Sets the convolution to use a custom filter.
HRESULT retVal = object.SetCustomFilter(pFilter, Size);
Pointer to an array of custom filter values.
Size of the custom filter, in pixels.
The height and width of the custom filter must be greater than or equal to 1. Most filters define a center pixel that is scanned over the input image to produce the output image. For even-sized dimensions, the center pixel for that dimension is the length divided by two. For example, a 5 x 4 custom filter has a center pixel at (2,2).