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> David Marr... defined a general framework for studying complex biological systems.. in.. _Vision_... a complex biological system can be understood at three.. levels. The first level ("ComputationalLevel") describes the input and output to the system, which define the task.. The second level ("#AlgorithmicLevel") describes the procedure by which an input is converted.. image on our retina can be processed to achieve the task.. .. third level ("ImplementationLevel") describes how our own biological hardware.. implements the procedure..
#DavidMarr
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