LBitmap::EdgeDetectEffect (original) (raw)
Summary
Performs edge detection on the image.
Syntax
#include "ltwrappr.h"
virtual L_INT LBitmap::EdgeDetectEffect(uLevel, uThreshold, uFlags)
Parameters
L_UINT uLevel
Level value used to determine the brightness of the edges. Standard value is 50. Range between 1 and 100. Big values will produce bright edges.
L_UINT uThreshold
Threshold value used to determine which pixels are going to be filtered. If the difference determined for a pixel is less than this value, the pixel is set to 0. If the difference is greater, the filter will be applied to the pixel. The valid 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.
L_UINT uFlags
Flag that indicates the type of edge to generate. Possible values are:
| Value | Meaning |
|---|---|
| EDGE_SOFT | [0] Generate softer (smoother) edges. |
| EDGE_SOLID | [1] Generate rougher edges. |
Returns
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
Comments
This function detects the edges in a bitmap and then replaces the values of edges by new values calculated according to the uFlags.
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.
To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.
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.
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 Effect Function - Before
Edge Detect Effect Function - After
View additional platform support for this Edge Detect Effect 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
- LBitmap::EdgeDetector
- LBitmap::SpatialFilter
- LBitmap::EdgeDetectStatistical
- LBitmap::DirectionEdgeStatistical
- LBitmap::EdgeDetector2
- LBitmap::EdgeDetectStatistical2
- LBitmap::DirectionEdgeStatistical2
Topics
- Raster Image Functions: Filtering Images
- Detecting and Enhancing Edges and Lines
- Raster Image Functions: Detecting and Enhancing Edges and Lines
Example
L_INT LBitmap__EdgeDetectEffectExample(LBitmap *pLeadBitmap)
{
/* Apply find edges effect on the image*/
return pLeadBitmap->EdgeDetectEffect(50, 0, EDGE_SOFT);
}
LEADTOOLS Raster Imaging C++ Class Library Help