Measurement for halftoning

Do not know how they display the radially averaged power spectrum as the paper.

grayness = 0.75 copy the image from the paper and calculate it again.

grayness = 192
MSSIM to measure the structure simliarity

For(1-*) group
For(2-*)group
For(3-*)group

PSNR measurement for tone similariy

For(1-*) group
For(2-*) group
For(3-*) group
(01-cat)
(02-cat)
(03-cat)
(01-tree)
(02-tree)
(03-tree)
(01-a1)
(02-a1)
(03-a1)