Graphic Design Exercises
Photoshop: Background Blur

Objective |
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To be introduced to Photoshop's silhouetting, masking and blurring
tools. To recreate the
above retouched image by example.
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Discussion |
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Depth is an illusion in 2D space. One way to create depth is to
see the way a camera sees the world. Photographers like to use
a "shallow" depth of field to exaggerate this effect. In addition
to fooling the eye into "seeing" depth, we have the additional
benefit of selective focus, or creating a focal point. Focal
points are important in art because they allow viewers an easy
entry point into the image.
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Procedure |
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prepping the file
- download starter file, open in Photoshop
- practice Adobe navigation keyboard shortcuts: space = hand;
space + cmd = zoom in; space + cmd + opt = zoom out; cmd + zero
= fit in window
- double-click "Background" layer; rename "Original
Image"
(this is now a "normal" layer)
- dupe layer 3x, rename: "foreground", "midground",
"background" (opt-drag layer to "new layer"
icon)
masking the background layer
- go to "background" layer, hide others
- magnetic lasso tool: silhouette sergeant + soldier (single-click
a starting point; DELETE removes anchors; single-click adds an
anchor; double-clicking will close the selection)
- quickmask mode: retouch by painting black or white (double-click tool for options: mask color, reverse mask)
- select > save selection (new channel "sergeant + soldier"),
deselect
- select > load selection "sergeant + soldier" (or
cmd-click on thumbnail in channels floating palette)
- layer > layer mask > hide selection (this makes a hole in the picture)
masking the midground layer
- go to "midground" layer, hide others
- select > load selection "sergeant + soldier" (or
cmd-click on mask thumbnail on "background" layer)
- layer > layer mask > reveal selection (this
removes the background)
masking the foreground layer
- go to "foreground" layer, hide others
- select > load selection "sergeant + soldier"(or
cmd-click on mask thumbnail on "background" layer)
- quickmask mode: remove sergeant from selection (only the soldier
is now selected)
- standard mode: select > modify > expand: 5 (selection
is now wider than soldier)
- layer > layer mask > reveal selection (this leaves just the soldier)
blurring
- foreground layer: gaussian blur: 3
- background layer: gaussian blur: 5
adding noise
- new layer "noise", edit > fill: 50% gray
- move to above "background" layer
- filter > noise > add noise: gaussian, amount = 10
- filter > noise > median: 1
- make "noise" layer "overlay" mode (gray becomes invisible)
- dupe "noise" layer, move to top
- make clipping mask with "foreground" layer (opt+click on line between layers)
grading
- print a proof with your name on it for grading
- file your graded proof in your 3-ring binder for individual review
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Version 1.0 Last updated:
9/17/09
Webmaster: Paul
Young