LBitmap::EdgeDetectStatistical2
#include "ltwrappr.h"
L_INT LBitmap::EdgeDetectStatistical2(uDim, nThreshold, crEdgeColor, crBkColor)
L_UINT uDim; |
/* dimensions of the edge detector neighborhood */ |
L_INT nThreshold; |
/* 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. |
nThreshold |
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 threshold range for 16, 48 and 64-bit images is from 0 to 65535 for unsigned images, and from -32768 to +32767 for signed images. For 12-bit images, the threshold range is from 0 to 4095 for unsigned images, and from -2048 to +2047 for signed 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 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.
This function supports signed data images.
Required DLLs and Libraries
LTIMGEFX 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
L_INT LBitmap__EdgeDetectStatistical2Example(LAnimationWindow *BitmapWindow) { return BitmapWindow->EdgeDetectStatistical2(15, 128, RGB(255, 255, 255), RGB(0, 0, 0)); }