LDicomDS::GetImageList
#include "Ltdic.h"
L_UINT16 LDicomDS::GetImageList(pElement, hList, nIndex, nCount, nBitsPerPixel, nOrder, uFlags)
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pDICOMELEMENT pElement; |
/* pointer to a DICOMELEMENT structure */ |
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HBITMAPLIST hList; |
/* handle to the list of bitmaps */ |
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L_UINT32 nIndex; |
/* index value */ |
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L_UINT32 nCount; |
/* number of frames to load */ |
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L_INT32 nBitsPerPixel; |
/* resulting bitmap pixel depth */ |
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L_INT32 nOrder; |
/* desired color order */ |
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L_UINT uFlags; |
/* flags */ |
Loads the bitmap list with frames from a Pixel Data element.
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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 bitmaps. |
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nIndex |
Position of the first frame to load. Use zero-based indexing. For example, if there are 10 bitmaps in a list, the index of the last one is 9. |
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nCount |
Number of frames to load into the bitmap list. |
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nBitsPerPixel |
Resulting bitmap 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 resultant bitmap |
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12 |
12 bits per pixel in the resultant bitmap. |
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16 |
16 bits per pixel in the resultant bitmap |
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24 |
24 bits per pixel in the resultant bitmap |
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32 |
32 bits per pixel in the resultant bitmap |
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nOrder |
The desired color order. Possible values are: |
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Value |
Meaning |
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ORDER_RGB |
[0] Red-green-blue order. |
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ORDER_BGR |
[1] Blue-green-red order. |
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ORDER_GRAY |
[2] 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are only supported in the Document/Medical toolkits. |
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ORDER_RGBORGRAY |
[3] Load the image as red, green, blue OR as a 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are supported in the Document/Medical toolkits only. |
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ORDER_BGRORGRAY |
[4] Load the image as blue, green, red OR as a 12 or 16-bit grayscale image. 12 and 16-bit grayscale images are supported in the Document/Medical toolkits only. |
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0 |
The data is 8 bits per pixel or less. |
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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_GETIMAGE_AUTO_LOAD_OVERLAYS |
[0x0001] If set, the function will automatically extract the overlays included in the dataset and add them to the loaded bitmap. |
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DICOM_GETIMAGE_AUTO_APPLY_MODALITY_LUT |
[0x0002] If set, the function will automatically apply the "Modality LUT" when loading the bitmap. |
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DICOM_GETIMAGE_AUTO_APPLY_VOI_LUT |
[0x0004] If set, the function will automatically apply the "VOI LUT" when loading the bitmap. |
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DICOM_GETIMAGE_ALLOW_RANGE_EXPANSION |
[0x0008] If set, the function will adjust the high bit and/or low bit (if possible) inside the bitmap handle in order to hold the range of pixel values after applying the modality LUT. |
Returns
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0 |
SUCCESS |
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>0 |
An error occurred. Refer to Return Codes. |
Comments
As an example, if you wish to load 50 images starting with the 50th frame in the Pixel Data, call this function with nIndex set to 49 (the 50th frame in a zero-based index) and nCount set to 50.
If pElement is NULL, you can retrieve a bitmap list of all images within the Data Set. To do this you must call LDicomDS::GetCountImage with pElement set to NULL to determine the number of images in the Data Set and set the nCount parameter in LDicomDS::GetImageList to this value.
If DICOM_GETIMAGE_ALLOW_RANGE_EXPANSION is set in uFlags, consider the following example:
If the dataset has the following attributes:
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Bits allocated |
16 |
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Bits stored |
12 |
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Pixel Range |
0 - +4095 |
Pixel Representation is unsigned (0)
Photometric Interpretation is MONOCHROME2
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Rescale Slope |
1 |
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Rescale Intercept |
-1024 |
After applying the rescale slope and the intercept:
Output minimum pixel value = (0 * 1 +(-1024)) = -1024
Output maximum pixel value = (4095 * 1 + (-1024)) = 3071
The new pixel value range (–1024 to 3071) can’t be represented with the current bits stored (12 bits), which can represent values in the range (–2048 to 2048). In this case the function will change the high bit inside the bitmap handle to be 12 instead of 11 (bits stored becomes 13), which can represent values in the range (–8192 to 8191).
Please note that the function won’t be able to update the high bit and/or low bit if the number of bits stored was already equal to the number of bits allocated.
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 |
See Also
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Functions: |
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Topics: |
Example
/* This example fills a bitmap list with all images from the Data Set */
L_VOID Test()
{
LDicomDS *pDS;
HBITMAPLIST hList;
pDS = new LDicomDS(NULL);
pDS->LoadDS("c:\\ltwin13\\images\\image1.dic", 0);
L_CreateBitmapList(&hList);
pDS->GetImageList(NULL, hList, 0, ELEMENT_INDEX_MAX, 0, ORDER_BGR, 0);
L_DestroyBitmapList(hList);
delete pDS;
}