Re: Accurate edge detection?

On Jul 30, 9:35=A0am, Andrew_M <m...@[EMAIL PROTECTED]
> wrote:
>
> Due to the fact that Mr. Spencer didn't explained in details what sort
> of objects he is working with, I have a guess that =ABedge knife=BB is
th=
e
> term what's only purpose is to make further discussion simpler.
> Probably he wants to get better resolution than his optics plus
> scanner allow to get.

Perhaps, but that is up to him to say. He did not say he wanted to
achieve higher resolution. Rather, he asked a specific question about
optics. The knife edge is of course grossly oversimplified. The point
of the example was to illustrate some pertiment points, that is all.
This is the function of a 'toy model'. However, in some cir***stances
(low edge curvature, particular type of edges) it might also be
useful.

> things, as you may notice, trying to compare two images:
> plight://www.smartfills.com/Html/Images/diffr1.jpg(the first
> iteration) and =A0http://www.smartfills.com/Html/Images/diffr3.jpg(the
> eight iteration). After this iteration the source could be restored
> using simple threshold. In any event,.contours was restored more than
> accurately after the first iteration.

Yes, very good, but I am not here to judge your efforts at image
restoration. Perhaps you have not seen recent research on this topic.

> Therefore, for two colors images
> this method solve the problem completely.

I took a look at your images. I would certainly not say the problem
was solved completely.

illywhacker;