A Bidirectional Flow Joint Sobolev Gradient for Image Interpolation

Figure 3

Old man image reduced and expanded by 3×3. Top row: original, LR image, LSS. Bottom row: FBF (𝑘=500, 𝛼=0.01, 𝛽=0.05, 𝑙₁=5×10⁻⁵, 𝑙₂=2×10⁻⁵); BG (𝜆=0.5, 𝐾=0.2); proposed (𝑘=70,𝜆=25,𝛼=5,𝛽=3).

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