LBitmap::AddNoise
#include "ltwrappr.h"
virtual L_INT LBitmap::AddNoise(uRange=500, uChannel=CHANNEL_MASTER)
L_UINT uRange; |
/* percentage of coverage */ |
L_UINT uChannel; |
/* color plane constant */ |
Adds random pixels to a bitmap, letting you specify the percentage of coverage and the color plane.
Parameter |
Description |
|
uRange |
Percentage of coverage, expressed in tenths of a percent. Valid values are 0 to 1000. |
|
uChannel |
Color plane constant. This plane will be affected by the noise. Possible values are: |
|
|
Value |
Meaning |
|
CHANNEL_MASTER |
[0] All channels. |
|
CHANNEL_RED |
[1] Red channel only. |
|
CHANNEL_GREEN |
[2] Green channel only. |
|
CHANNEL_BLUE |
[3] Blue channel only. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
Use this function in order to add random noise to a bitmap.
Use the LBitmap::Perlin function to use a pseudo-random number generator in order to create a Perlin noise, and then procedurally transform that noise into a texture. Depending on the flags that are set, the texture can be saved as a bitmap by itself, or the texture can be combined with another bitmap. For more information, refer to Using the LBitmap::Perlin Function.
Use the LBitmap::Clouds function in order to use Perlin equations to generate pseudo-random noise, and then procedurally transform that noise into a cloud-like texture. The LBitmap::Clouds function applies equations to the Perlin noise that are different than those used by the LBitmap::Perlin function.
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.
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
LTDIS 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__AddNoiseExample() { L_INT nRet; LBitmap m_Bitmap; nRet =m_Bitmap.Load(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\Image1.cmp"), 0,ORDER_BGR); if(nRet !=SUCCESS) return nRet; nRet =m_Bitmap.AddNoise(); if(nRet !=SUCCESS) return nRet; return SUCCESS; }