| Re: blurring and deblurring for effect [message #42795] |
Wed, 23 February 2005 18:01 |
![Rob[1] is currently offline](theme/default/images/xoffline.png.pagespeed.ic.XRkd1fkXye.png "Rob[1] is currently offline")
Rob[1]
Messages: 5
Registered: January 2005
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Junior Member |
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Thanks Ken. That's just what I wanted.
Rob
Kenneth Bowman wrote:
> This works pretty well for me.
>
> infile = '~/Pictures/dave_index.jpg'
> READ_JPEG, infile, image
> TV, image, TRUE = 1
> cr = ''
> READ, cr, PROMPT = 'Enter <cr> to continue ...'
> image = SMOOTH(image, [1, 20, 20], /EDGE)
> TV, image, TRUE = 1
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| Re: blurring and deblurring for effect [message #42797 is a reply to message #42795] |
Wed, 23 February 2005 06:41  |
K. Bowman
Messages: 330
Registered: May 2000
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Senior Member |
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In article <1109167314.650513.117960@o13g2000cwo.googlegroups.com>,
"Rob" <robert.dimeo@nist.gov> wrote:
> David,
>
> The problem is that the smoothed image shows some strange colors.
> Since the image that I'm using is "more or less" a blue-white color
> scheme, I ditched the image colors (converted my image to gray-scale),
> loaded in color table 1, then performed the smoothing operation. This
> resulted in the look that I wanted. Unfortunately I don't know how to
> accomplish this for the general case for an image with its *own* colors
> like my PNG image.
This works pretty well for me.
infile = '~/Pictures/dave_index.jpg'
READ_JPEG, infile, image
TV, image, TRUE = 1
cr = ''
READ, cr, PROMPT = 'Enter <cr> to continue ...'
image = SMOOTH(image, [1, 20, 20], /EDGE)
TV, image, TRUE = 1
The picture is from http://www.dfanning.com/images/dave_index.jpg.
After smoothing, Dave looks much like he did at the end of the last
Expert Programmers Association meeting.
Ken Bowman
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| Re: blurring and deblurring for effect [message #42798 is a reply to message #42797] |
Wed, 23 February 2005 13:09 |
K. Bowman
Messages: 330
Registered: May 2000
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Senior Member |
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In article <1109167314.650513.117960@o13g2000cwo.googlegroups.com>,
"Rob" <robert.dimeo@nist.gov> wrote:
> David,
>
> The problem is that the smoothed image shows some strange colors.
> Since the image that I'm using is "more or less" a blue-white color
> scheme, I ditched the image colors (converted my image to gray-scale),
> loaded in color table 1, then performed the smoothing operation. This
> resulted in the look that I wanted. Unfortunately I don't know how to
> accomplish this for the general case for an image with its *own* colors
> like my PNG image.
Apologies if this shows up twice.
This seems to work pretty well for me to blur a truecolor image:
infile = '~/Pictures/dave_index.jpg'
READ_JPEG, infile, image
TV, image, TRUE = 1
cr = ''
READ, cr, PROMPT = 'Enter <cr> to continue ...'
image = SMOOTH(image, [1, 20, 20], /EDGE)
TV, image, TRUE = 1
The sample image I used is
http://www.dfanning.com/images/dave_index.jpg
After blurring David looks much like he did at the end of the last IDL
Expert Programmers Associate meeting.
Ken Bowman
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| Re: blurring and deblurring for effect [message #42822 is a reply to message #42797] |
Wed, 23 February 2005 06:01 |
Rob Dimeo
Messages: 17
Registered: November 1999
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Junior Member |
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David,
The problem is that the smoothed image shows some strange colors.
Since the image that I'm using is "more or less" a blue-white color
scheme, I ditched the image colors (converted my image to gray-scale),
loaded in color table 1, then performed the smoothing operation. This
resulted in the look that I wanted. Unfortunately I don't know how to
accomplish this for the general case for an image with its *own* colors
like my PNG image.
Of course this begs the question: How come IDL doesn't *know* what's
aesthetically pleasing to me? ;)
Rob
David Fanning wrote:
>
> 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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| 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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| 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
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Senior Member |
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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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