Sponsor Message:
Aviation Photography Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Selective Sharpening  
User currently offlineMaverick55 From New Zealand, joined Dec 2006, 21 posts, RR: 0
Posted (6 years 8 months 2 weeks 16 hours ago) and read 2203 times:

Can someone please explain exactly what this is and give an explanation as to how you do it. Im happy with selecting just the aircraft when it is only against the sky but how do you go about it when you have something other than sky in the background, buildings, ground etc? Cheers in advance for the help.

13 replies: All unread, jump to last
 
User currently offlineIL76 From Netherlands, joined Jan 2004, 2237 posts, RR: 48
Reply 1, posted (6 years 8 months 2 weeks 16 hours ago) and read 2196 times:

Are you familiar with working with layers?

User currently offlineMaverick55 From New Zealand, joined Dec 2006, 21 posts, RR: 0
Reply 2, posted (6 years 8 months 2 weeks 16 hours ago) and read 2192 times:

I use layers for my normal sharpening, select aircraft --> duplicate layer --> USM --> erase jaggies --> flatten image. Thats about the limit of my expecience with layers.

User currently offlineIL76 From Netherlands, joined Jan 2004, 2237 posts, RR: 48
Reply 3, posted (6 years 8 months 2 weeks 16 hours ago) and read 2182 times:

Ok, good. Well... The way I do it is as follows. I select the sky using the lasso tool and invert the selection when all of the sky is selected. Then I do the sharpening process for the plane, erasing jaggies, etc. The rest of the background was also sharpened, so when I feel that the background is sharpenend too much (lines on the runway, lamp posts, etc.) I manually erase the rest of the background with the eraser with a bigger brush, roughly around the airplane. You don't have to be super meticulous though, as the background is usually out of focus anyway and USM doesn't change all that much.

Ed

PS, all actions mentioned above are done on the sharpened layer.

[Edited 2008-01-07 00:30:02]

User currently offlineMaverick55 From New Zealand, joined Dec 2006, 21 posts, RR: 0
Reply 4, posted (6 years 8 months 2 weeks 15 hours ago) and read 2175 times:

Awesome, thanks for that, thats exactly whay I've been doing already. In some other threads I've read people have said things like 'could use some selective sharpening around the nose' etc. Is the method much the same, lasso the area etc?

User currently offlineIL76 From Netherlands, joined Jan 2004, 2237 posts, RR: 48
Reply 5, posted (6 years 8 months 2 weeks 15 hours ago) and read 2169 times:

Yes. Select the bit that looks softer than the rest, either with the lasso, or free form selection and give it an extra step of USM. In the end, the overall picture should look evenly sharpened.

Ed


User currently offlineMaverick55 From New Zealand, joined Dec 2006, 21 posts, RR: 0
Reply 6, posted (6 years 8 months 2 weeks 15 hours ago) and read 2165 times:

Thanks for your replies. Thats cleared up something thats been bugging me for a while.

Dave


User currently offlineJid From Barbados, joined Dec 2004, 972 posts, RR: 31
Reply 7, posted (6 years 8 months 2 weeks 13 hours ago) and read 2155 times:

You can also selectively sharpen different colour channels. You will notice that most noise is generating in the blue channel when you sharpen, so if you just sharpen the red and green channels you will reduce the amount of noise you create during sharpening.

Jid



G7EPN is back after 15 years! Operating all Bands 80mtrs -> 70cms QRZ DX
User currently offlineGarry From United Kingdom, joined Feb 2006, 185 posts, RR: 3
Reply 8, posted (6 years 8 months 2 weeks 13 hours ago) and read 2139 times:

Just to add to Jid's comments - as sharpening is effectively a contrast enhancement along edges ensure that the layer blend option is changed to luminosity. This effectively is the same as sharpening the Lightness channel in lab mode but without the need to convert from RGB to LAB and back again.

Garry



www.aircanon.co.uk
User currently offlineDerstatic From Sweden, joined Aug 2007, 49 posts, RR: 0
Reply 9, posted (6 years 8 months 2 weeks 12 hours ago) and read 2135 times:

That sounds interesting Garry, would you please explain a little further what effect I should expect if I set blending to luminosity rather than normal. I'm quite new with PS and didn't know about this feature. But will do anything to learn more.

User currently offlineGarry From United Kingdom, joined Feb 2006, 185 posts, RR: 3
Reply 10, posted (6 years 8 months 2 weeks 11 hours ago) and read 2120 times:

Joakim - as sharpening is a local contrast adjustment colour saturation may be affected resulting in colour fringing where the sharpening is applied.

The Luminosity blend mode only lets changes to the tonality of the Sharpening layer show through in the image. In other words, any changes to the tones in the Sharpening layer will be seen in the image, but changes to the colors will not be seen. Consequently, colour fringing is avoided.

You can change the layer blend mode easily - it's located at the top of the layers box and defaults to normal, you'll find luminosity right at the bottom - remember you're only changing the blend mode on the sharpening layer.

Hope this helps (and makes sense).

Garry



www.aircanon.co.uk
User currently offlineJavibi From Spain, joined Oct 2004, 1371 posts, RR: 41
Reply 11, posted (6 years 8 months 2 weeks 11 hours ago) and read 2104 times:

Using Actions/Masks...My Tutorial With Links! (by JeffM Aug 31 2005 in Aviation Photography)

j



"Be prepared to engage in constructive debate". Are YOU prepared?
User currently offlineDerstatic From Sweden, joined Aug 2007, 49 posts, RR: 0
Reply 12, posted (6 years 8 months 2 weeks 5 hours ago) and read 2059 times:

Thats interesting Javibi, I've been playing around a little with those actions and they seem to work. I don't think I've learned to exploit them fully. But I will reprocess a previously rejected photo and see if I come up with a better result using this method compared to my normal one which has granted me 3 accepted shots from about 30 submitted efforts.

Thanks for the explanation Garry, am I right if I say that the colour fringing is the dark/bright areas around lines that appear from sharpening and that using this method of blending will reduce them and that will cause me fewer rejections for oversharpened/jaggied edges?


User currently offlineGarry From United Kingdom, joined Feb 2006, 185 posts, RR: 3
Reply 13, posted (6 years 8 months 2 weeks 5 hours ago) and read 2053 times:

Hi Joakim -

Quoting Derstatic (Reply 12):
colour fringing is the dark/bright areas around lines that appear from sharpening

Spot on

Quoting Derstatic (Reply 12):
using this method of blending will reduce them

Correct

Quoting Derstatic (Reply 12):
and that will cause me fewer rejections for oversharpened/jaggied edges?

If only I could predict that with some certainty! It should certainly help and together with greater control through masking and careful choice of where to sharpen (i.e don't sharpen deep shadows it will only increase the noise) you will be well on the way.

Best of luck
Garry



www.aircanon.co.uk
Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Sharpening RGB Or LAB Mode posted Thu Aug 30 2007 17:18:38 by Garry
Has My Sharpening Gone Seriously Mad? posted Thu Jul 26 2007 04:33:41 by Aero145
The Perfect Sharpening Set. posted Tue Jun 12 2007 15:34:04 by Relic
Sharpening Help! posted Fri Mar 9 2007 06:40:57 by LAXspotter
Enough Sharpening? posted Tue Feb 20 2007 11:29:27 by McG1967
Sharpening Pictures posted Thu Feb 8 2007 19:57:42 by Pride
Help With Sharpening posted Fri Dec 1 2006 00:31:36 by LOCsta
Motive And Sharpening Question posted Fri Sep 15 2006 06:13:29 by MarkJBeckwith
My Sharpening Am I Close? posted Mon Sep 11 2006 07:02:34 by JumboJim747
Sharpening In Photoshop posted Sat Sep 2 2006 21:05:08 by Malandan