Fig. 3

The original Lena image (a) and reconstructed versions with sensing ratios (\(\eta _1\)) of 35% for the sensings, (b) \( \varPhi _\text{m}+M_\text{c}\); (c) \( \varPhi _\text{m}+M_\text{d}\); (d) \( \varPhi _\text{m}+M_n\); (e) \( \varPhi _\text {r}\); (f) \( \varPhi _\text{m}+M_\text {c}^\text {p}\); (g) \( \varPhi _\text{m}+M_\text {d}^\text {p}\); (h) \( \varPhi _\text{m}+M_n^\text {p}\)