L_DicomSetImage

#include "Ltdic.h"

L_LTDIC_API L_UINT16 L_DicomSetImage(hDS, pElement, pBitmap, nCompression, nPhotometric, nBitsPerPixel, nQFactor, uFlags, pfnCallback, pUserData)

HDICOMDS hDS;

a DICOM handle

pDICOMELEMENT pElement;

pointer to a DICOMELEMENT structure

pBITMAPHANDLE pBitmap;

pointer to the bitmap handle

L_INT32 nCompression;

compression type

L_INT32 nPhotometric;

photometric constant

L_INT32 nBitsPerPixel;

resulting bitmap pixel depth

L_INT32 nQFactor;

quality factor

L_UINT uFlags;

flags.

FILESAVECALLBACK pfnCallback;

optional callback function

L_VOID *pUserData;

pointer to more parameters for the callback

Replaces the image(s) in a Pixel Data element.

Parameter Description
hDS A DICOM handle.
pElement Pointer to a DICOMELEMENT structure within the Data Set.
pBitmap Pointer to the bitmap handle that references the image to set.
nCompression Value that indicates the type of compression to use, which are affect the way the image is compressed when call the function. Possible values are:
  Value Meaning
  IMAGE_COMPRESSION_NONE [0x00] No compression.
  IMAGE_COMPRESSION_RLE [0x01] RLE compression.
  IMAGE_COMPRESSION_JPEG_LOSSLESS [0x02] JPEG LossLess compression.
  IMAGE_COMPRESSION_JPEG_LOSSY [0x03] JPEG Lossy compression.
  IMAGE_COMPRESSION_J2K_LOSSLESS [0x06] JPEG 2000 lossless compression.
  IMAGE_COMPRESSION_J2K_LOSSY [0x07] JPEG 2000 Lossy compression.
  IMAGE_COMPRESSION_MPEG2 [0x08] INTERNAL USE ONLY. MPEG-2 compression. Internally used to read/write DICOM files with the LEADTOOLS Medical Multimedia Module. For more information on these filters, refer to LEAD DICOM Reader and LEAD DICOM Writer.
  IMAGE_COMPRESSION_MPEG2_HD [0x09] INTERNAL USE ONLY. MPEG-2 compression. Internally used to read/write DICOM files with the LEADTOOLS Medical Multimedia Module. For more information on these filters, refer to LEAD DICOM Reader and LEAD DICOM Writer.
nPhotometric Photometric constant. Possible values are:
  Value Meaning
  IMAGE_PHOTOMETRIC_MONOCHROME2 [0x01] 8- or 16-bits per pixel, grayscale image.
  IMAGE_PHOTOMETRIC_PALETTE_COLOR [0x02] 8-bits per pixel, palettized color image.
  IMAGE_PHOTOMETRIC_RGB [0x03] 24-bits per pixel, RGB color image.
nBitsPerPixel Resulting bitmap pixel depth. Possible values are:
  Value Meaning
  0 Keep the original file's pixel depth (Do not convert).
  1 to 8 The specified bits per pixel in the resultant bitmap
  12 12 bits per pixel in the resultant bitmap.
  16 16 bits per pixel in the resultant bitmap
  24 24 bits per pixel in the resultant bitmap
  32 32 bits per pixel in the resultant bitmap
nQFactor The quality factor (Q factor) is a number that determines the degree of loss in the compression process. You can set a value from 2 to 255, where 2 is the highest quality and 255 is the most compression.
uFlags Flags which control the behaviour of this function. Possible values are:
  Value Meaning
  DICOM_SETIMAGE_AUTO_SAVE_OVERLAYS [0x0001]If set, the function will automatically insert the overlays associated with the input bitmap into the dataset.
  DICOM_SETIMAGE_AUTO_SET_VOI_LUT [0x0002]If set, the function will automatically add a VOI LUT to the dataset.
  DICOM_SETIMAGE_MINIMIZE_JPEG_SIZE [0x0004] If set, and the nCompression parameter is IMAGE_COMPRESSION_JPEG_LOSSLESS or IMAGE_COMPRESSION_JPEG_LOSSY, the JPEG compression engine will use optimized Huffman tables, which results in better compression, but slower speed.
  DICOM_SETIMAGE_MFG_OVERWRITE_SHARED [0x0008] This flag is ignored.
  DICOM_SETIMAGE_MFG_VOI_LUT_PER_FRAME [0x0010] The Frame VOI LUT Sequence is added under the Per-frame Functional Groups Sequence.
  DICOM_SETIMAGE_MFG_VOI_LUT_SHARED [0x0020] The Frame VOI LUT Sequence is added under the Shared Functional Groups Sequence.
  DICOM_SETIMAGE_MFG_MODALITY_LUT_PER_FRAME [0x0040] The Pixel Value Transformation Sequence is added under the Per-frame Functional Groups Sequence.
  DICOM_SETIMAGE_MFG_MODALITY_LUT_SHARED [0x0080] The Pixel Value Transformation Sequence is added under the Shared Functional Groups Sequence.
  DICOM_SETIMAGE_YBR_FULL [0x00000100] This flag is valid only for color images, and if nCompression  is one of the following:
  • IMAGE_COMPRESSION_NONE

  • IMAGE_COMPRESSION_RLE

It is ignored for all other transfer syntax values.  If set, this converts the RGB image data to YCbCr, which is one luminance (Y) and two chrominance planes (CB and CR).

pfnCallback Optional callback function for additional processing.
  • If you do not provide a callback function, use NULL as the value of this parameter.

  • If you do provide a callback function, use the function pointer as the value of this parameter.

  The callback function must adhere to the function prototype described in FILESAVECALLBACK Function.
pUserData Void pointer that you can use to pass one or more additional parameters that the callback function needs.
  To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID. The callback function, which receives the address in its own pUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure.
  If the additional parameters are not needed, you can pass NULL in this parameter.

Returns

DICOM_SUCCESS

The function was successful.

>0

An error occurred. Refer to Return Codes.

Comments

This function replaces all the images in the Pixel Data Element with the image referenced by pBitmap.

Most DICOM files will only have one Data Element of type TAG_PIXEL_DATA. Therefore, in most instances you can set pElement to NULL, since the function will automatically replace the images of the only Pixel Data Element in the file. If pElement is not NULL, it must point to the Pixel Data Element itself.

If the DICOM file is CLASS_BASIC_DIRECTORY, the file may contain more than one Pixel Data Element. In this case you must specify in pElement the Pixel Data Element in which the images will be replaced.

If you wish to replace only one image within the Pixel Data Element, you must use L_DicomDeleteImage and L_DicomInsertImage.

For a table of possible Compression, Photometric, BitsPerPixel, and Quality Factor combinations, refer to Compression Table.

For more options when using the JPEG 2000 compression, refer to L_DicomSetJ2KOptions.

This function will either insert, delete or update one or more of the following elements:

Tag

Name

(7FE0,0010)

Pixel Data

(0002,0010)

Transfer Syntax UID

(0028,0101)

Bits Stored

(0028,0100)

Bits Allocated

(0028,0102)

High Bit

(0028,0103)

Pixel Representation

(0028,0010)

Rows

(0028,0011)

Columns

(0028,0002)

Samples per Pixel

(0028,0006)

Planar Configuration

(0028,0004)

Photometric Interpretation

(0028,0106)

Smallest Image Pixel Value

(0028,0107)

Largest Image Pixel Value

(0028,1101)

Red Palette Color Lookup Table Descriptor

(0028,1102)

Green Palette Color Lookup Table Descriptor

(0028,1103)

Blue Palette Color Lookup Table Descriptor

(0028,1201)

Red Palette Color Lookup Table Data

(0028,1202)

Green Palette Color Lookup Table Data

(0028,1203)

Blue Palette Color Lookup Table Data

(0028,1199)

Palette Color Lookup Table UID

(0028,1052)

Rescale Intercept

(0028,1053)

Rescale Slope

(0028,1054)

Rescale Type

(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

(0028,3010)

VOI LUT Sequence

(0028,1050)

Window Center

(0028,1051)

Window Width

(0028,1055)

Window Center & Width Explanation

(0028,0008)

Number of Frames

(0054,0070)

Time Slot Vector

(5200,9229)

Shared Functional Groups Sequence

(5200,9230)

Per-frame Functional Groups Sequence

If the Shared Functional Groups Sequence element or the Per-frame Functional Groups Sequence element is added, an item child element may be added that contains either the (0028,9132) Frame VOI LUT Sequence element or the (0028,9145) Pixel Value Transformation Sequence element.

(0028,9132) Frame VOI LUT Sequence Child Elements

Tag

Name

(0028,1050)

Window Center

(0028,1051)

Window Width

(0028,1055)

Window Center & Width Explanation

(0028,9145) Pixel Value Transformation Sequence child elements

Tag

Name

(0028,1052)

Rescale Intercept

(0028,1053)

Rescale Slope

(0028,1054)

Rescale Type

This function is indifferent to the pixel data restrictions imposed by the various DICOM IOD classes, for example this function will allow the user to insert a colored image into a "Digital X-Ray Image Storage" dataset.

This function will always insert a "Number of Frames" (0028, 0008) element and set its value.

The Multi-frame Functional Groups module may have a Shared Functional Groups Sequence item, and/or a Per-frame Functional Groups Sequence item. Either of these items may have a Pixel Value Transformation Sequence (0028,9145) item, or a Frame VOI LUT Sequence (0028,9132) item.

When calling the methods L_DicomSetImage or L_DicomSetImageList, the five DICOM_SETIMAGE_MFG replace existing information in the Pixel Value Transformation Sequence or the Frame VOI LUT Sequence.

and  any existing Shared Functional Groups Sequence items, and Per-frame Functional Groups Sequence items will be removed.

Any new sequences are placed in the sequence indicated by the flag (Per-frame Functional Groups Sequence or Shared Functional Groups Sequence).

For a detailed discussion on Multi-frame Functional Groups and how the DICOM_SET_IMAGE_MFG flags are used, see the topic Multi-frame Functional Groups.

Note:

DICOM_SETIMAGE_MFG_VOI_LUT_PER_FRAME cannot be combined with DICOM_SETIMAGE_MFG_VOI_LUT_SHARED.

DICOM_SETIMAGE_MFG_MODALITY_LUT_PER_FRAME cannot be combined with DICOM_SETIMAGE_MFG_MODALITY_LUT_SHARED.

Note that the only valid values are for nPhotometric are:

All other values are ignored.

The nPhotometric  parameter is used as an indicator as how the data image data will be saved: gray, color, or palletized. The nPhotometric parameter is NOT necessarily going to be the final value of the Photometric Interpretation that is stored in the resulting DICOM dataset.  The resulting Photometric Interpretation in the DICOM dataset is set automatically, based on the compression type, flags, and QFactor.  The table below gives examples of the resulting DICOM dataset Photometric Interpretation, based on various input parameters:

nCompression

nPhotometric

uFlags

nQFactor

Resulting Photometric Interpretation in DICOM data set

IMAGE_COMPRESSION_NONE

IMAGE_PHOTOMETRIC_MONOCHROME2

0

0

MONOCHROME2

IMAGE_COMPRESSION_NONE

IMAGE_PHOTOMETRIC_RGB

0

0

RGB

IMAGE_COMPRESSION_RLE

IMAGE_PHOTOMETRIC_RGB

DICOM_SETIMAGE_YBR_FULL

0

YBR_FULL

IMAGE_COMPRESSION_JPEG_LOSSY

IMAGE_PHOTOMETRIC_RGB

0

40

YBR_FULL_422

IMAGE_COMPRESSION_JPEG_LOSSY

IMAGE_PHOTOMETRIC_RGB

0

2

YBR_FULL

IMAGE_COMPRESSION_JPEG_LOSSLESS

IMAGE_PHOTOMETRIC_RGB

0

0

RGB

IMAGE_COMPRESSION_J2K_LOSSLESS

IMAGE_PHOTOMETRIC_RGB

0

0

YBR_RCT

IMAGE_COMPRESSION_J2K_LOSSY

IMAGE_PHOTOMETRIC_RGB

0

0

YBR_ICT

Note: There is no high level function to embed MPEG2 into a DICOM dataset. The Multimedia toolkit (DICOM writer) can create DICOM files with MPEG2 compression.

Note: This function cannot be used to encode DICOM transfer syntaxes (e.g. video compression support) that are not part of the main medical SDK and it is supported only via the LEADTOOLS Medical Multimedia Module.

Required DLLs and Libraries

LTDIC

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

Platforms

Win32, x64, Linux.

See Also

Functions:

L_DicomGetImage, L_DicomGetImageList, L_DicomInsertImage, L_DicomInsertImageList, L_DicomSetImageList

Topics:

Working with Data Sets

Example

This example sets an image in Data Set

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_LTDICTEX_API L_INT DicomSetImageExample(pBITMAPHANDLE pBitmap) 
{ 
   HDICOMDS      hDS; 
   pDICOMELEMENT pElement; 
   L_UINT16 nRet; 
   hDS = L_DicomCreateDS(NULL); 
   nRet = L_DicomLoadDS(hDS, MAKE_IMAGE_PATH(TEXT("Image1.dcm")), 0); 
   if (nRet != DICOM_SUCCESS) 
   { 
      L_DicomFreeDS(hDS); 
      return nRet; 
   } 
   pElement = L_DicomFindFirstElement(hDS, NULL, TAG_PIXEL_DATA, FALSE); 
   if (pElement != NULL) 
   { 
      nRet = L_DicomSetImage(hDS, pElement, pBitmap, IMAGE_COMPRESSION_NONE, 
      IMAGE_PHOTOMETRIC_MONOCHROME1, 0, 0, DICOM_SETIMAGE_AUTO_SET_VOI_LUT, NULL, NULL); 
      if (nRet != DICOM_SUCCESS) 
      { 
         L_DicomFreeDS(hDS); 
         return nRet; 
      } 
   } 
   L_DicomFreeDS(hDS); 
   return DICOM_SUCCESS; 
} 

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