LBitmap::EdgeDetectStatistical
#include "ltwrappr.h"
virtual L_INT LBitmap::EdgeDetectStatistical (uDim, uThreshold, crEdgeColor, crBkColor)
L_UINT uDim; |
/* dimensions of the edge detector neighborhood */ |
L_UINT uThreshold; |
/* threshold value */ |
COLORREF crEdgeColor; |
/* color value */ |
COLORREF crBkColor; |
/* color value */ |
Detects edges by examining the variation of colors in all directions using statistical indices.
Parameter |
Description |
uDim |
Dimensions of the neighborhood used to detect edges (uDim x uDim), in pixels. |
uThreshold |
Threshold value used to determine which pixels are edge pixels. If the difference determined by the edge detector algorithm for a pixel is greater than this value, the pixel is an edge pixel. The valid range is from 0 - 65535 for 64-bit, 48-bit and 16-bit grayscale images and from 0 - 4095 for 12-bit grayscale images. Otherwise, it is from 0 to 255. |
crEdgeColor |
The COLORREF value that specifies the edge color. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color. |
crBkColor |
The COLORREF value that specifies the non edge color. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
The edges are detected by applying a statistical filter that analyzes the variations of colors in all directions around each pixel.
To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.
This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.
Required DLLs and Libraries
LTIMG 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
Example
void TestFunction(LAnimationWindow *BitmapWindow)
{
BitmapWindow->EdgeDetectStatistical (15, 128, RGB(255, 255, 255), RGB(0, 0, 0));
}