Second-Order Regression-Based MR Image Upsampling

Figure 3

Upsampling results (1 × 1 × 1 mm³) for simulated data with 3 × 3 × 3 mm³ on BrainWeb.

(a) Original data

(b) LR data

(c) NN

(d) GPR

(e) NLM

(f) The proposed method