[Bf-committers] Dithering

[Alexander Ewering]

On Wed, 27 Oct 2004, Roland Hess wrote:

>> 
>> This looks *very* promising, though I'm a bit worried about animation
>> "flickering" if it uses random noise.
>> 
>> Ton, you should have a look at this :)
>> 
>> | alexander ewering              instinctive mediaworks
>> | ae[@]instinctive[.]de   http://www[.]instinctive[.]de
>
> In my experience in image manipulation and commercial printing, a noise 
> variance of only1% in the luminosity of an image is enough to remove visual 
> banding. At that level the noise is almost unnoticable to the naked eye. I 
> would be very surprised if it caused flickering in an animation. If anything, 
> it would give it a slightly more organic feel. The only problem I would 
> foresee is that it would screw with frame differential compression methods.

Only if it is purely random. Floyd-Steinberg dithering uses a 'fixed'
kind of 'noise' (it's not even noise), so it should also work well with
those compression methods.

| alexander ewering              instinctive mediaworks
| ae[@]instinctive[.]de   http://www[.]instinctive[.]de