Comment by COGlory
3 years ago
A gaussian blur is not a good test. It does not technically remove all the information from the image. As such this test can't distinguish between unblur or actual moon-pasting.
Binning the image, or cropping it in Fourier space, would be a better test.
They also downscaled it to 170x170 (Which is basically binning) and clipped the highlights at 216 (Which is basically Fourier space cropping)