Go to a  "printer friendly" view of this message which allow an easy print Printer-friendly copy Go to the page which allows you to send this topic link and a message to a friend Email this topic to a friend
Forums Lobby MASTER YOUR TOOLS - Hardware & Software Digital postprocessing & workflow (Public) Nikon & Nikonians Imaging Software (Public) topic #9396
View in linear mode

Subject: "How to use the highpass filter sharpening tool?" Previous topic | Next topic
William Rounds Gold Member Nikonian since 25th Mar 2011Mon 24-Sep-12 02:09 PM
357 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
"How to use the highpass filter sharpening tool?"


Rambouillet, FR
          

I do not understand how to use the highpass filter adjustment in NX2. When is this more appropriate (perhaps should it always be used?)and does one use in conjonction but prior to the other sharpening adjustment tools?

Next, when I click the highpass filter adjustment the image goes to grey, I use the slider to bring out some definition, but I can never get the image back to color. What do I not do correctly or not understand?

Visit my Nikonians gallery.

  

Alert Printer-friendly copy | Reply | Reply with quote | Top

Replies to this topic

DeanAZ Moderator Expert nature photographer Nikonian since 28th Apr 2007Mon 24-Sep-12 03:40 PM
3707 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#1. "RE: How to use the highpass filter sharpening tool?"
In response to Reply # 0
Mon 24-Sep-12 03:43 PM by DeanAZ

Phoenix, US
          

Howdy William. The proper way to use this tool is to use the blending mode set to Overlay in the Opacity settings. This will have the effect of blending the effect you are seeing (mostly gray with the edges enhanced) and the background image to allow for the sharpening of details larger than the pixel value selected. Remember you can use a brush to apply the sharpening effect only to the areas you want or use color control points to include or exclude parts of the image from the sharpening step.

It is good to use where you want to emphasize fine detail without sharpening noise as would be the case with the standard unsharpen mask that is also available. In general I only apply a small amount of sharpening as part of the picture control and save any sharpening for the end of my processing steps once I know what my target is for the image. The amount and type of sharpening is highly dependent on the final size of the image and the viewing method. Are you printing, at what size, etc.?

Give it a try. There are lots of sharpening tutorials available.


Dean
Phoenix, Arizona USA
Nikonians Team Member
Website: The Splendid Silence of Light

Recent Trips: Grand Canyon 2012 Glen Canyon 2012 West Clear Creek

Visit my Nikonians gallery.

Attachment #1, (jpg file)

  

Alert Printer-friendly copy | Reply | Reply with quote | Top

    
William Rounds Gold Member Nikonian since 25th Mar 2011Mon 24-Sep-12 03:56 PM
357 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#2. "RE: How to use the highpass filter sharpening tool?"
In response to Reply # 1
Mon 24-Sep-12 03:56 PM by William Rounds

Rambouillet, FR
          

Thank you for bringing the blending overlay aspect to my attention. I did not know that. But once I do use the slider for say 2.5 px, at what point do I see the image return to a color image? When I hit the "next step" button my image is still grey.

Visit my Nikonians gallery.

  

Alert Printer-friendly copy | Reply | Reply with quote | Top

        
DeanAZ Moderator Expert nature photographer Nikonian since 28th Apr 2007Mon 24-Sep-12 05:11 PM
3707 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#3. "RE: How to use the highpass filter sharpening tool?"
In response to Reply # 2
Mon 24-Sep-12 05:14 PM by DeanAZ

Phoenix, US
          

I keep the blending mode at Normal while adjusting the pixels to see how strong of an effect I am creating but then I switch the mode to Overlay to see the results in color. I keep it in Overlay for the balance of the editing process.

Sometimes I set the effect with a higher pixel number than I actually need but then slide the opacity down from 100% to some appropriate value while I am looking at the image in color at 100% magnification.

Dean
Phoenix, Arizona USA
Nikonians Team Member
Website: The Splendid Silence of Light

Recent Trips: Grand Canyon 2012 Glen Canyon 2012 West Clear Creek

Visit my Nikonians gallery.

  

Alert Printer-friendly copy | Reply | Reply with quote | Top

arbie Silver Member Nikonian since 13th Mar 2009Wed 26-Sep-12 12:43 PM
20 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
#4. "RE: How to use the highpass filter sharpening tool?"
In response to Reply # 0
Wed 26-Sep-12 12:44 PM by arbie

CA
          

I've read also (possibly from Jason O'Dell) that you should use it only on the luminance channel.



Ralph MacAdam
http://www.flickr.com/photos/rbmac/
Visit my Nikonians gallery.

Attachment #1, (jpg file)

  

Alert Printer-friendly copy | Reply | Reply with quote | Top

Forums Lobby MASTER YOUR TOOLS - Hardware & Software Digital postprocessing & workflow (Public) Nikon & Nikonians Imaging Software (Public) topic #9396 Previous topic | Next topic


Take the Nikonians Tour and learn more about being a Nikonian Wiki /FAQ /Help Listen to our MP3 photography radio channels Find anything on Nikon and imaging technology - fast!

Copyright © Nikonians 2000, 2014
All Rights Reserved

Nikonians®, NikoScope® and NikoniansAcademy™ are trademarks owned by Nikonians.org.
Nikon®, Nikonos® and Nikkor® are registered trademarks of Nikon Corporation.