LBitmap::EdgeDetectStatistical

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#include "ltwrappr.h"

virtual L_INT LBitmap::EdgeDetectStatistical (uDim, uThreshold, crEdgeColor, crBkColor, uFlags = 0)

L_UINT uDim;	/* dimensions of the edge detector neighborhood */
L_UINT uThreshold;	/* threshold value */
COLORREF crEdgeColor;	/* color value */
COLORREF crBkColor;	/* color value */
L_UINT32 uFlags;	/* flags */

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.
uFlags	Reserved for future use. Must be 0.

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.

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.

Platforms

Win32, x64.

See Also

Functions:	LBitmap::BricksTexture, LBitmap::Deskew, LBitmap::DiffuseGlow, LBitmap::GlowFilter, LBitmap::HalfTonePattern, LBitmap::HighPassFilter, LBitmap::MaskConvolution, LBitmap::Perspective, LBitmap::PlasmaFilter, LBitmap::Pointillist, LBitmapBase::Combine, LBitmap::IntensityDetect, LBitmap::Sharpen, LBitmap::SpatialFilter, LBitmap::EdgeDetector, LBitmap::EdgeDetectStatistical2
Topics:	Detecting and Enhancing Edges and Lines
	Raster Image Functions: Filtering Images
	Using Color Values in LEADTOOLS
	Raster Image Functions: Detecting and Enhancing Edges and Lines

Example

L_INT LBitmap__EdgeDetectStatisticalExample(LAnimationWindow *BitmapWindow) 
{
   return BitmapWindow->EdgeDetectStatistical (15, 128, RGB(255, 255, 255), RGB(0, 0, 0)); 
}