Median method (ILEADRasterProcess)

Visual Basic example

Visual C++ 5.0 example

Delphi 4 example

C++ Builder example

 

Syntax

short Median (ILEADRaster *pRaster, short iDim);

Overview

Refer to Removing Noise.

Remarks

Changes the color of each pixel in the bitmap to the median color of pixels in its neighborhood. This is similar to the Average method, but it is used for noise reduction, rather than a blur effect.

This method supports 12 and 16-bit grayscale images and 48 and 64-bit color images. Support for 12 and 16-bit grayscale images and 48 and 64-bit color images is available only in the Document/Medical toolkits.

You control the effect by specifying the size of the neighborhood that is used for calculating the median value. For 8x8, pass 8 in the iDim parameter.

This method 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 method.

See Also

Topics:

Raster Images: Filtering Images

 

Raster Images: Where the Region Preempts the Bitmap