  The similarity in fractal dimensions of paint ``blobs'' in samples of
gestural expressionist art implies that these pigment structures are
statistically indistinguishable from one another. This result suggests that
such dimensions cannot be used as a ``fingerprint'' for identifying the work of
a single artist. To overcome this limitation, the multifractal spectrum is
adopted as an alternative tool for artwork analysis. For the pigment blobs, it
is demonstrated that this spectrum can be used to isolate a construction
paradigm or art style. Additionally, the fractal dimensions of edge structures
created by luminance gradients on the canvas are analyzed, yielding a potential
method for visual discrimination of fractally-similar paintings.
