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Digital ICE

Reviewed by Cris Daniels

Composting Techniques Using Adobe Photoshop and Digital ICE

This article will show you some techniques for using Digital ICE to help you quickly and effectively retouch scanned images. Digital ICE is a hardware and software technology licensed by companies such as Nikon and Minolta, that provides an automated scratch and dust removal system. ICE (Image Correction & Enhancement) works by reading surface defects of color film and recording them in a separate channel. A proprietary algorithm is applied to the image, removing all the surface defects within the scan and leaving the original film intact to produce and optimal scan. While this technology sounds immensely helpful to the average photographer, ICE quite often also has the effect of softening the image to an unacceptable degree for some users and therefore never gets used except for damaged film. 

It almost seems that regardless of how careful one is, keep all dust off of my film is extremely difficult. Even mere moments of exposure to the room air (and I do use a filtration system) can have minute particles falling on film very quickly. This, my current method of working with ICE, allows me to waste less time clone stamping images, and also achieves better results than cloning out flaws.

Iíve been using the following  technique with the Nikon Super Coolscan 8000ED.

Step #1 

Load film into the carrier. I ALWAYS handle film with film gloves. Make the minimal investment and buy a bunch. Fingerprints are not easy to deal with and using gloves assures that they will never be a problem. If you are scanning somebody elseís film you probably have no excuse not to use gloves and handle their film correctly.

Step #2  

Load carrier into scanner and begin the scanning process. If you load the film, and simply set the carrier on the desk (with intentions of scanning later), dust and minute particles will fall on the film. At this point youíll need to use a blower bulb to clean the surface again.

Step #3 

Scan the image as usual. Setting the appropriate crop, setting black and white points, curve adjustments, etcÖ

Step #4 

Using the SAME settings, enable Digital ICE in the software. Do not change the crop or other settings.

Step #5 

Save both of the scans. One will be the original version, and the second scan is with the digital ICE processing.

Step #6 

Open both of the scans in Photoshop.

Step #7 

The scan without the ICE processing will be our main image. I renamed the layer ìOriginal Imageî as it is the scan with no processing applied.

My two scans with identical settings except the foreground image was processed with Digital ICE.

Step #8 

Holding the shift key, drag the Digital ICE image over our ìOriginal Imageî, Photoshop will automatically register the image perfectly. The reason this works is because we did not change the crop in the original scan.

Step #9 

Rename the layer ìICE Layerî or something other than what Photoshop name it. Labeling the layers is important in order to know which image we are working on. These are very similar images and it is easy to wind up on the wrong layer.

The first layer is the ìOriginal Imageî and the ìICE Layerî has the eyeball turned off which exposes the dirty original image.

Step #10 

Click on the ìICE Layerî so that it is the active layer. Then click on the layer mask icon.

Step #11 

Go to ìSelectî and choose, ìSelect Allî

Step #12 

Go to ìEditî and choose ìFillÖî. We are going to fill the mask with black which fully reveals the ìOriginal Layerî underneath. This mask renders our current layer ìinvisibleî even with the opacity at 100%. Press ìSelectî, and choose ìDeselectî to deselect our image.

Fill dialog box, here we are specifying how our mask will be filled.

The end result is our black mask, which hides the effect of the current layer.

Step #13 

At this point we simply switch to the paintbrush tool, switch to white as our foreground color (press D to switch to default colors, and X to switch the background color white to the foreground) and begin painting. As we paint on the mask, the digital ICE layer is exposed and we can very quickly paint out the scratches and defects. In this screen shot I have painted out most of the defects except the left side of the screen. You can of course vary the size and opacity of the paintbrush to change the potency of the effect.  To reverse any changes you have made, simply press the X key to make black the foreground color, and paint back the original image.

Digital ICE may not suit everybodyís needs applied to a whole image, but using an ICE layer can really save significant time retouching and is less obvious than the cloning tools (especially in the sky areas). You can use this technique by using the Photoshop Dust and Scratches filter also, but ICE works better and preserves more detail. 

Cris Daniels is a Florida-based photographer who also works with other photographers in migrating to digital imaging. Cris is an Adobe Certified Expert in Photoshop

© 2001 Cris Daniels / All Rights Reserved

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Concepts: Photography, Image scanner, Digital photography, Nikon, Kodachrome, Black-and-white, Scan, RGB color model

Entities: Nikon, Minolta, ICE, Michael Reichmann, Cris Daniels, Cris, Photoshop

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