LBitmap::AddNoise

#include "ltwrappr.h"

virtual L_INT LBitmap::AddNoise(uRange=500, uChannel=CHANNEL_MASTER)

Adds random pixels to a bitmap, letting you specify the percentage of coverage and the color plane.

Returns

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

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;
}