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Thread started 03 Jul 2010 (Saturday) 19:14
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scanning textured photo paper

 
Kent ­ Clark
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Jul 03, 2010 19:14 |  #1

I have some family photos that are on textured photo paper. When they are scanned the facets of the texture are like little mirrors and create thousands of white dots on the scan. Is there anything I can do to get a better scan? I'm using an HP 7200 all in one scanner with the HP software, importing into CS4.




  
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Damo77
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Jul 03, 2010 20:12 |  #2

When you say "white dots" are they pure white (ie complete absence of detail)? Or just lighter areas?


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chrisa
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Jul 03, 2010 20:21 |  #3

Turn off any sharpening on the scanner.




  
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ChasP505
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Jul 03, 2010 20:46 as a reply to  @ chrisa's post |  #4

Here's a tutorial:

http://retouchpro.com/​tutorials/?m=show&id=1​85 (external link)

Or take a new photo of the old photo with good lighting to eliminate shadows.


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Kent ­ Clark
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Jul 03, 2010 20:46 |  #5

Damo, they are pure white speckles. You look at the photo and it's clean, you look at the scan and it looks like little white stars all over or like the photo is covered with dust, which it is not. Chrisa, I have turned off the sharpening.

If I scan a smooth glossy photo there is no problem. And the photos that have a linen look show the speckles in the weave pattern so it's pretty obvious it is the paper texture that is doing this.

Chas, I'll give that a try. The website says 2007, I wonder if it will work with CS4?




  
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Damo77
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Jul 03, 2010 21:31 |  #6

No, I can't get the FFT filter to work properly in CS4. It's the only reason I ever open CS2 these days.


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chrisa
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Jul 03, 2010 21:35 |  #7

A lot of photographers used to use the textured paper to stop people scanning the prints.




  
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Jul 03, 2010 21:45 |  #8

chrisa wrote in post #10473465 (external link)
A lot of photographers used to use the textured paper to stop people scanning the prints.

Heh! Yeah, and they were pretty successful at it, as we can see:)! What you get is terrible if you try to enlarge it, white spots or no!


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Kent ­ Clark
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Jul 03, 2010 21:45 |  #9

Most of these photos are from the 50s and 60s, they were professional photos but it was long before scanners.




  
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Damo77
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Jul 03, 2010 21:45 |  #10

I'd love to see a closeup of these white speckles.


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Kent ­ Clark
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Jul 03, 2010 22:03 as a reply to  @ Damo77's post |  #11

Here is a crop of one of them.


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Damo77
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Jul 03, 2010 22:27 |  #12

Oh boy, I don't think FFT is going to help there.

Better try photographing the photograph, as Chas suggested.


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HankScorpio
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Jul 04, 2010 07:16 |  #13

FFT really doesn't help here sadly, we get many textured prints at work to use as a source (which is very annoying, if you are planning to have some packaging made and are planning to send a textured print to become the main image, don't! - rant over).

We use one of two methods:

1. The low pass method;

Duplicate the background layer, use Filter>Noise>Dust & Scratches with a threshold of 0 and the lowest pixel level that removes the problem.

Then set that layer to Darken blend mode.

Pros:
It's quick.

Cons:
It does lose fine detail.

2. Double scanning;

The reason you get these highlights is because the light source in flatbed scanners is not at 90 degrees. Luckily though, they are rarely at 45 degrees either, so...

Scan the image then rotate it 180 degrees on the scanner bed and scan it again.
Place both scans on different layers, rotate the upside down one to be the right way up.
Carefully align the scans (Later versions of Photoshop have an auto align layers function in the Edit menu which is great)
Set the top most layer to Darken blend mode.

Pros:
Better detail retention.

Cons:
Takes twice as long.


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ChasP505
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Jul 04, 2010 10:13 |  #14

Damo77 wrote in post #10473649 (external link)
Oh boy, I don't think FFT is going to help there.

+1.... Quoted for agreement!

I like HankScorpio's method #2. It's worked for me in the past.

But looking at that sample... Is that simply surface wear from friction?


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Tdragone
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Jul 04, 2010 14:11 |  #15

ChasP505 wrote in post #10475381 (external link)
But looking at that sample... Is that simply surface wear from friction?

No It's not wear, it actually IS a texture on the photograph. you don't notice it when looking at the picture straight on, but the scanner's lamp highlights it horribly. I'm going to the the double scan method above.. it's an interesting way to tackle this issue. Thanks Hank.


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scanning textured photo paper
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