Photoshop
Softening Nighttime Shots With Gaussian Blur
Adapted from Nighttime Digital Photography with Adobe Photoshop CS3 (Peachpit Press)
By John Carucci
Dateline: January 25, 2008
Version: Adobe Photoshop CS3
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Sometimes the harshness of night illumination shows too
many facial blemishes. Since you have the power, why not
remove them? Cloning them out can work for individual
marks, but for overall appearance, creating a soft mask for the
face provides the subject with a pleasant appearance. This
technique requires a duplication layer of the image, a Gaussian
blur, and some careful cutouts. The intensity of the effect
can be controlled via the layer Opacity setting. To work along with the example, download and open Alicia.jpg in Photoshop.
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Despite Alicia’s smooth complexion, the angle of light shows a texture
on her face. Rather than touch up each blemish, I duplicated
the layer by dragging the active layer to the New layer button on the bottom
of the palette. Name it Blur.
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Draw an outline around the subject using the Lasso tool. This will limit
the blur to roughly the subject area.
Apply a Gaussian Blur by going to Filters > Blur > Gaussian Blur.
Radius was set at 9 pixels. The higher the setting, the more blur.
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Since the subject area is all that should blur, let’s remove it from
the background. The area is already selected; just inverse it and click
Delete. Click off the eye on the Background layer to see your handiwork.
At this stage, the image resembles a Photoshop project gone awry.
That’s good! The key here is to blend and tweak this image into position.
The Gaussian Blur provides an overall softness to the face. To make it
appear natural, the lips, facial hair, and eyes must be sharp. Use the Brush
tool to clean up the area around her head and shoulders. Turn the Background
layer back on.
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Now let’s get to work on the blurred area. Start with the eyes. Magnify
the workspace as much as possible, and fi nd a brush size that allows you
eradicate just the blurred eyes. The brush should have a hardness of 50%.
Erase the area inside the eyes on the Blur layer to reveal a sharper eye on
the Background layer.
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Eyebrows are next. Match the brush size to the width of the eyebrow
and set the hardness to 50%.
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 At this point, most of her face is still blurred. The nose and the lips still need to be sharpened. Let’s clean them up.
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On the Blur layer, remove the blur on the lips. Be sure to soften the
edges and set the brush hardness to 75%.
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All that remains to sharpen is her hair, shirt, and halo
from the initial selection. By removing the blur from her face,
neck, and shoulders, those features now appear quite sharp.
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After applying the blur, and selectively removing it from
the features we want to emphasize, it’s time to go back to the
blurred area to fine-tune it. It appears unrealistic in its current
state. Let’s tone it down by adjusting the opacity
of the Blur layer to 50%.
For a finishing touch, the image was
cropped to show off the subject (click to enlarge).
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