Retinal DOG Filters: High-pass or High-frequency Enhancing Filters?

This paper analyzes the filtering operation carried out by the classical Difference-of-Gaussians model proposed by Rodieck to describe the receptive fields of retinal ganglion cells. Discrete DoG kernels of such functions were developed and compared with High-Pass and High-Frequency Enhancing filters. The results suggest that the DoG Kernels behave as High-Frequency Enhancing filters but in a limited band of frequencies.