Computer Graphics with Photoshop - Re: HELP!! Need extraordinary sharpening of image

Author

Re: HELP!! Need extraordinary sharpening of image

tfoss1@swbell.net

2004-12-15, 11:14 pm

This is my first time with posting onto the groups, and I'm unfamiliar
on attaching a JPG. I'll keep trying, but the photo is a grip and grin
shot of 3 people. Imagine shooting through a heavy diffusion filter!
Any thoughts? I'm now trying to use the "find edges" filter on another
layer, hoping something may work with blending, etc.

John McWilliams

2004-12-15, 11:14 pm

tfoss1@swbell.net wrote:

> This is my first time with posting onto the groups, and I'm unfamiliar
> on attaching a JPG. I'll keep trying, but the photo is a grip and grin
> shot of 3 people. Imagine shooting through a heavy diffusion filter!
> Any thoughts? I'm now trying to use the "find edges" filter on another
> layer, hoping something may work with blending, etc.
>
Typically, you'd toss the picture onto a web site, and then copy and
past the URL into a post replying to the last message in your thread.

Truly out of focus can't be focussed, but it maybe can be altered to
look, ah, better, if not sharper.

--
John Mcwilliams

Psicotix

2004-12-15, 11:14 pm

tfoss1@swbell.net wrote:
> Due to a lens malfunction, I have an image needed by a client that is
> very out of focus. Any suggestions for sharpening? It's going to
need
> more than the typical unsharp mask.

An obscurish part solution is making a duplicate layer,
running the Filter->Other->High Pass(6 ish? Play around)
on this layer and then setting layer properties to overlay.
The higher the High Pass is set the darker the edges will become.

Perhaps setting an action with interaction (whatever that
little red box on the actions panel is) on the High Pass
would be the best way to experiment with this.
This does mess with your colours quite badly iirc.

Best wishes,
Dave

tfoss1@swbell.net

2004-12-15, 11:14 pm

Thanks Dave, I'll give it a spin. My other attempts are in vain, so I
appreciate your feedback. I can deal with the color shifts; just
really need to at least add some edge sharpness.

Terry

Psicotix

2004-12-15, 11:14 pm

> The higher the High Pass is set the darker the edges will become.

Sorry, that was completely wrong. More contrasty? Sorry, it's late here.

bogus

2004-12-15, 11:14 pm

It gets kinda' complicated but Deke Mcclelland describes a process in the
PS 7 Bible. Here is synopsis

Dupe one of color channels
Filter>Stylize>Find Edges
Invert
Filter>Other>Maximum
Filter>Noise>Median
Filter>Blur>gaussian
Return to composite view
Convert the mask to a selection
Filter>Sharpen>Unsharp Mask - 500%, Radius 2, Threshold 0

Basically what this does is take the elements that have sharp distinctions
and makes a mask of them. When the unsharp mask filter is applied, the
smooth areas are masked out so they do not get grainy.

As always, trial and error must be employed. Sometimes, what you got is as
good as you can get.

Good luck.

tfoss1@swbell.net wrote:

> Thanks Dave, I'll give it a spin. My other attempts are in vain, so I
> appreciate your feedback. I can deal with the color shifts; just
> really need to at least add some edge sharpness.
>
> Terry
>

Bart van der Wolf

2004-12-16, 12:14 pm

"Psicotix" <psicotix@nusense.co.uk> wrote in message
news:1103162031.964218.127750@z14g2000cwz.googlegroups.com...
SNIP
> This does mess with your colours quite badly iirc.

Only if you leave the High pass layer in RGB. If you desaturate it (or
channel mix to monochrome) it will only affect the contrast of the
chosen spatial frequency. One can improve multiple frequencies with
multiple HP layers and, after flattening, the procedure can be
repeated multiple times.

What the OP really needs, is an attempt with a deconvolution method.
Recommendations depend on the image (size/noise), but the
timeframe/deadline seems too short/soon to find the best solution.

Bart

ggull

2004-12-17, 12:14 pm

"Bart van der Wolf" <bvdwolf@no.spam> wrote
> What the OP really needs, is an attempt with a deconvolution method.
> Recommendations depend on the image (size/noise), but the
> timeframe/deadline seems too short/soon to find the best solution.

my thought exactly.
I wonder if de-focusing in camera lenses (if that's the term I'm looking
for) is consistent enough across various types, focal lengths, etc., etc.
that a solution with one or two parameters is possible, so that a plug in
could be devised with the usual slider or two.
If so, I'd be surprised if someone hasn't done that.

Psicotix

2004-12-18, 12:14 pm

tfoss1@swbell.net

2004-12-18, 7:14 pm

John McWilliams

2004-12-20, 4:14 am

Warren Sarle

2004-12-20, 7:14 pm

In article <9_Odncw_C-19n17cRVn-ig@rcn.net>,
"ggull" <ggullSPAM@NOTrcn.com> writes:
> "Bart van der Wolf" <bvdwolf@no.spam> wrote
>
> my thought exactly.
> I wonder if de-focusing in camera lenses (if that's the term I'm looking
> for) is consistent enough across various types, focal lengths, etc., etc.
> that a solution with one or two parameters is possible, so that a plug in
> could be devised with the usual slider or two.
> If so, I'd be surprised if someone hasn't done that.

There are several such products, such as Focus Fixer and Focus Magic,
as well as high-end expensive scientific applications. But none of
these will do what the OP apparently wants, which is currently possible
only on TV shows.

--

Warren S. Sarle SAS Institute Inc. The opinions expressed here
saswss@unx.sas.com SAS Campus Drive are mine and not necessarily
(919) 677-8000 Cary, NC 27513, USA those of SAS Institute.

Psicotix

2004-12-21, 12:14 pm

ggull wrote:
> "Bart van der Wolf" <bvdwolf@no.spam> wrote
method.[color=darkred]
>
> my thought exactly.
> I wonder if de-focusing in camera lenses (if that's the term I'm
looking
> for) is consistent enough across various types, focal lengths, etc.,
etc.
> that a solution with one or two parameters is possible, so that a
plug in
> could be devised with the usual slider or two.
> If so, I'd be surprised if someone hasn't done that.

At our studio muckups where sharpening is necessary occur either
when a photographer has moved the camera focus point and/or focused
incorrectly. 'de-focusing in camera lenses' is a very polite
way of describing their incompetence ;)

ds

ggull

2004-12-30, 4:14 am

"Psicotix" <psicotix@nusense.co.uk> wrote ...
> ggull wrote:
> looking
> etc.
> plug in
>
> At our studio muckups where sharpening is necessary occur either
> when a photographer has moved the camera focus point and/or focused
> incorrectly. 'de-focusing in camera lenses' is a very polite
> way of describing their incompetence ;)

Well, I was referring to the action of the lens on the image, not the
operator on the lens. But feel free to borrow the term :-).