Before revision: In this paper we introduce a biologically inspired CNN architecture that has a first convolutional layer  that mimics the role of the LGN . The first layer of the net shows a rotationally symmetric pattern justified by the structure of the net itself that turns up to be an approximation of a Laplacian of Gaussian  .
After revision: In this paper we introduce a biologically inspired CNN architecture that has a first convolutional layer composed by a single filter that mimics the role of the LGN . The first layer of the net shows a rotationally symmetric pattern justified by the structure of the net itself that turns up to be an approximation of a Laplacian of Gaussian .