
Denoising 125
FIGURE 5.10: Details of Figure 5.9. Columns from left to right: Original
image, denoised by FoE denoising, denoised by NL-Means, denoised by AWL
with mean average, denoised by AWL with weighted average, denoised by
AWL with median average. Figure from [93].
actual optimal bound may be larger). A very similar view, that denoising al-
gorithms have little room for improvement, has been put forth by Chaterjee
and Milanfar in a work suggestively titled “Is denoising dead?” [118].
5.6 Denoising an image by denoising its curvature image
In this final section we present a novel framework for denoising, by
Bertalm´ıo and Levine [100], where we