The human brain can achieve a remarkable ability to recognize visual patterns in an Invariant, selective and fast manner. The human visual system is quite powerful. It has an exquisite selectivity that allows us to distinguish among very similar objects. In addition, iy also allows Robustness (Invariance) to transformations.
In the model (Ventral stream pathway and architecture proposed by Poggio's group) shown in the image below, why the model is selective in S layers and invariant in C layers ? I didn't understand well why the S layer achieves selectivity and C layer achieves invariance. Please can someone explain to me in details why the model is selective in S and Invariance in C layers?
And who know the HMAX model, the model is called "Hierarchical Model and X". why X? what was meant by "X" ?
This figure is from Serre et al.'s A quantitative theory of immediate visual recognition. Prog Brain Res. 2007.
Any help will be very very appreciated.