Parameterless edge preserving colour image diffusion

The sensors of a typical digital camera are broad-band, i.e. they cover most of the visible spectrum. This means that the images from the RGB channels are highly correlated. Specifically, if a luminance edge appears in one channel then it is highly likely an edge in the other two. This paper presents a parameterless diffusion algorithm that explores the correlation between the colour channels to remove noise and compression artifacts.