Smartfocus of HP, help

Hi Marvin, Thank you very much but indeed there is a method to do that
task. They estimate the PSF and call the method the
"blind-deconvolution".



Marvin wrote:
> AE lover wrote:
> > Hello,
> >
> > Is there anybody out there trying the "smartfocus" function of HP?
> > "Smartfocus" was announced to be a success among the Real Life
> > technology that HP includes in new modern digital cameras and inkjet
> > printers. I am trying this function in my HP photosmart 8250. Before
> > testing, I guessed Smartfocus is to automatically correct out of focus
> > images. However the smartfocus of my printer seems not to work that
> > way. It cannot correct any out of focus image. Moreover in the manual,
> > HP just says that Smartfocus is to create high-resolution images by
> > sharpening low resolution files. And actually, it does. It indeed
> > increases resolution for some images. But "deconvolution" can also
> > increase the resolution by refocusing (or sharpening) the image. Now I
> >
> > am getting confused if Smartfocus of HP is the function to correct out
> > of focus images. If so, it seems that this function of HP doesn't work
> > very well. Can you please clarify my confusion?
> >
> >
> > Thanks
> >
>
> There is no way to correct an out of focus image without
> knowing technical details about the camera that go under the
> name "modulation transfer function", and doing what is
> called "deconvolution". I haven't heard of anyone doing
> that for a digicam. It is probably used for spy satellites
> - but those agencies aren't talking about it. HP is
> probably using an edge-enhancement algorithm that gives the
> appearance of a crisper image, which looks better focussed.
 >> Stay informed about: Smartfocus of HP, help 

Hi Roy,

>
> There is no way an out of focus image can be rectified by a Printer. It
> might be possible, only possible, to improve the situation a bit in an
> editing program, but there is no way a Printer is going to be able to do
> that.
>

I think HP printers are possible to do that. They can write a driver
for their printers that will apply blind deconvolution to deblur an out
of focus (blurred) image and then print the image out. Of course, the
result is far from being perfect since in fact some information is
missing due to "out of focus".However sometimes blind-deconvolution has
some amazing results.


Thanks


Roy G wrote:


> You are not confused. It does not, and cannot work.
>
> I have not read anything about this so called "Smartfocus", but it most
> certainly cannot turn a low resolution image into a high resolution image.
> It may be able to apply a bit of "Edge Sharpening" or even "Unsharp
> Masking", but that has nothing to do with high or low resolution.
>
> Camera manufacturers have a very low opinion of the level of photographic
> knowledge of the general public, and generally speaking they are correct.
> Most members of these News Groups do know about photography, and can tell
> the difference between Hype and Fact.
>
> Roy G
 >> Stay informed about: Smartfocus of HP, help 

"AE lover" <aelover11.DeleteThis@gmail.com> wrote in message
news:1153578059.985370.307280@m79g2000cwm.googlegroups.com...
> Hello,
>
> Is there anybody out there trying the "smartfocus" function of HP?
> "Smartfocus" was announced to be a success among the Real Life
> technology that HP includes in new modern digital cameras and inkjet
> printers. I am trying this function in my HP photosmart 8250. Before
> testing, I guessed Smartfocus is to automatically correct out of focus
> images. However the smartfocus of my printer seems not to work that
> way. It cannot correct any out of focus image. Moreover in the manual,
> HP just says that Smartfocus is to create high-resolution images by
> sharpening low resolution files. And actually, it does. It indeed
> increases resolution for some images. But "deconvolution" can also
> increase the resolution by refocusing (or sharpening) the image. Now I
>
> am getting confused if Smartfocus of HP is the function to correct out
> of focus images. If so, it seems that this function of HP doesn't work
> very well. Can you please clarify my confusion?
>
>
> Thanks


Hi.

While HP do make good Printers and Computers, their Camera's are something
else.

There is no way an out of focus image can be rectified by a Printer. It
might be possible, only possible, to improve the situation a bit in an
editing program, but there is no way a Printer is going to be able to do
that.

You are not confused. It does not, and cannot work.

I have not read anything about this so called "Smartfocus", but it most
certainly cannot turn a low resolution image into a high resolution image.
It may be able to apply a bit of "Edge Sharpening" or even "Unsharp
Masking", but that has nothing to do with high or low resolution.

Camera manufacturers have a very low opinion of the level of photographic
knowledge of the general public, and generally speaking they are correct.
Most members of these News Groups do know about photography, and can tell
the difference between Hype and Fact.

Roy G
 >> Stay informed about: Smartfocus of HP, help 

"AE lover" <aelover11 DeleteThis @gmail.com> wrote in message
news:1153615456.224503.58810@75g2000cwc.googlegroups.com...
> Hi Roy,
>
>>
>> There is no way an out of focus image can be rectified by a Printer. It
>> might be possible, only possible, to improve the situation a bit in an
>> editing program, but there is no way a Printer is going to be able to do
>> that.
>>
>
> I think HP printers are possible to do that. They can write a driver
> for their printers that will apply blind deconvolution to deblur an out
> of focus (blurred) image and then print the image out. Of course, the
> result is far from being perfect since in fact some information is
> missing due to "out of focus".However sometimes blind-deconvolution has
> some amazing results.
>
>
> Thanks
>
Dont wish to be rude, you are not confused, you are a F****** Idiot.

Roy G
 >> Stay informed about: Smartfocus of HP, help 

"Roy G" <roy.gibson1.DeleteThis@REMOVE.tesco.net> wrote in message
news:15Iwg.27941$EK1.495@newsfe4-gui.ntli.net...
>
> "AE lover" <aelover11.DeleteThis@gmail.com> wrote in message
> news:1153615456.224503.58810@75g2000cwc.googlegroups.com...
>> Hi Roy,
>>
>>>
>>> There is no way an out of focus image can be rectified by a Printer. It
>>> might be possible, only possible, to improve the situation a bit in an
>>> editing program, but there is no way a Printer is going to be able to do
>>> that.
>>>
>>
>> I think HP printers are possible to do that. They can write a driver
>> for their printers that will apply blind deconvolution to deblur an out
>> of focus (blurred) image and then print the image out. Of course, the
>> result is far from being perfect since in fact some information is
>> missing due to "out of focus".However sometimes blind-deconvolution has
>> some amazing results.
>>
>>
>> Thanks
>>
> Dont wish to be rude, you are not confused, you are a F****** Idiot.
>
> Roy G
Hi All.

Just in case you or anyone else should think that I am being needlessly
cruel, I quote from the Idiots original post -- "However the smartfocus of
my printer seems not to work that way. It cannot correct any out of focus
image."

Now it seems that his printer can indeed perform this miraculous function.
So why did he ask?

I still think he is an idiot, perhaps only a misguided idiot. No, he is a
F****** Idiot.

Roy G
 >> Stay informed about: Smartfocus of HP, help 

Roy G wrote:

> Yea.
>
> Go on, ask HP Customer Service about the HP8250 printer's failure to
> re-focus an unfocussed image.
>
> I, and others, would be very interested in hearing the outcome.


Roy,

to be honest, I'd just leave this guy be. If he wants to go on and
believe that his printer is this magic box that can magically conjure up
perfectly focused images using data that doesn't exist, then let him be
blissfully misinformed. His belligerence belies the fact that he
really, really wants to believe that his printer can compensate for his
lack of skill, and if it lets him think he's an awesome photographer and
an "imaging expert," then so be it. The rest of us know better.




--
E-mail fudged to thwart spammers.
Transpose the c's and a's in my e-mail address to reply.
 >> Stay informed about: Smartfocus of HP, help 

"irwell" <hook DeleteThis @yahoo.com> wrote in message
news:mic7c2tsgsr65ma3n1udju2154i4qjov9d@4ax.com...
> On Sun, 23 Jul 2006 10:19:31 -0700, irwell <hook DeleteThis @yahoo.com> wrote:
>
>>>
>>Before you come across as an insulting smart arse maybe you should do
>>some checking too
>>Have a look at this freeware for a start who have such a deconvolution
>>tool.
>>Image Analyser .
>
> http://meesoft.logicnet.dk/Analyzer/


Hi.

As you can gather, I was unaware of the existence of this program, which
looks very interesting, and I will download it and give it a try.

I still think my original answer was a reasonable one.

I only started to get lippy with this clown because of the way he leapt in
and told me off, when I advised him that his printer was not faulty, just
because it could not refocus an out of focus image.

He is the one who admitted to being confused, about what it was intended to
do. He claimed in his first post that it could not refocus, yet in his
second he claimed it could.

He only picked up on the Deconvolution from Marvin's post.

I am still certain that his printer, or any printer, was never intended to
automatically re-focus an out of focus image sent to it.

I do not try to rubbish anyone who really needs help.

BUT Lippy Smart-mouths who know nothing, and try to put me down, had better
watch out.

Roy G
 >> Stay informed about: Smartfocus of HP, help 

"Isaiah Beard" <sacredpoet.DeleteThis@sacredpoet.com> wrote in message
news:12c7khfmrt6bf52@corp.supernews.com...
> Roy G wrote:
>
>> Yea.
>>
>> Go on, ask HP Customer Service about the HP8250 printer's failure to
>> re-focus an unfocussed image.
>>
>> I, and others, would be very interested in hearing the outcome.
>
>
> Roy,
>
> to be honest, I'd just leave this guy be. If he wants to go on and
> believe that his printer is this magic box that can magically conjure up
> perfectly focused images using data that doesn't exist, then let him be
> blissfully misinformed. His belligerence belies the fact that he really,
> really wants to believe that his printer can compensate for his lack of
> skill, and if it lets him think he's an awesome photographer and an
> "imaging expert," then so be it. The rest of us know better.
>
>
>
Hi.

Thanks for the support.

I did rather go for the clown, and even Grumpy Old Git, me, would not have
been quite so grumpy, had I managed to get to bed last night. You really
don't want to know why.

I agree, he is not worth the effort.

Roy G
 >> Stay informed about: Smartfocus of HP, help 

AE lover wrote:
> Hi Marvin, Thank you very much but indeed there is a method to do that
> task. They estimate the PSF and call the method the
> "blind-deconvolution".

Where did you find that? I couldn't find an explanation of
how SmartFocus works at hp.com. The closest I found
suggested that it is an interpolation algorithm, to increase
the number of pixels. There are several such algorithms.
The one example I found showed two small pictures, with no
striking improvement in resolution - just brighter colors.
 >> Stay informed about: Smartfocus of HP, help