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Tips How Eliminate Glossy Sheen?

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  #1  
Old 05-01-2014, 11:11 AM
KenithO KenithO is offline
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Tips How Eliminate Glossy Sheen?

Hi

Am new to both photo restoration and this forum.

Am trying to make a digital copy of the glossy photo I would like to restore.

My problem is reflections off the glossy surface of the photo which are especially noticeable in the darker areas. To date, no matter how I place the photo in relation to the light am unable to completely eliminate them.

Googled and while I found things like "Matte Finish Spray Eliminates Glossy Sheen" (I do not want to alter the original photo) have not found any easy way to eliminate these reflections.

Appreciate any suggestions!!!

Thanks

Ken
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Old 05-01-2014, 01:58 PM
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Tony W Tony W is online now
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Re: Tips How Eliminate Glossy Sheen?

If the problem is related to seeing your own reflection, camera and the background behind camera a trick that can work is to use a sheet of black canvas.

At the correct copy distance cut a sheet of black material with a small slit cut for the lens to peep through. Shoot with this set up

The material will need to be large enough to cover the camera field of view in relation to the size of the copy work. Place your lights in relation to the copy work usually two lights set around 45 degrees (or a lesser angle may be desirable) relative to the copy work

Last edited by Tony W; 05-01-2014 at 02:11 PM.
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Old 05-02-2014, 08:50 AM
KenithO KenithO is offline
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Re: Tips How Eliminate Glossy Sheen?

Hi Tony,

Thank you for the suggestion.

Sorry for being unclear when I posted this question.

Will try to restate.

The reflections off the glossy surface of the photo are not of me but just bright areas which are especially noticeable in the darker areas.

Am now thinking it is caused by the irregular glossy surface of the original photo (think this surface texture is to give the impression of canvas).

Hope someone else has had this problem and solved it.

Thanks again for your help.

Ken
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Old 05-02-2014, 11:17 AM
Mike Mike is online now
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Re: Tips How Eliminate Glossy Sheen?

Try a search on here for "double polarized light".

Works like a champ.
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Old 05-02-2014, 11:23 AM
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Re: Tips How Eliminate Glossy Sheen?

Ahh, I see. As you said glossy the assumption was catching reflections rather than texture. Go with the search Mike suggested or try another search for Fourier (FFT) which may help remove texture. If you can post an example (just a small area will do) of the problem print
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Old 05-02-2014, 11:47 AM
KenithO KenithO is offline
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Re: Tips How Eliminate Glossy Sheen?

Mike & Tony,

Thanks for the comments.

Again am sorry for my wording.

"If you can post an example (just a small area will do) of the problem print"

Yes I think this would be the best because since posting have been searching using textured photos and have found
http://www.bayphoto.com/mounting-fin...s-coatings.htm
http://www.nationsphotolab.com/texturedprints.aspx

I will post a sample. Please give me detailed instructions how and maximum size.

Thanks again for the help!!!

Ken
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Old 05-02-2014, 01:02 PM
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Re: Tips How Eliminate Glossy Sheen?

Maximum size is 100KB which should be enough to post an example. Detailed method here:
http://www.retouchpro.com/forums/ima...ads-posts.html
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Old 05-03-2014, 09:43 AM
KenithO KenithO is offline
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Re: Tips How Eliminate Glossy Sheen?

Tony,

Thanks for the info and link!!!

Have made 5 different examples and for all except the dark square have tried to include dark and light areas.

If there are any problems please tell me and I will try to correct.

Thanks again for your help!!!

Ken
Attached Images
File Type: jpg BDS1582.jpg (90.3 KB, 30 views)
File Type: jpg BW1582.jpg (63.8 KB, 26 views)
File Type: jpg D1582.jpg (93.1 KB, 34 views)
File Type: jpg DRB1582.jpg (71.2 KB, 23 views)
File Type: jpg SDB1582.jpg (85.2 KB, 21 views)
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Old 05-03-2014, 10:50 AM
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Re: Tips How Eliminate Glossy Sheen?

Ken, first I forgot my manners, welcome to RetouchPro .

From the images it is not too clear if you are scanning or photographing the image with a DSLR. I suspect the latter but if you are using a scanner it may be possible to minimise the paper pattern by scanning twice with the image rotated 180 degrees then combined in PS.

Concentrating on the idea that you are using a camera the problem of course is the surface of the paper picking up the lighting direction. The FFT filter will not work well (if at all!) for this type of texture and other filtering methods are likely to have a detrimental effect on image quality i.e. softening too much.

The images show the light direction coming mainly from the top causing the paper surface to be accentuated. Lighting is key! It may be possible to minimise this with careful positioning of your lighting which ideally should be diffused. What you are aiming to do is position at least two lights in such a way that they will have the maximum effect of cancelling out the shadows formed by each. Sometimes just a very diffused light source pretty much straight on in line with the lens can work.

Failing that the cross polarisation may be of help. One resource worth looking at is a pdf presentation Here
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Old 05-07-2014, 09:42 AM
KenithO KenithO is offline
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Re: Tips How Eliminate Glossy Sheen?

Tony,

Thanks for the Welcome and Link!!!

The link is the best I have read concerning problems and possible solutions photographing art. Really liked the comparison photos!!!

You are correct the edited images posted were taken with a Nikon 3100 camera.

"The images show the light direction coming mainly from the top causing the paper surface to be accentuated. Lighting is key! It may be possible to minimise this with careful positioning of your lighting which ideally should be diffused. What you are aiming to do is position at least two lights in such a way that they will have the maximum effect of cancelling out the shadows formed by each. Sometimes just a very diffused light source pretty much straight on in line with the lens can work."

Am thinking about trying a large ring light? Any tips or suggestions?

Also are you using polarized filters? If yes what mfr etc.

Thanks again for all your help!!!

Ken
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