Visual comparison for scene "checker"

The images are ranked by the pixel error in luminance as in the paper. A 24-bit display is better for viewing the following images.
"Correct" image.
No error
Hammersley points with p1 = 2.
Mean(|E|)=0.0086, S.D.(|E|)=0.0247
R.M.S.(E)=0.0261, Max.(|E|)=0.3451
multi-jittered sampling, n=4, N=16.
Mean(|E|)=0.0091, S.D.(|E|)=0.0261
R.M.S.(E)=0.0277, Max.(|E|)=0.3843
Hammersley points with p1 = 3.
Mean(|E|)=0.0097, S.D.(|E|)=0.0265
R.M.S.(E)=0.0282, Max.(|E|)=0.3961
Halton points with p1 = 2, p2 = 7.
Mean(|E|)=0.0105, S.D.(|E|)=0.0280
R.M.S.(E)=0.0299, Max.(|E|)=0.3451
Halton points with p1 = 2, p2 = 3.
Mean(|E|)=0.0110, S.D.(|E|)=0.0291
R.M.S.(E)=0.0312, Max.(|E|)=0.3686
jittered sampling, 4x4.
Mean(|E|)=0.0128, S.D.(|E|)=0.0335
R.M.S.(E)=0.0358, Max.(|E|)=0.3804
Poisson disk, d = 0.2.
Mean(|E|)=0.0132, S.D.(|E|)=0.0338
R.M.S.(E)=0.0363, Max.(|E|)=0.3804
random sampling.
Mean(|E|)=0.0179, S.D.(|E|)=0.0443
R.M.S.(E)=0.0478, Max.(|E|)=0.3961
regular sampling.
Mean(|E|)=0.0188, S.D.(|E|)=0.0491
R.M.S.(E)=0.0526, Max.(|E|)=0.5098