Removing grain from scans?

[Akuma]

We have some really grainy supplied scans. Anyone got a method for removing grain in PS??

[willisnr]

one method I use for selectively removing grain is to use the dust and scratches filter (Noise / dust and scratches). I normally use a low radius with quite a high tolerance, but it's whatever is best with this filter. Sometimes this filter takes out too much highlight, and is no good.

A workaround for this is to apply the filter selectively, and use the history brush - apply the filter, then in history pallete click on the history box on the left hand side, on the most recent step (the filtered image). Then select the previous step in the history pallete. This will now allow you to use the history brush to apply the characteristics of the selected step in the history pallete to the unfiltered image on the screen. This has saved me many times.

I have read a couple of photoshop books and I haven't found a better method. Sorry if you already knew this tip, it may be that you have tried to apply this and were not happy with the results - it may not be an ideal solution - what does the image look like?

Anywho, hope this helps
Cheers,
Will

:fro: :fro: :fro:

[David]

Originally Posted by Akuma

We have some really grainy supplied scans. Anyone got a method for removing grain in PS??

There is a plug in for PS called Grain Surgery that does a great job at this. We use it here all the time.

Hope this helps,
David

[Pointyhat]

The median filter may help some also noise>median, perhaps in tandem with the dust & scratches

[Akuma]

Grain Surgery = US?$199.00
that better be good

[papawestray]

you can use smart blur if you have PHOTOSHOP CS or smart sharpen in CS2

you can also apply bluring, noise etc at different levels ot each channell this will give better rusults
ie apply more to C & M and not so mutch yo Y & K etc and so on etc.

[Angstbooy]

I get a lot of crusty photos from clients. Here's a tip on how to get
rid of a lot of the color noise in JPEG compressed images.

1. Open the bugger in Photoshop
2. Change the color mode to LAB (IMAGE>MODE>LAB)
3. Open the channels pallet, you'll see three channels LIGHTNESS, A
and B the A and B channels are the color channels
4. Select channel A and apply the Median filter (FILTER>NOISE>MEDIAN)
5. In the Median filter dialog box choose a setting that gets rid of
the blocky artifacts
6. Do the same for the B color channel
7. Viola! no more color noise you can then convert the image to RGB
or CMYK