background swapping-another take.pdf

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Background Swapping - Another Take
by Al Ward
Action Fx Photoshop Resources
http://actionfx.com
Hello everyone in NAPP land. I have just returned from the 2004 West Coast Photoshop
World conference, and what a trip! It is always good to confer with my friends at NAPP
as well as a few people I’ve come to respect in the industry. It is a great place to renew
contact with old friends, meet new friends with similar interests, and learn in the
process. I always return energized and excited about Photoshop all lover again.
This week let’s take another look at background replacement. Generally, I extract my
subjects from their backgrounds using the Extract filter, but this time I will just use a
mask to separate my subject from the surrounding pixels. In the process, we will also
cover a little touch up to effect the overall tone of the piece. If you are ready, let’s get
started.
To start I’ve chosen an image/model that I’ve used before. I love this pose however, and
think it will lend itself well to the end effect. This image can be found at Photos.com.
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The gray background the model is up against really doesn’t add much to the
imagination, even if the costume and pose do. Let’s dress that up a bit. I’ve chosen a
second image from Photos.com that has a definite grunge feel to it.
Select the entire wall image, copy it and paste it into it’s own layer in the document with
the model. The second image in this case is wider than it is high, so some rotating and
transforming needs to take place. With the Transform tools, first rotate the wall layer 90
degrees CCW, then transform it so that it covers the entire layer.
Accept the transformation.
Neat, a layer containing the model needs to be placed above the new background, or
wall, layer. Copy the Background layer and move it above the layer with the wall. Using
your favorite selection tool, select the gray areas behind the model. In this instance, I’ve
simply used the Magic Wand tool. Next, create a mask for the layer. In the mask fill the
selected background with black , select Inverse and fill the model area with white.
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Your image will look something like that seen here. Don’t worry that the edges are
imperfect… you can clean those up shortly.
Let’s put some shine on that sword. We can do this a couple ways. First, create a Curves
adjustment layer and create a curve similar to that seen here.
Set Black as the foreground color and, in the Mask for the Curves adjustment layer,
paint over those areas that you do not want affected by the curve. For instance, the
reflections off the uniform, the skin, the red areas of the costume and so forth.
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The sword can be made brighter by creating a new layer above the Curves layer and
setting the Blend Mode for the layer to Soft Light. Paint over the blade with white. You
may also want to make it appear the reflection off the blade is lightening the woman’s
face also.
For the next part of the project, I want to darken the overall image but with a subtle
hint of grunge. To do this I’m setting the foreground color to a median gray and the
background color to white. I’ve created a new layer and run the Clouds filter on the
layer. I don’t really want this to affect my model, but just the background. To do this
Command/Control+Click the Model layer’s mask. Create a mask for the clouds layer and
ensure the model area is filled with black in the mask and white over the rest. Set the
Blending Mode for this layer to Color Burn.
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For this piece I really want to thicken the color (personal preference I suppose), so I’m
creating a Hue/Saturation adjustment layer at the top of the layer stack and increasing
the Saturation to +48. I’ll leave the Hue and Lightness sliders alone.
If you still have some light areas showing around the model that may not have been hid
by the mask, select the model layer and use the Burn tool to darken the edges.
The Burn tool can also be used to add some shadow to the new background. My settings
are as follows:
Selecting the new background layer, I’m running the Burn tool to the left of the sword
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