[worldKit-dev] Smoothing (Anti-aliasing) of intermediate zooms when using Zoomify

[Brent Pedersen]

just a wild guess here, but given:
> if the original is 1024px times 1024px the scaled down version 512x512 and 256x256
> are smooth (these are produced by Zoomify), but 378x378 and 768x768 are jagged

and then look at this line:
http://worldkit.org/trac/browser/worldkit/com/brainoff/worldkitImages.as#L451
could that 256 be the reason? i dont know anything about zoomify, so
that may be way off.

-brent



On Wed, Mar 26, 2008 at 7:10 PM, Mikel Maron <mikel_maron at yahoo.com> wrote:
>
> Hi Mark
>
> Thanks for bringing this up, it's an issue that's been raised before and
> needs looking into.
>
> http://worldkit.org/trac/ticket/153
>
> Really this needs someone to pick up and focus on what's going here.
> Obviously worldKit can do better,
> because Zoomify is handling things better.
>
> I myself won't have time in the foreseeable future. Though there is one good
> development -- next week
> Brent Pederson and I are having a mini-hackfest on worldKit, in order to get
> mtasc compilation fully working.
> After that, hopefully, development of worldKit will be completely open
> source.
>
> -Mikel
>
> ----- Original Message ----
> From: Mark <markgavor at yahoo.com>
> To: worldkit-dev at lists.brainoff.com
> Sent: Wednesday, March 26, 2008 3:52:29 AM
> Subject: [worldKit-dev] Smoothing (Anti-aliasing) of intermediate zooms when
> using Zoomify
>
>    Hello everyone,
>
>   this is Mark writing. I am new to WorldKit, and I
> have a question regarding the integration with
> Zoomify.
>
>   Here is the problem I have: Some of the zoomed in
> images are with smooth appearance, and some are
> jagged. It depends on the relation of the size of the
> original picture and the size of the scaled down
> picture - if the width of the scaled down picture is
> exactly the width of the original divided by a power
> of 2 - the appearance is smooth. If it is a different
> size - it is jagged. Example: if the original is
> 1024px times 1024px the scaled down version 512x512
> and 256x256 are smooth (these are produced by
> Zoomify), but 378x378 and 768x768 are jagged (because
> it is an approximation?).
>
> At the same time - the ZoomifyView smooths out even
> the  378x378 and 768x768 versions - there are 3 levels
> of pictures but 5 levels of zoom.
>
> On a related note - the <zoomc> tag seems to be
> inactive when <zoomifydir> is used.
>
> Any suggestions on getting a smoother appearance using
> the very good WorldKit product?
>
> Best regards, Mark
>
>
>
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