| Re: blurring and deblurring for effect [message #42823 is a reply to message #42822] |
Wed, 23 February 2005 04:59   |
helaha
Messages: 26
Registered: March 2004
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Junior Member |
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Daer Bob,
I have written an IDL application (IQM) for interactive image
processing and the IDL's Median, Smooth and Lee Filtering is
implemented without edge effects.
More info and a tutorial of the application can be found at:
http://www.uni-graz.at/people/ahammer/IQM/index.htm
If you send me an e-mail, I can give you the download password.
Best wishes,
Helmut Ahammer
helmut.ahammer@meduni-graz.at
> 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
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