Before revision:  For this, we simulate the activation of the retinal/cortical simple cells in responses to these patterns based on a Classical Receptive Field (CRF) model  to explain tilt effects in these illusions.
After revision:  For this, we simulate the activation of the retinal/cortical simple cells in responses to these patterns based on a Classical Receptive Field (CRF) model (referred to as Vis-CRF) to explain tilt effects in these illusions.