The LEADTOOLS C++ Class Library is a wrapper to the LEADTOOLS C API and provides only a subset of the features and functionality otherwise available in the LEADTOOLS C API. For more information about the full feature set of the LEADTOOLS C API, refer to LEADTOOLS C API Introduction.
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typedef struct _EDGEDETECTORDLGPARAMS
{
L_UINT uStructSize;
pBITMAPHANDLE pBitmap;
L_BOOL bZoomToFit;
L_INT nThreshold;
L_UINT uFilter;
L_UINT32 uDlgFlags;
LTCOMMDLGHELPCB 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.
Size of this structure, in bytes. Use the sizeof operator to calculate this value.
Ignored.
Flag that indicates the initial zoom level for previewing the image. Possible values are:
Value | Meaning |
---|---|
TRUE | Set the initial zoom level to "Zoom to fit". |
FALSE | Set the initial zoom level to "Normal (1:1)". |
Threshold value used to determine which pixels are edge pixels. Possible image values are:
If the image is | Unsigned | Signed |
---|---|---|
12-bit | 0 to 4095 | -2048 to +2047 |
16-bit gray, 48-bit, or 64-bit | 0 to 65535 | -32768 to +32767 |
Otherwise | 0 to 255 |
Flag that indicates which edge detection filter to apply. Possible values are:
Value | Meaning |
---|---|
EDG_SOBEL_VERT | [0x0101] Detect the vertical edges |
EDG_SOBEL_HORZ | [0x0102] Detect the horizontal edges |
EDG_SOBEL_ALL | [0x0103] Detect horizontal & vertical edges |
EDG_PREWITT_VERT | [0x0201] Detect the vertical edges |
EDG_PREWITT_HORZ | [0x0202] Detect the horizontal edges |
EDG_PREWITT_ALL | [0x0203] Detect horizontal & vertical edges |
EDG_LAPLACE_1 | [0x0301] Detect vertical & horizontal edges |
EDG_LAPLACE_2 | [0x0302] Detect general edges |
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.) |
EDG_LAPLACE_DIAG | [0x0304] Detect the diagonal edges |
EDG_LAPLACE_HORZ | [0x0305] Detect the horizontal edges |
EDG_LAPLACE_VERT | [0x0306] Detect the vertical edges |
EDG_GRADIENT_N | [0x0401] Detect north edges |
EDG_GRADIENT_NE | [0x0402] Detect north east edges |
EDG_GRADIENT_E | [0x0403] Detect east edges |
EDG_GRADIENT_SE | [0x0404] Detect south east edges |
EDG_GRADIENT_S | [0x0405] Detect south edges |
EDG_GRADIENT_SW | [0x0406] Detect south west edges |
EDG_GRADIENT_W | [0x0407] Detect west edges |
EDG_GRADIENT_NW | [0x0408] Detect north west edges |
User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:
Value | Meaning |
---|---|
DLG_EDGEDETECTOR_SHOW_CONTEXTHELP | [0x00000002] dialog should contain a context sensitive help icon. |
Ignored.
Ignored.