LBitmap::EdgeDetectStatistical
Summary
Detects edges by examining the variation of colors in all directions using statistical indices.
Syntax
#include "ltwrappr.h"
virtual L_INT LBitmap::EdgeDetectStatistical (uDim, uThreshold, crEdgeColor, crBkColor, uFlags = 0)
Parameters
L_UINT uDim
Dimensions of the neighborhood used to detect edges (uDim x uDim), in pixels.
L_UINT 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 values ranges are:
- 0 to 65535 for 64-bit, 48-bit and 16-bit grayscale images.
- 0 to 4095 for 12-bit grayscale images.
- 0 to 255 otherwise.
COLORREF 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.
COLORREF 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.
L_UINT32 uFlags
Reserved for future use. Must be 0.
Returns
| Value | Meaning |
|---|---|
| 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.
Edge Detect Statistical Function - Before
Edge Detect Statistical Function - After
View additional platform support for this Edge Detect Statistical 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));}
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