If the bands of posterisation were in fact some subtle detail in the picture that you wanted,( Say wallpaper) this wouldn't just disappear in the conversion. I have seem the effect of burning in skies at 8 bit enough times to know that the gradations ARE more subtle if done in 16 bit.
It's just obvious, think about doing it in 1 bit (or whatever black and white only would be) - the pic is say a a square, half white half black..... converting to 16 then to 8 is not going to bring a whole new range of subtle gradations into the image.
David Purdie
to see a portfolio go to - http://www.davidpurdie.com
On 21 May 2004, at 17:14, Otto PETER wrote:
results. Most likely you could have done your manipulations, seen the
posterization, converted to 16-bit, then done a second conversion back to 8 bit
and the posterization would have disappeared. This doesn't prove that taking an
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