LBitmap::ChangeSaturation

#include "ltwrappr.h"

virtual L_INT LBitmap::ChangeSaturation(nChange)

Increases or decreases the saturation of colors in the class object's bitmap.

Returns

Comments

Negative values decrease the saturation of colors. Positive values increase the saturation. The saturation level is increased or decreased by a percentage of its present saturation level. For example, an increase of 20% of the current saturation level "L" will raise the new saturation level "L1" to a value L + 0.20 * L. Likewise, increasing the saturation level 100% doubles the saturation level ( L1 = L + 1.0 * L). Decreasing the saturation level 100% will set the new saturation level to 0. This process is carried out for every 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 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

//ChangeSaturation

L_INT LBitmap__ChangeSaturationExample()
{
   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;
   // Increase the Saturation
   nRet =m_Bitmap.ChangeSaturation(20);
   if(nRet !=SUCCESS)
      return nRet;
   return SUCCESS;
}