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Written by Denny Tang

WEDNESDAY, 20 SEPTEMBER 2006

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Identifying the SaturationFirst, we need to find the areas that are saturated. To do this, we just simplycreate a layer with no saturation and change the blending mode to Difference.

1.Open a photo you would like to edit. Or, you may use the photo used in

this tutorial (from iStockPhoto).

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From iStockPhoto

2. Create a new Hue/Saturation adjustment layer (Layer> New

Adjustment Layer> Hue/Saturation). When the Hue/Saturation tool

appears, reduce the saturation to -100. Click OK when done.

New Hue/Saturation adjustment layer.

3. Change the blending mode of the adjustment layer to Difference.

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Using the Saturation DataNow that we have an image that shows the difference

1. Make sure the layer mask is activated. The thumbnail of the

layer mask in the layers window should have a white border around it. If 

it doesn't, click on the thumbnail to activate the layer mask.

2. With the layer mask selected, open the Apply Image tool

(Image> Apply Image). The default settings should be fine so you may

simply click OK if the settings are default:

Layer: Merged

Channel: RGB

Invert: Unchecked

Blending: Multiply

Opacity: 100%

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Final results(Rollover your cursor over the above image to see the unedited image.)

With and Without Layer Mask 

With and Without Layer Mask. Layer mask inverted. 

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