unposterize an image?

J
Posted By
jamesfrmphilly
Apr 26, 2005
Views
811
Replies
8
Status
Closed
I have been getting some poor scans lately.
there seems to be slight posterization with the colors clumping rather than a smooth gradation from hight light to shadow.
is there something in CS that will unposterize the clumps of color?
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MV
Mathias_Vejerslev
Apr 26, 2005
You could try a tiny amount of color noise. In worser cases, you might need to blur a duplicate layer and set it to Color mode.
P
Phosphor
Apr 26, 2005
A better, long-term solution would be to work on getting better color management working between your scanner and Photoshop.

This might help:
<http://scantips.com/basics15.html>
….Particularly, you may want to invest in the latest version of the book recommended at the bottom of that linked page.
J
jamesfrmphilly
Apr 27, 2005
I have just spent hundreds of dollars calibrating every piece of gear that I have. I have not got good results.
I am a little disgusted with the entire color management thing right about now. I guess I’ve given up on getting good scans.
I don’t have any more money to put into it.
RW
Rene_Walling
Apr 27, 2005
I don’t have any more money to put into it.

I would recommend putting effort rather than money into it. You probably just need a bit more knowledge to implement CM properly.

Check out the CM forum:

<http://www.adobeforums.com/cgi-bin/webx?14@@.eea5b31>
GH
Gary_Hummell
Apr 27, 2005
If you can break down your scanning technique into equipment and steps, perhaps we can spot a problem. Color mangement IS frustrating to get on top of but the payout is worth it. The more details you can supply the better. Most of us have made a huge number of mistakes and can probably help.

Gary
A
angus
Apr 28, 2005
Posterization? You mean like a Moiré effect? Don’t lay the image to be scanned at 90 degrees to your scanner, rather twist it a few degrees so it’s sitting at an angle.
P
Phosphor
Apr 28, 2005
"Posterization? You mean like a Moiré effect?">

Posterization & Moiré: two different animals entirely.
PC
Philo_Calhoun
Apr 28, 2005
to add to what Phosphor said:
Posterization is not really fixable (it is trying to bring back lost information). Moiré is fixable.

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