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Urs Kleinholdermann, Karl R. Gegenfurtner, Volker H. Franz; A model on human grasp point selection. Journal of Vision 2009;9(8):1100. doi: 10.1167/9.8.1100.
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© ARVO (1962-2015); The Authors (2016-present)
We present a model of where humans place index finger and thumb when grasping arbitrary objects with a precision grip. The model incorporates three weighted rules to (a) maximize force-closure, (b) optimize the position of the object's gravicenter relative to the fingers, and (c) minimize deviations from ones natural grasp angle. We determined the parameters of the model in two experiments (N=18 and N=19) with objects of simple geometry. In a third experiment (N=18) we predicted the grasp points for a set of objects with complex geometries. The results show that our simple model can surprisingly well predict human grasp point selection.
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