LEADTOOLS Common Dialog C++ Class Library Help
| LEADTOOLS Common Dialog C++ Class Library Help > Quick Reference > Data Types > EDGEDETECTORDLGPARAMS |
typedef struct _EDGEDETECTORDLGPARAMS
{
L_UINT uStructSize;
pBITMAPHANDLE pBitmap;
L_BOOL bZoomToFit;
L_INT nThreshold;
L_UINT uFilter;
L_UINT32 uDlgFlags;
pfnHelpCallback;
L_VOID *pHelpCallBackUserData;
} EDGEDETECTORDLGPARAMS, * LPEDGEDETECTORDLGPARAMS;
The EDGEDETECTORDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogImageEffect::DoModalEdgeDetector function. After the user closes the dialog box, this structure is updated with information about the user's selections.
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Member |
Description |
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uStructSize |
Size of this structure, in bytes. Use the sizeof operator to calculate this value. |
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pBitmap |
Ignored. |
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bZoomToFit |
Flag that indicates the initial zoom level for previewing the image. Possible values are: |
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Value |
Meaning |
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TRUE |
Set the initial zoom level to "Zoom to fit". |
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FALSE |
Set the initial zoom level to "Normal (1:1)". |
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nThreshold |
Threshold value used to determine which pixels are edge pixels. Possible image values are: |
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If the image is |
Unsigned |
Signed |
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12-bit |
0 to 4095 |
-2048 to +2047 |
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16-bit gray, 48-bit, or 64-bit |
0 to 65535 |
-32768 to +32767 |
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Otherwise |
0 to 255 |
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uFilter |
Flag that indicates which edge detection filter to apply. Possible values are: |
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Value |
Meaning |
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EDG_SOBEL_VERT |
[0x0101] Detect the vertical edges |
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EDG_SOBEL_HORZ |
[0x0102] Detect the horizontal edges |
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EDG_SOBEL_ALL |
[0x0103] Detect horizontal & vertical edges |
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EDG_PREWITT_VERT |
[0x0201] Detect the vertical edges |
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EDG_PREWITT_HORZ |
[0x0202] Detect the horizontal edges |
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EDG_PREWITT_ALL |
[0x0203] Detect horizontal & vertical edges |
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EDG_LAPLACE_1 |
[0x0301] Detect vertical & horizontal edges |
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EDG_LAPLACE_2 |
[0x0302] Detect general edges |
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EDG_LAPLACE_3 |
[0x0303] Detect general edges. (The filter used for this option is different than the filter used for the EDG_LAPLACE_2 filter.) |
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EDG_LAPLACE_DIAG |
[0x0304] Detect the diagonal edges |
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EDG_LAPLACE_HORZ |
[0x0305] Detect the horizontal edges |
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EDG_LAPLACE_VERT |
[0x0306] Detect the vertical edges |
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EDG_GRADIENT_N |
[0x0401] Detect north edges |
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EDG_GRADIENT_NE |
[0x0402] Detect north east edges |
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EDG_GRADIENT_E |
[0x0403] Detect east edges |
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EDG_GRADIENT_SE |
[0x0404] Detect south east edges |
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EDG_GRADIENT_S |
[0x0405] Detect south edges |
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EDG_GRADIENT_SW |
[0x0406] Detect south west edges |
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EDG_GRADIENT_W |
[0x0407] Detect west edges |
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EDG_GRADIENT_NW |
[0x0408] Detect north west edges |
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uDlgFlags |
User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are: |
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Value |
Meaning |
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DLG_EDGEDETECTOR_SHOW_CONTEXTHELP |
[0x00000002] dialog should contain a context sensitive help icon. |
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pfnHelpCallback |
Ignored. |
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pHelpCallBackUserData |
Ignored. |
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