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 Post subject: Smart Deblur
Unread postPosted: Wed Nov 21, 2012 12:09 pm 
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Joined: Tue Aug 21, 2007 9:12 pm
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Location: Kentucky, USA
Thought this looked interesting http://www.redsharknews.com/technology/ ... h-software

Of course, the sample looks amazing. The ability to take an unrecognizable photo and turn it into clearly legible text is very cool, and the developer's site http://yuzhikov.com/projects.html has some interesting stuff too. I believe it's a realistic result but a very specific situation.

Probably most interesting is the reading of how the process itself works.. http://yuzhikov.com/articles/BlurredIma ... ation1.htm

So I grabbed the camera (with 18-55 f3.5-5.6 zoom), cranked the lens out of focus and snapped a couple of shots of my jacket and bag. The results are not nearly as impressive.... still, you can now (barely) make out my claws, maybe more setting tweaking is in order. It's also extremely slow, this machine in my office is far more pitiful than the 1.4ghz c2d in my laptop.

Not quite CSI, and you can never get more information that the original input. Only rearrange the information.
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SmartDeblurSample 004.jpg
SmartDeblurSample 004.jpg [ 211.75 KiB | Viewed 343 times ]

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SmartDeblurSample 004 corrected.jpg
SmartDeblurSample 004 corrected.jpg [ 85.03 KiB | Viewed 343 times ]


I would consider the artistic effect useful in it's own right. ;)

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 Post subject: Re: Smart Deblur
Unread postPosted: Wed Nov 21, 2012 4:16 pm 
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wasn't there a tech preview by Adobe that did that?
IIRC, the idea was to generate a "blur kernel" from image features and then finding the reciprocal matrix to unblur it.
it only worked on camera shake blur, not lens blur (because I think to reverse that you need to know parameters of the lens).

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 Post subject: Re: Smart Deblur
Unread postPosted: Fri Nov 23, 2012 1:33 am 
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other than surveillance applications, i don't see anything exciting about deblurring. you ain't burning film these days so if the first picture is unfocussed/blurred you just shoot another one & digicams come with their own hardware-accelerated tricks inside.

camera shake deblur turned into a "product" when the digicams took over. most of them are made of ether and weigh 1gramm. a blurred picture looks horrible since digital is cold as ice and it lacks the fluidity of an equivalently blurred pictured coming from film+print.

guardian452 wrote:
I would consider the artistic effect useful in it's own right. ;)

on a rainy day, apply a mild gel on the lens (on the parts of the frame where you'd like the soft-focus/blur effect). master the technique and go straight to scandinavia :)


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 Post subject: Re: Smart Deblur
Unread postPosted: Fri Nov 23, 2012 2:54 am 
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This is really interesting, from a mathematical perspective. Is it computationally intensive?

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 Post subject: Re: Smart Deblur
Unread postPosted: Fri Nov 23, 2012 4:22 am 
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I would say simple unsharp mask does good enough job in most situations. You can also do it manually instead of some ready made filter for more hands on experience.


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