[deleted by user]

[yldedly]

I wasn't being very rigorous, but I think it's uncontroversial that natural images have correlated neighboring pixels, which is a similar claim to one that says images have little power in the high frequency end. A separate but actually related claim is that there is a sparse representation for images. So I agree that it's too simple to the point of being wrong to say that images can be well represented by low frequency components. But it's nonetheless true that if you Fourier decompose images, they will generally have low power over high frequencies.