LEADTOOLS DICOM C++ Class Library Help
| LEADTOOLS DICOM C++ Class Library Help > Classes and Member Functions > LDicomDS > LDicomDS Class Members > LDicomDS::SetImageList |
#include "Ltdic.h"
L_UINT16 LDicomDS::SetImageList(pElement, hList, nCompression, nPhotometric, nBitsPerPixel, nQFactor, uFlags)
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pDICOMELEMENT pElement; |
/* pointer to a DICOMELEMENT structure */ |
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HBITMAPLIST hList; |
/* handle to the list of images */ |
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L_INT32 nCompression; |
/* compression type */ |
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L_INT32 nPhotometric; |
/* photometric constant */ |
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L_INT32 nBitsPerPixel; |
/* resulting bitmap pixel depth */ |
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L_INT32 nQFactor; |
/* quality factor */ |
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L_UINT uFlags; |
/* flags */ |
Replaces the images in a Pixel Data element with images in an image list.
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Parameter |
Description |
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pElement |
Pointer to a DICOMELEMENT structure within the Data Set. |
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hList |
Handle to the list of images. |
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nCompression |
Value that indicates the type of compression to use. Possible values are: |
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Value |
Meaning |
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IMAGE_COMPRESSION_NONE |
[0x00] No compression. |
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IMAGE_COMPRESSION_RLE |
[0x01] RLE compression. |
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IMAGE_COMPRESSION_JPEG_LOSSLESS |
[0x02] JPEG LossLess compression. |
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IMAGE_COMPRESSION_JPEG_LOSSY |
[0x03] JPEG Lossy compression. |
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IMAGE_COMPRESSION_J2K_LOSSLESS |
[0x06] JPEG 2000 lossless compression. |
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IMAGE_COMPRESSION_J2K_LOSSY |
[0x07] JPEG 2000 lossy compression. |
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nPhotometric |
Photometric constant. Possible values are: |
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Value |
Meaning |
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IMAGE_PHOTOMETRIC_MONOCHROME2 |
[0x01] 8- or 16-bits per pixel, grayscale image. |
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IMAGE_PHOTOMETRIC_PALETTE_COLOR |
[0x02] 8-bits per pixel, palletized color image. |
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IMAGE_PHOTOMETRIC_RGB |
[0x03] 24-bits per pixel, RGB color image. |
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nBitsPerPixel |
Resulting image pixel depth. The following are valid values: |
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Value |
Meaning |
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0 |
Keep the original file's pixel depth (Do not convert). |
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1 to 8 |
The specified bits per pixel in the resulting image |
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12 |
12 bits per pixel in the resulting image. |
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16 |
16 bits per pixel in the resulting image |
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24 |
24 bits per pixel in the resulting image |
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32 |
32 bits per pixel in the resulting image |
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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. |
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uFlags |
Flags which control the behaviour of this function. Possible values are: |
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Value |
Meaning |
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DICOM_SETIMAGE_AUTO_SET_VOI_LUT |
[0x0002]If set, the function will automatically add a VOI LUT to the dataset. |
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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. |
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DICOM_SETIMAGE_MFG_OVERWRITE_SHARED |
[0x0008] This flag is ignored. |
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DICOM_SETIMAGE_MFG_VOI_LUT_PER_FRAME |
[0x0010] The Frame VOI LUT Sequence is added under the Per-frame Functional Groups Sequence. |
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DICOM_SETIMAGE_MFG_VOI_LUT_SHARED |
[0x0020] The Frame VOI LUT Sequence is added under the Shared Functional Groups Sequence. |
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DICOM_SETIMAGE_MFG_MODALITY_LUT_PER_FRAME |
[0x0040] The Pixel Value Transformation Sequence is added under the Per-frame Functional Groups Sequence. |
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DICOM_SETIMAGE_MFG_MODALITY_LUT_SHARED |
[0x0080] The Pixel Value Transformation Sequence is added under the Shared Functional Groups Sequence. |
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DICOM_SETIMAGE_YBR_FULL |
[0x00000100] This flag is valid only for color images, and if nCompression is one of the following:
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). |
Returns
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0 |
SUCCESS |
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>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:
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Tag |
Name |
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(7FE0,0010) |
Pixel Data |
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(0002,0010) |
Transfer Syntax UID |
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(0028,0101) |
Bits Stored |
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(0028,0100) |
Bits Allocated |
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(0028,0102) |
High Bit |
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(0028,0103) |
Pixel Representation |
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(0028,0010) |
Rows |
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(0028,0011) |
Columns |
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(0028,0002) |
Samples per Pixel |
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(0028,0006) |
Planar Configuration |
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(0028,0004) |
Photometric Interpretation |
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(0028,0106) |
Smallest Image Pixel Value |
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(0028,0107) |
Largest Image Pixel Value |
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(0028,1101) |
Red Palette Color Lookup Table Descriptor |
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(0028,1102) |
Green Palette Color Lookup Table Descriptor |
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(0028,1103) |
Blue Palette Color Lookup Table Descriptor |
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(0028,1201) |
Red Palette Color Lookup Table Data |
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(0028,1202) |
Green Palette Color Lookup Table Data |
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(0028,1203) |
Blue Palette Color Lookup Table Data |
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(0028,1199) |
Palette Color Lookup Table UID |
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(0028,1052) |
Rescale Intercept |
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(0028,1053) |
Rescale Slope |
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(0028,1054) |
Rescale Type |
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(0028,1221) |
Segmented Red Palette Color Lookup Table Data |
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(0028,1222) |
Segmented Green Palette Color Lookup Table Data |
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(0028,1223) |
Segmented Blue Palette Color Lookup Table Data |
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(0028,3010) |
VOI LUT Sequence |
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(0028,1050) |
Window Center |
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(0028,1051) |
Window Width |
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(0028,1055) |
Window Center & Width Explanation |
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(0028,0008) |
Number of Frames |
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(0054,0070) |
Time Slot Vector |
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(5200,9229) |
Shared Functional Groups Sequence |
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(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
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Tag |
Name |
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(0028,1050) |
Window Center |
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(0028,1051) |
Window Width |
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(0028,1055) |
Window Center & Width Explanation |
(0028,9145) Pixel Value Transformation Sequence child elements
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Tag |
Name |
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(0028,1052) |
Rescale Intercept |
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(0028,1053) |
Rescale Slope |
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(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 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.
DICOM_SETIMAGE_MFG_VOI_LUT_PER_FRAME
DICOM_SETIMAGE_MFG_VOI_LUT_SHARED
DICOM_SETIMAGE_MFG_MODALITY_LUT_PER_FRAME
DICOM_SETIMAGE_MFG_MODALITY_LUT_SHARED
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:
IMAGE_PHOTOMETRIC_MONOCHROME2 (gray)
IMAGE_PHOTOMETRIC_PALETTE_COLOR (palletized)
IMAGE_PHOTOMETRIC_RGB (Color)
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:
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nCompression |
nPhotometric |
uFlags |
nQFactor |
Resulting Photometric Interpretation in DICOM data set |
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IMAGE_COMPRESSION_NONE |
IMAGE_PHOTOMETRIC_MONOCHROME2 |
0 |
0 |
MONOCHROME2 |
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IMAGE_COMPRESSION_NONE |
IMAGE_PHOTOMETRIC_RGB |
0 |
0 |
RGB |
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IMAGE_COMPRESSION_RLE |
IMAGE_PHOTOMETRIC_RGB |
DICOM_SETIMAGE_YBR_FULL |
0 |
YBR_FULL |
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IMAGE_COMPRESSION_JPEG_LOSSY |
IMAGE_PHOTOMETRIC_RGB |
0 |
40 |
YBR_FULL_422 |
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IMAGE_COMPRESSION_JPEG_LOSSY |
IMAGE_PHOTOMETRIC_RGB |
0 |
2 |
YBR_FULL |
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IMAGE_COMPRESSION_JPEG_LOSSLESS |
IMAGE_PHOTOMETRIC_RGB |
0 |
0 |
RGB |
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IMAGE_COMPRESSION_J2K_LOSSLESS |
IMAGE_PHOTOMETRIC_RGB |
0 |
0 |
YBR_RCT |
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IMAGE_COMPRESSION_J2K_LOSSY |
IMAGE_PHOTOMETRIC_RGB |
0 |
0 |
YBR_ICT |
Required DLLs and Libraries
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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 |
Win32, x64
See Also
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Functions: |
LDicomDS::GetImage, LDicomDS::GetImageList, LDicomDS::InsertImage, LDicomDS::InsertImageList, LDicomDS::SetImage |
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Topics: |
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How to Disable the Automatic Loading of the default DICOM IOD Table |
Example
This example sets a multi-frame image in a Data Set.
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName
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;
}
