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selecting only "in Focus" part of an image

408 views9 repliesLast post: 10/23/2004
imageselectpartfocus
@Stephan
2004-10-21 22:56:28
Hi all,

Just toying with an idea.
Does anyone have a technique to select only sharp parts of an image that would not involve any lasso, pen tool or similar ways of "hand picking"of course.

Stephan
#1
@Corey
2004-10-21 23:44:48
To select anything using Photoshop, some sort of selection tool MUST be used. (well, I guess you could "select" various tools, etc. without one!) Youcan avoid "hand picking" by "mouse picking." ;-D

The idea sounds cool though. Some sort of tool that would select discriminately by level or degree of focus. We could call it the f-stop tool or something.

Peadge :-)

"Stephan" wrote in message
Hi all,

Just toying with an idea.
Does anyone have a technique to select only sharp parts of an image that would not involve any lasso, pen tool or similar ways of "hand picking"of course.

Stephan
#2
@Hecate
2004-10-22 01:11:31
On Thu, 21 Oct 2004 22:56:28 GMT, Stephan wrote:

Hi all,

Just toying with an idea.
Does anyone have a technique to select only sharp parts of an image that would not involve any lasso, pen tool or similar ways of "hand picking"of course.
The only thing that even approaches that that I can think of would be find edges...

--

Hecate - The Real One

veni, vidi, reliqui
#3
@Stephan
2004-10-22 01:59:23
Hecate wrote:
On Thu, 21 Oct 2004 22:56:28 GMT, Stephan wrote:

Hi all,

Just toying with an idea.
Does anyone have a technique to select only sharp parts of an image that would not involve any lasso, pen tool or similar ways of "hand picking"of course.

The only thing that even approaches that that I can think of would be find edges...
Yes I thought of High Pass and others but can't get far enough
#4
@Stephan
2004-10-22 02:03:42
Peadge wrote:
To select anything using Photoshop, some sort of selection tool MUST be used. (well, I guess you could "select" various tools, etc. without one!) Youcan avoid "hand picking" by "mouse picking." ;-D

No way, no mouse here! Stylus picking maybe.

The idea sounds cool though. Some sort of tool that would select discriminately by level or degree of focus. We could call it the f-stop tool or something.

The idea would be to combine macro photography done with different focus setting in order to get a very large depth. Would be kind of cool and I am sure there is a way... there is always a way with Photoshop!

Stephan
#5
@nooo-spammm-pleaseeetox
2004-10-22 04:31:55
On Thu, 21 Oct 2004 22:56:28 GMT, Stephan wrote:

Hi all,

Just toying with an idea.
Does anyone have a technique to select only sharp parts of an image that would not involve any lasso, pen tool or similar ways of "hand picking"of course.

Stephan

Do a search for CombineZ it is just what you are looking for!

Tony
#6
@Mike Russell
2004-10-22 04:36:38
Stephan wrote:
Peadge wrote:
To select anything using Photoshop, some sort of selection tool MUST be used. (well, I guess you could "select" various tools, etc. without one!) Youcan avoid "hand picking" by "mouse picking." ;-D

No way, no mouse here! Stylus picking maybe.

The idea sounds cool though. Some sort of tool that would select discriminately by level or degree of focus. We could call it the f-stop tool or something.

The idea would be to combine macro photography done with different focus setting in order to get a very large depth. Would be kind of cool and I am sure there is a way... there is always a way with Photoshop!

Make each of your images a layer, with the background layer being the one focussed furthest away. Subtract each layer from a blurred copy of itself, and use that result as a layer mask for that layer. Use levels to tune each mask to select the sharpest areas from each layer.

You will probably also have to resize each layer slightly, depending on the geometry of your lens.
--

Mike Russell
www.curvemeister.com
www.geigy.2y.net
#7
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