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Re: Improving the quality of a blocky image

by AJ <arandall85@[EMAIL PROTECTED] > Jun 9, 2008 at 02:43 PM

On Jun 9, 10:30 pm, aruzinsky <aruzin...@[EMAIL PROTECTED]
> wrote:
> Interspersed comments:
>
> On Jun 9, 11:57 am, AJ <arandal...@[EMAIL PROTECTED]
> wrote:
>
>
>
> > I'm impressed!  The edges are very crisp, much better than I am
> > currently getting.  Thank you for going to the effort of experimenting
> > with it and uploading your results.
>
> > It would be great if I could use my results (iterative restoration and
> > interpolation) and then apply your technique to edges, as I think that
> > the "inner" details such as the face look quite good with my
> > restoration technique, and the edges of the image look much better
> > with yours.
>
> The edge preserving method is not post processing and is proprietary.
>
>
>
> > I would be really grateful if you could expand on the process you took
> > to achieve this image, such as the "8X nearest neighbor (box)
> > enlargement".
>
> http://en.wikipedia.org/wiki/Nearest_neighbor_interpolation
>
> I didn't produce any box enlargement.  I pretended that your image was
> a box enlargement of a hypothetical image 1/8 its size.   Thusly, only
> for my convenience, I threw away all information contained in your DCT
> coefficients above 0 frequency.  With respect to reduction, an
> interpolation kernel is typically expanded by a factor inversely
> pro****tional to the scale.  More specifically, the pixels in each of
> your 8x8 blocks were simply averaged to produce one pixel in a reduced
> image.  Then that reduced image was enlarged by my proprietary method
> which incor****ates prior knowledge that the image was a box reduction.
>
> >Did you implement this in Matlab?  I'm not sure what
> > you mean by this...is it a filter you have applied?
>
> No, I implemented SAR Image Processor in C++.  You can download a free
> save disabled demo to play with.  Google it.

Thanks for your reply.

I did find SAR Image Processor after I had responded to your last
message.  However, I am running a Linux OS so unfortunately cannot run
it.

I did however use interpolation to improve the quality of my image, so
thank you for that suggestion.  I have uploaded my "best" attempt at
restoring the image, and it can be seen at:

http://i287.photobucket.com/albums/ll146/arandall85/interpolated_iterated_image.png

To get to this point, I have used blind deconvolution, and then
interpolated the result.  I'm quite happy with this outcome, although
it is a little blurry.  What do you all think?

Ideally, I would like to "fix" the edges in some way, as they are
still a bit blocky, and I would like to sharpen the whole image
slightly - but I think I may be hoping for a bit too much! ;)

If anyone has any further suggestions to improve this image, I would
be really grateful.  Nearly there...

Kind regards,

AJ
 




 19 Posts in Topic:
Improving the quality of a blocky image
AJ <arandall85@[EMAIL   2008-06-09 04:38:09 
Re: Improving the quality of a blocky image
illywhacker <illywacke  2008-06-09 06:02:50 
Re: Improving the quality of a blocky image
bugbear <bugbear@[EMAI  2008-06-09 14:13:19 
Re: Improving the quality of a blocky image
AJ <arandall85@[EMAIL   2008-06-09 08:38:32 
Re: Improving the quality of a blocky image
Martin Brown <|||newsp  2008-06-09 17:36:03 
Re: Improving the quality of a blocky image
aruzinsky <aruzinsky@[  2008-06-09 09:49:43 
Re: Improving the quality of a blocky image
AJ <arandall85@[EMAIL   2008-06-09 10:07:26 
Re: Improving the quality of a blocky image
AJ <arandall85@[EMAIL   2008-06-09 10:57:40 
Re: Improving the quality of a blocky image
aruzinsky <aruzinsky@[  2008-06-09 14:30:36 
Re: Improving the quality of a blocky image
AJ <arandall85@[EMAIL   2008-06-09 14:43:22 
Re: Improving the quality of a blocky image
pisz_na.mirek@[EMAIL PROT  2008-06-10 12:47:25 
Re: Improving the quality of a blocky image
aruzinsky <aruzinsky@[  2008-06-09 21:04:11 
Re: Improving the quality of a blocky image
Martin Brown <|||newsp  2008-06-10 09:46:14 
Re: Improving the quality of a blocky image
aruzinsky <aruzinsky@[  2008-06-10 08:04:21 
Re: Improving the quality of a blocky image
aruzinsky <aruzinsky@[  2008-06-10 09:49:47 
Re: Improving the quality of a blocky image
aruzinsky <aruzinsky@[  2008-06-11 10:12:10 
Re: Improving the quality of a blocky image
AJ <arandall85@[EMAIL   2008-06-12 09:05:28 
Re: Improving the quality of a blocky image
Jacko <jackokring@[EMA  2008-06-12 11:46:19 
Re: Improving the quality of a blocky image
aruzinsky <aruzinsky@[  2008-06-12 15:08:01 

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