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Re: blurring and deblurring for effect [message #42840 is a reply to message #42823]

Tue, 22 February 2005 14:26

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Rob writes:

> I have been messing around a bit with blurring an image to be used for
> an intro for a talk. What I want to do is display a series of color
> images over time that begin with a very blurry version first and end
> with the sharp version. My knowledge of image processing is limited so
> I'm hoping that you experts can help me out a bit. The original sharp
> image is a PNG file. I use TV to display the image in a window that is
> the same size as the image. I've tried the MEDIAN filter where the
> width decreases with each image in the sequence but I'm not happy with
> the band of unblurred image that extends around the perimeter of the
> image. EDGE_TRUNCATE takes care of that in SMOOTH but the effect is
> still not great. There seems to be a "mixing" of colors when I use
> SMOOTH that isn't present when I use MEDIAN which is also annoying.
> I'm looking for a very smooth and relatively seamless transition.
>
> If it helps the code below shows what I've been doing. Any suggestions
> would be appreciated.

Well, I thought it looked pretty good with the PNG file I
choose, but if you want to do the MEDIAN thing, I think
the professional image expert embeds their image in a
larger image so that edge effects are ameliorated. Then,
when they are finished, extracts the processed image from
the larger image etc. (I know, but if it doesn't involve
iTools, you and me, babe, are the only ones interested.)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: blurring and deblurring for effect By: Rob[1] on Wed, 23 February 2005 18:01
		Re: blurring and deblurring for effect By: K. Bowman on Wed, 23 February 2005 06:41
		Re: blurring and deblurring for effect By: K. Bowman on Wed, 23 February 2005 13:09
		Re: blurring and deblurring for effect By: Rob Dimeo on Wed, 23 February 2005 06:01
		Re: blurring and deblurring for effect By: helaha on Wed, 23 February 2005 04:59
		Re: blurring and deblurring for effect By: David Fanning on Tue, 22 February 2005 14:26

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