Limitations of "butterfly" filter masks
 

    The band profiles and hence the shape of the "butterfly" peaks depend on

    • the position of the particular band in the Kikuchi pattern,
    • the type of pattern,
    • the diffraction geometry,
    • the accelerating voltage,
    • the crystal lattice and the particular hkl.

    One mask is not sufficient, several masks are required to analyze one pattern.

    Determination of band positions and band widths is less accurate when using (inadequate) mask(s)

    The wider the bands are, the larger the masks should be. Large masks, however, unduly increase computation time.

    =>   Cross-correlation with a filter mask tends to be ineffectual.  

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