Re: (image attached)how to segment the image like this?

> Note to Walala:
>
> Lena, who is not really a blockhead (she is still very attractive in
> advancing age), looks better interpolated. I divided each square into
> four smaller ones, and made a new image in which each new square is the
> weighted average of those around it. I used this set of weights:
>
> 1 2 1
> 2 4 2
> 1 2 1
>
> Divide the sum by 16, of course. Other weightings may be better: I
> pulled these out of a hat.
>

Cool, how did you get it? You are exactly right! That image is a residual
error image or difference image after I process Lena blindly(or
magically)... Now I understand it has a good correlation with "weighted
average"... interesting! thanks a lot!

-Walala