How can estimate the PSF function to deblur an image of plate licence of a car

Asked Jul 09 '14 at 19:02

Active Sep 22 '15 at 07:54

Viewed 394 times

I want to deblur an image of a licence plate of a car. I have used the ImageDeconvolve[] function and Sharpen[] but the problem is still difficult because I need to estimate the kernel or the PSF function. A lot of techniques have been used to estimate the PSF. I wondered how the Fourier transform of the blurred image can give us an idea about the PSF function?

psfMotion[dim_?NumberQ, theta_?NumberQ] :=
  Module[{PSF},
    PSF = ConstantArray[0.0, {dim, dim}];
    PSF[[Ceiling[dim / 2.0], All]] = 1.0 / dim;
    Return[ImageRotate[Image[PSF], theta  Degree]];
   ];
psf = psfMotion[14, 0];
Table[ImageDeconvolve[licence, psfMotion[2, \[Theta]], 
  Method -> "RichardsonLucy", MaxIterations -> 15], {\[Theta], 0, 
  180}]

edited Sep 22 '15 at 07:54

dr.blochwave

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asked Jul 09 '14 at 19:02

BetterEnglish

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In the movies, they just say: "computer: enhance!" If that doesn't work, it would be good to provide more detail in your question, e.g., an example image and what else you have tried. – Jens Jul 09 '14 at 19:09
@Jens, I edited my question – BetterEnglish Jul 09 '14 at 20:36
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Did you try anything or are you simply hoping someone's either done this before or is really bored and will do it? – acl Jul 09 '14 at 20:58
http://i.stack.imgur.com/2gU8E.png – rm -rf Jul 09 '14 at 21:06
@rm-rf, can you show me How did you find this please! – BetterEnglish Jul 09 '14 at 21:07
I enhanced it, like in Jens' suggestion :D – rm -rf Jul 09 '14 at 21:08
which algorithm did you used please? – BetterEnglish Jul 09 '14 at 21:09
@rm-rf, why the blind deconvolution did not work – BetterEnglish Jul 09 '14 at 21:10
@rm-rf, did you used a special software? – BetterEnglish Jul 09 '14 at 21:27
@rm-rf the licence is not true. thanks – BetterEnglish Jul 09 '14 at 22:08
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The example image is clearly limited by the image resolution (pixelation) and not by the point spread function of the camera. So it's pretty hopeless. There is a Wolfram Blog post about this topic. – Jens Jul 09 '14 at 22:58
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Let's enhance: https://www.youtube.com/watch?v=LhF_56SxrGk – Simon Rochester Sep 18 '15 at 06:57
Where is the blurred image for licence? – Daniel Lichtblau Sep 18 '15 at 14:22

How can estimate the PSF function to deblur an image of plate licence of a car

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