I'm pretty sure that's because you are constantly trained on that type of image in your day to day life. "Radial masking in the Fourier domain" is pretty much i

I'm pretty sure that's because you are constantly trained on that type of image in your day to day life. "Radial masking in the Fourier domain" is pretty much identical to an image that it is out of focus or seen with a low resolution part of your eye. (Most of your vision.)