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.

keywords: Retina, Difference of Gaussians, High-pass Filtering, High-Frequency Enhancing Filtering