LDicomDS::SetImageList

#include "Ltdic.h"

L_UINT16 LDicomDS::SetImageList(pElement, hList, nCompression, nPhotometric, nBitsPerPixel, nQFactor, uFlags)

Replaces the images in a Pixel Data element with images in an image list.

Parameters

pDICOMELEMENT pElement

Pointer to a DICOMELEMENT structure within the Data Set.

HBITMAPLIST hList

Handle to the list of images.

L_INT32 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.

L_INT32 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, palletized color image.
IMAGE_PHOTOMETRIC_RGB [0x03] 24-bits per pixel, RGB color image.

L_INT32 nBitsPerPixel

Resulting image pixel depth. The following are valid values:

Value Meaning
0 Keep the original file's pixel depth (Do not convert).
1 to 8 The specified bits per pixel in the resulting image
12 12 bits per pixel in the resulting image.
16 16 bits per pixel in the resulting image
24 24 bits per pixel in the resulting image
32 32 bits per pixel in the resulting image

L_INT32 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.

L_UINT uFlags

Flags which control the behaviour of this function. Possible values are:

Value Meaning
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 either IMAGE_COMPRESSION_NONE or 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).
DICOM_SETIMAGE_OPTIMIZED_MEMORY [0x00000200] If set, the function will try to save memory usage and utilize disk space instead.

Returns

Value Meaning
0 SUCCESS
>0 An error occurred. Refer to Return Codes.

Comments

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

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 LDicomDS::DeleteImage and LDicomDS::InsertImage.

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 LDicomDS::SetJ2KOptions.

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 functions LDicomDS::SetImage or [LDicomDS:SetImageList, 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

NOTES:

Required DLLs and Libraries

Platforms

Win32, x64

See Also

Functions

Topics

Example

This example sets a multi-frame image in Data Set.

L_INT LDicomDS_SetImageListExample(HBITMAPLIST hList) 
{ 
   L_INT          nRet; 
   LDicomDS      *pDS; 
   pDICOMELEMENT  pElement; 
 
   pDS = new LDicomDS(NULL); 
 
   nRet = pDS->LoadDS(MAKE_IMAGE_PATH(TEXT("image1.dcm")), 0); 
   if(nRet != DICOM_SUCCESS) 
      return nRet; 
 
   pElement = pDS->FindFirstElement(NULL, TAG_PIXEL_DATA, FALSE); 
   if (pElement != NULL) 
   { 
      nRet = pDS->SetImageList(pElement, hList, IMAGE_COMPRESSION_JPEG_LOSSLESS, 
                        IMAGE_PHOTOMETRIC_RGB, 0, 0, DICOM_SETIMAGE_AUTO_SET_VOI_LUT); 
      if(nRet != DICOM_SUCCESS) 
         return nRet; 
   } 
 
   delete pDS; 
 
   return DICOM_SUCCESS; 
} 

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