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Table 1 Alternative sampling of the scale space.

From: A scale-based forward-and-backward diffusion process for adaptive image enhancement and denoising

Sample method

σ 1

Logarithmic

{0.5, 1, 2, 4, 8, 16}

Linear

{0.5, 1, 1.5, 2, 2.5, 3}

Limited-Log

{0.5, 1, 2}

Linear-Log

{0.5, 1, 2, 3, 4, 5}