|  | High Pass Filter in PSP9 | | |
| | | m.fuerst |  |
|  Posted: Wed May 28, 2008 8:24 pm Post subject: High Pass Filter in PSP9 |  |
Is ther a script or other add-on that can simulate a high pass filter in
PSP9 ? |
| |
| | | JoeB | |
| | Posted: Wed May 28, 2008 8:56 pm Post subject: Re: High Pass Filter in PSP9 | |
"m.fuerst" <m.fuerst@insightbb.com> wrote in news:483ddb40_2@cnews:
| Quote: |
Is ther a script or other add-on that can simulate a high pass filter in
PSP9 ?
|
Do you mean the High Pass filter in Edge Effects in later versions of PSP,
or do you mean the High Pass Sharpen filter?
Regards,
JoeB |
| |
| | | Fred Hiltz | |
| | Posted: Wed May 28, 2008 9:52 pm Post subject: Re: High Pass Filter in PSP9 | |
| |  | |
Trev wrote:
| Quote: | In news:483ddb40_2@cnews,
m.fuerst@insightbb.com> m.fuerst bashed on keyboard and
typed:
Is ther a script or other add-on that can simulate a high
pass filter in PSP9 ?
This might help
User defined settings
|
I'll add this procedure for high-pass sharpening, which can be
scripted to do what the PSP 10 built-in filter does. (That's how
most of the "new" features in 10 came about.)
Spandex Rutabaga wrote it in the Paint Shop Pro 8 newsgroup on
October 8, 2007.
_________________________________________________
I assume you mean a high pass *sharpen* filter (which a something
a little different from a high pass filter). Neither exists in
PSP 8 but it is easy to implement a high pass sharpen filter as
a series of steps. You can record them as a script and have "one
click" access to the result by binding the script to an icon.
Here are the steps you need:
1. Duplicate the image layer.
2. Duplicate the duplicate layer.
3. Set the opacity of the topmost layer to 50%.
4. Gaussian Blur the layer. Start with something like a Radius
of 1.00. This is where and how you define what "high" spatial
frequencies you are going to "pass".
5. Do Negative Image on the blurred layer.
6. Switch off the visibility of the original image layer.
7. Merge Visible the top two layers. The result is the difference
between the unblurred and blurred images, which is the fine
detail or the high spatial frequency component you need. Later
this component will be added back to the original to enhance
the detail and sharpen the image. (If you stopped here the
merged layer would constitute a high pass filter but we are
going to add steps to make it a high pass sharpen filter.)
8. Optionally run Histogram Stretch on the merged result layer.
This will magnify the fine detail.
9. Make your original layer visible again.
10. Set the blend mode of the topmost layer to Hard Light, Soft
Light or Overlay depending on how aggressive you want the
effect to be and adjust the layer opacity to control the
sharpening effect.
I wouldn't bother recording step 10 in a script but would just
adjust it by hand. All the recorded steps 1 to 9 can be marked
Silent in the script but I would make step 4 interactive so you
can easily control what your high pass sharpen filter does and
what in the image it selects for enhancement.
_________________________________________________
--
Fred Hiltz, fhiltz at yahoo dot com |
| |
| | | RoseW | |
| | Posted: Thu May 29, 2008 12:22 pm Post subject: Re: High Pass Filter in PSP9 | |
"JoeB" <mymail@myserver.com> wrote in message
news:Xns9AACAC5C1DB09JoeB@207.107.16.194...
|
| "m.fuerst" <m.fuerst@insightbb.com> wrote in news:483ddb40_2@cnews:
|
| >
| > Is ther a script or other add-on that can simulate a high pass filter in
| > PSP9 ?
|
| Do you mean the High Pass filter in Edge Effects in later versions of PSP,
| or do you mean the High Pass Sharpen filter?
|
| Regards,
|
| JoeB
I inquired about this High Pass Edge effects filter but automatically posted
the query in the Photography group ~) I must admit that I hadn't
investigated it before and I see that it just might have some uses but where
to fit it into a workflow was one of my queries and relative to other
actions such as a small saturation adjustment.
Rose |
| |
| | | Spandex Rutabaga | |
| | Posted: Thu May 29, 2008 9:04 pm Post subject: Re: High Pass Filter in PSP9 | |
"m.fuerst" wrote:
| Quote: |
Is ther a script or other add-on that can simulate a high pass filter in
PSP9 ?
|
Which do you want:
1. A high pass filter, namely one that suppresses (i.e. blurs)
low spatial frequencies (i.e. large details) leaving high
spatial frequencies (i.e. small details) unaffected
2. A high pass sharpen filter which combines high spatial
frequencies (i.e. small details) with the original image
using blend modes in order to sharpen the image |
| |
| | | m.fuerst | |
| | Posted: Fri May 30, 2008 9:07 pm Post subject: Re: High Pass Filter in PSP9 | |
Are there on-line tutorials explaining the philosopy behind and use of user
defined filters in PSP9 ?
"Trev" <trevbowden@dsl.pipex.cominvalid> wrote in message
news:483de02d_3@cnews...
| Quote: |
In news:483ddb40_2@cnews,
m.fuerst@insightbb.com> m.fuerst bashed on keyboard and typed:
Is ther a script or other add-on that can simulate a high pass filter
in PSP9 ?
This might help
User defined settings
--
Trev
Nobody is perfect.
But Being a Yorkshire man is as close as you can get.
|
|
| |
| | | m.fuerst | |
| | Posted: Fri May 30, 2008 9:11 pm Post subject: Re: High Pass Filter in PSP9 | |
I guess both.
I first posted my question because I saw an article about using high pass
filters to make complex selections.
I then saw other articles which discussed high pass filters to sharpen
images.
"Spandex Rutabaga" <SpRu@agabatur.xednaps> wrote in message
news:483F3681.498AA759@agabatur.xednaps...
| Quote: |
"m.fuerst" wrote:
Is ther a script or other add-on that can simulate a high pass filter in
PSP9 ?
Which do you want:
1. A high pass filter, namely one that suppresses (i.e. blurs)
low spatial frequencies (i.e. large details) leaving high
spatial frequencies (i.e. small details) unaffected
2. A high pass sharpen filter which combines high spatial
frequencies (i.e. small details) with the original image
using blend modes in order to sharpen the image
|
|
| |
| | | Ilya Razmanov | |
| | Posted: Sat May 31, 2008 9:52 am Post subject: Re: High Pass Filter in PSP9 | |
On Sat, 31 May 2008 03:11:01 +0400, m.fuerst <m.fuerst@insightbb.com>
wrote:
| Quote: | I guess both.
I first posted my question because I saw an article about using high pass
filters to make complex selections.
|
If you need simple highpass filter close to that one of Photoshop, you may
try this plugin made by me:
LINK
Well, you can also try using PSP native capabilities. Basically, all you
need is Gaussian Blur plus some image arithmetics. I beleive Spandex
already explained this method pretty well; about the only advantage of the
plugin over PSP script is that you get instant preview (plus some more
optons); other than that, the math is the same.
--
Ilya Razmanov
LINK - Photoshop plug-in filters |
| |
| | | Spandex Rutabaga | |
| | Posted: Sat May 31, 2008 5:38 pm Post subject: Re: High Pass Filter in PSP9 | |
| | | |
Ilya Razmanov wrote:
| Quote: |
On Sat, 31 May 2008 03:11:01 +0400, m.fuerst <m.fuerst@insightbb.com
wrote:
I guess both.
I first posted my question because I saw an article about using high pass
filters to make complex selections.
If you need simple highpass filter close to that one of Photoshop, you may
try this plugin made by me:
LINK
|
I keep forgetting to point people to your stuff. Sorry. Ilya
has other good things at his site. Check out the haloless
sharpening for instance: LINK
The example at the link Ilya gave is also a good illustration
of how to compensate for uneven illumination that varies slowly
across the image compared to the color variations that represent
the subject of the image. This is one reason for caring about
the High Pass filter. You would use it with a Gaussian blur
radius comparable to the scale at which the illumination varies,
i.e. quite a large radius (many tens of pixels) when the lighting
varies across the whole image. (If you use too small a radius
your image will acquire halos around the edges of objects.) On
the other hand, when you want to use a High Pass filtered layer
for sharpening you would use a very small radius, say a few
pixels or less. Slightly larger radii give a local contrast
enhancement effect somewhat similar to Clarify. You have to
be careful however to avoid halos when using such intermediate
radii. One way to do that is to use the High Pass layer at low
opacity. Useful blend modes for a High Pass layer being used for
sharpening or local contrast enhancement are Overlay, Soft Light
and Hard Light. |
| |
| | | Dave Symes | |
| | Posted: Sat May 31, 2008 6:45 pm Post subject: Re: High Pass Filter in PSP9 | |
In article <4841A93C.A7FC31FA@agabatur.xednaps>,
Spandex Rutabaga <SpRu@agabatur.xednaps> wrote:
[Snip]
SR., I can't remember, was it you or maybe Jackie who posted a HighPass
sharpening script for use with PSP 9?
I'm on a non Windows/PSP machine ATM. so I can't look for myself.
Dave S
-- |
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