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Overcoming Vignetting In Photoshop  
User currently offlineRayPettit From United Kingdom, joined May 2002, 608 posts, RR: 0
Posted (12 years 3 weeks 1 day 13 hours ago) and read 2118 times:

Hi,

I'm currently working on an old slide that has a lot of vignetting, in other words, it has a lot of darkened areas around the 'rim'.

The shot is very full frame showing an airliner on approach against an all blue sky - there is very little space between the nose of the a/c and the slide mount!

I'd like to know the best way of improving this pic so I can put the best version possible up on our site. Has anyone any tips that a relative newcomer can master? Is it possible to copy and paste chunks of the blue sky to overwrite the darkened areas or is this problematical when trying to achieve a natural effect, especially when dealing with smaller, awkward areas that need 'joining up'.

Cheers

Ray

12 replies: All unread, jump to last
 
User currently offlineCkw From UK - England, joined Aug 2010, 763 posts, RR: 16
Reply 1, posted (12 years 3 weeks 1 day 12 hours ago) and read 2090 times:

Tricky one - without seeing the pic, I can't be sure, but I doubt cloning will provide the solution, as it is highly unlikely the the blue tones are constant across the sky.

I'm assuming the vignetting has produced a gradual darkening towards the edges. The way I would tackle this is to create a mask over the correctly exposed section of the image, with a significant degree of edge feathering. Then try lightening the unmasked protion of the image. The trick will be to get the initial mask right and just the right amount of feathering - a bit of trial and error I'm afraid.

I wouldn't class this as a "beginners" technique, but an extremely useful one, so worth spending a bit of time learning.

Cheers,

Colin



Colin K. Work, Pixstel
User currently offlineClickhappy From United States of America, joined Sep 2001, 9652 posts, RR: 68
Reply 2, posted (12 years 3 weeks 1 day 12 hours ago) and read 2088 times:
AIRLINERS.NET CREW
PHOTO SCREENER

Hiya Ray  Smile

What version of PS are you using? The cloning tool in version 6 is light years ahead of what is found with version 4. Not sure about 5 or 5.5, or even 7, but I assume 7 would be at least as good as 6.


User currently offlinePhotopilot From Canada, joined Jul 2002, 2805 posts, RR: 18
Reply 3, posted (12 years 3 weeks 1 day 12 hours ago) and read 2071 times:

Any chance of "posting" the image somewhere where we can have a look at it. It might also give us a chance to "play" with the image ourselves in our own Photoshop.

Hey..... it's a potential contest! ! ! Let's see who can do the best retouch job Big grin

Steve


User currently offlineShawn Patrick From United States of America, joined Jan 2000, 2608 posts, RR: 16
Reply 4, posted (12 years 3 weeks 1 day 8 hours ago) and read 2040 times:

Hehe, good idea Photopilot!

I've worked with images with vignetting and I was able to get some pretty good results.

If you want, email me the full-res photo (shawnb777@adelphia.net). I have PS7, so I'll see what I can do.

Regards
Shawn


User currently offlineMikephotos From United States of America, joined Oct 2000, 2923 posts, RR: 54
Reply 5, posted (12 years 3 weeks 1 day 6 hours ago) and read 2024 times:

IIRC there is a Vignetting "action" or "filter" for PS but I personally haven't used it so not sure how effective it is.

Michael


User currently offlineTomh From United States of America, joined May 1999, 960 posts, RR: 2
Reply 6, posted (12 years 3 weeks 1 day 1 hour ago) and read 1986 times:

I have the same problem with some of my older slides, so I'm very interested in the outcome of this discussion. Some of them are typical vignetting like this one


View Large View Medium
Click here for bigger photo!

Photo © Tom Hildreth



while a few others are dark only on one side such as


View Large View Medium
Click here for bigger photo!

Photo © Tom Hildreth

which was from a shutter problem. The solution that works for the first may very well help me with the second, as they appear on the image as similar problems.

Michael, what does "IIRC" mean at the beginning of your 11-04-02 post mean?



User currently offlineWietse From Netherlands, joined Oct 2001, 3809 posts, RR: 55
Reply 7, posted (12 years 3 weeks 1 day ago) and read 1978 times:

Tom,

If I Recal Correctly

Wietse




Wietse de Graaf
User currently offlineCkw From UK - England, joined Aug 2010, 763 posts, RR: 16
Reply 8, posted (12 years 3 weeks 23 hours ago) and read 1970 times:

The vignetting filter in PS is used to ADD a vignette to an image - so not really much help in itself.

However this might be a useful route to create a suitable mask as mentioned above. This can be solved in PS, but it's not easy - as well as masks, you'll have to use layers as well. Cloning on this scale, particularly with film scans is unlikely to be 100% successful, if only because variations in the grain pattern will give the game away. Personally I would find some vignetting preferable to an imperfect fix.

Cheers,

Colin



Colin K. Work, Pixstel
User currently offlineLennymuir From United Kingdom, joined Oct 2002, 434 posts, RR: 6
Reply 9, posted (12 years 3 weeks 15 hours ago) and read 1926 times:

Hi!

I've like this thread. this is something I've been looking at too since I realised my F707 was suffering with DLS (dark left side) slightly. Now I've got my '707 fixed, I don't use this manipulation now.

I used the 'gradient' feature on GIMP for Windows to lighten the left hand side.
It can be used to counteract the darkening effect of vignetting too.

I'm sure the tool is available on Photoshop, you'll just
have to find it and adapt it similarly.

The first photo below is just black.



The second is the gradient applied only to the left hand side.
(Gradients >> Dialogues >> Opacity 50% >> Offset 50% >> Linear >> Lighten Only)
I've heavily enhanced the effect to show you what it looks like on black.
When you apply this gradient to your vignetted pitcures, go easy and start with
minimal values. If you overdo it, it looks really bad an you'll get hue changes.




The third is how the anti-vignetting gradient would look.
(Gradients >> Dialogues >> Opacity 50% >> Offset 50% >> Radial >> Lighten Only)



Get looking into your photoprogrammes and try it out.
I took me a few days to master it.

It is worthwhile.

Cheers

Gerry


User currently offlineRayPettit From United Kingdom, joined May 2002, 608 posts, RR: 0
Reply 10, posted (12 years 3 weeks 14 hours ago) and read 1914 times:

Thanks for your responses so far guys,

Quite a heavy subject and probably not one I fancy trying out after a day at work! Certainly not a ten second job.
BTW, I haven't posted my pic here because I'm a bit unsure about the formatting. I can post it in jpeg, but then I always work my pics in TIF and then convert the file format last thing. I think sending in TIF takes me over the 2 hour timeout connection.

I've only got Photoshop 5 (a cut down version at that) by the way.

Tom, its a shame about the dark side of your Panther - still a stunning shot though!

Ray


User currently offlineShawn Patrick From United States of America, joined Jan 2000, 2608 posts, RR: 16
Reply 11, posted (12 years 3 weeks 13 hours ago) and read 1898 times:

Ray, you could send me a compressed version in jpeg format and play around with it, then tell you how to do it yourself on the Tiff version

User currently offlineJofa From Sweden, joined Apr 2002, 320 posts, RR: 15
Reply 12, posted (12 years 3 weeks 13 hours ago) and read 1898 times:

Try the dodge tool, set it to work on midtones and at a pretty low opacity, lets say 30. Choose a big blurry brush, size 300 maybe. Then carefully "paint" away the vignetting.

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