOPinstanceUID should be written (when used with Stored Print).

Returns
  EC_Normal if successful, an error code otherwise.

The documentation for this class was generated from the following file:

- dcmpstat/include/dcmtk/dcmpstat/dvpspl.h

Generated on Sat Mar 1 2025 for DCMTK Version 3.6.9 by Doxygen 1.13.2