References ▼
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.
| Member | Description | |
| uStructSize | Size of this structure, in bytes. Use the sizeof operator to calculate this value. | |
| pBitmap | Ignored. | |
| bZoomToFit | 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)". | |
| nThreshold | 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 | ||
| uFilter | 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 | ||
| uDlgFlags | 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. | |
| pfnHelpCallback | Ignored. | |
| pHelpCallBackUserData | Ignored. | |