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From: jane ? on 4 Jun 2010 21:46
Hi, all
I want to get the PSF of an image ,but I don't know how to do it.
And, can somebody tell me what is the logarithmic image gradient density?
How to get this curve?
Please help me.
Thanks.
From: ImageAnalyst on 5 Jun 2010 01:02
On Jun 4, 9:46 pm, "jane ?" <jane...(a)163.com> wrote:
> Hi, all
> I want to get the PSF of an image ,but I don't know how to do it.
> And, can somebody tell me what is the logarithmic image gradient density?
> How to get this curve?
> Please help me.
> Thanks.
-------------------------------------------------------------------------------------
Look at the blur that a point in your scene gives. Or if you don't
have a known point, look at a line or edge and use the appropriate
relations to transform the Line Spread Function or Edge Response
Function into the Point Spread Function. But you MUST (as far as I
know) have some known object in your scene that is a perfectly sharp
point, line, or edge. Or you can just guess and try some things and
see how sharp your image gets when you correct for the assumed blur.
From: jane ? on 5 Jun 2010 05:06
Thank you for your answer.
I want to ask you about the logrithmtic gradient density. I want to show the figure,but I don't know how to post an figure. The curve looks a little like the Gussian curve. But I don't know what does the logrithmtic mean?
From: sscnekro on 5 Jun 2010 05:37
> I want to show the figure,but I don't know how to post an figure.

Hi Jane, some of the cssm-ers use working e-mails as the newsreader e-mails, you can see it on top of a reply to a post.

> But I don't know what does the logrithmtic mean?

Even under pressure, try to look around and see what the guys do.
http://www.scribd.com/doc/17025419/HighQuality-Motion-Deblurring-From-a-Single-Image
From: Steven Lord on 6 Jun 2010 23:29

"sscnekro " <stiahni.mail(a)zoznam.sk> wrote in message
news:hud5rv$abo$1(a)fred.mathworks.com...
>> I want to show the figure,but I don't know how to post an figure.
>
> Hi Jane, some of the cssm-ers use working e-mails as the newsreader
> e-mails, you can see it on top of a reply to a post.

Yes, that's true. However, you should not simply cold-email posters your
figures -- it's kind of like cold-calling, and few people like that.

http://en.wikipedia.org/wiki/Cold_calling

Instead either put the .fig file (created by SAVEAS) or an image file
(created using PRINT) in some free file hosting site (Google can find you
plenty of possibilities) and include a link to the file in your post. If
you want to email your figures to someone, please ask them before doing so.

--
Steve Lord
slord(a)mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
To contact Technical Support use the Contact Us link on
http://www.mathworks.com


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