134 Prakt. Met. Sonderband 38 (2006) 
alleviates the task of finding corresponding surface profiles with the additional benefit that 
it corrects for rotations in the surface models. From the generated transformations, local 
toughness parameters, such as the COD; value, difference height maps, and volume 
parameters can be easily determined. An important future extension is to adapt the 
algorithm to surfaces that exhibit plastic deformations in the whole field of view. 
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