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Peter S. Ungar
Paleoanthropology Laboratory and
Neogene Paleoecology Working Group

Department of Anthropology
University of Arkansas
Fayetteville, AR 72701

Research supported by
National Science Foundation
grant #BCS-0315157

Texture Analysis

Area-Scale Fractal Complexity

• Asfc is a measure of complexity derived from a series of relative area (relA) measures at different scales. [Animation of area-scale tiling]

• Asfc is the slope of a line fit to the steepest part of a curve of relA versus log(Scale) multiplied by -1000. [Animation of Asfc calculation]

• The steepest part of this curve is generally calculated for a range of 1, 2 or 3 orders of magnitude.

• Asfc is related to the fractal dimension (D) of the surface.

• Asfc is an ASME standard.

• High values for Asfc signal greater complexity as relA changes more over the scales of interest.

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CREDITS: Design by InterraMedia | Gorilla Photographs: Peter S. Ungar | © Neogene Paleoecology Working Group